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Hurricane surge inundation

SDE Feature Class

Tags
hurricanes, surge, coast, flood, mean tide, environment, geoscientificInformation, oceans


Summary

To assist Federal, State and local Emergency Management officials, and related officials, in preparing for and responding to flooding from hurricane storm surge.

Description

Hurricane Surge Inundation for coastal Maine assuming peak hurricane surge arrives coincident with mean tide. Hurricane Evacuation Study funds are provided by the Federal Emergency Management Agency, the US Army Corps of Engineers and the State. Local community officials and agencies have provided valuable data and coordination throughout the study at their own expense. The Authority for the US Army Corps of Engineers' participation in this study is Section 206 of the Flood Control Act of 1960 (Public Law 86-645). The Federal Emergency Management Agency's participation is authorized by the Disaster Relief Act of 1974 (Public Law 93-288). These laws authorize the allocation of resources for planning activities related to hurricane preparedness.

Credits

Credit should always be given to the data source and/or originator when the data is transferred or printed.

Use limitations

Users of the Hurricane Surge Inundation Maps should recognize that there are accuracy limitations inherent to each of the data sources used to create the maps. The SLOSH model hurricane surge elevations have an accuracy of +/- 20%. The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'. The basemap data, such as the shoreline, roads, rivers, streams, and schools, has a horizontal accuracy of approximately +/- 25'. Therefore, the maps should be used as a general guide, rather than an absolute representation, as to which areas can expect to be inundated (flooded) by worst-case hurricane storm surge for a particular hurricane category. In addition, users should note that there may be areas that are not shown to be inundated by hurricane surge, but are in fact surrounded by hurricane surge. Those areas may become isolated by hurricane surge. Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS.

Extent

West  -70.892063    East  -66.941265
North  45.065778    South  42.974881

Scale Range
Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

*Content type  Downloadable Data


Citation 

*Title GISVIEW.MEGIS.Hurr_surge_inun_mt
Publication date 2005-02-16 00:00:00


Presentation formats* digital map


Citation Contacts 

Responsible party
Organization's name US Army Corps of Engineers New England District
Contact's role  originator


Contact information
Phone
Voice 978-318-8111

Address
Type physical
Delivery point 696 Virginia Rd
City Concord
Administrative area MA
Postal code 01742
e-mail addresscenae-pa@usace.army.mil



Resource Details 

Dataset languages  English (UNITED STATES)
Dataset character set  utf8 - 8 bit UCS Transfer Format


Spatial representation type* vector


*Processing environment Microsoft Windows Server 2003 Version 5.2 (Build 3790) Service Pack 2; Esri ArcGIS 10.1.1.3143


Credits
Credit should always be given to the data source and/or originator when the data is transferred or printed.
ArcGIS item properties
*Name GISVIEW.MEGIS.Hurr_surge_inun_mt
*Location Server=sql-gisview-prod.som.w2k.state.me.us; Service=sde:sqlserver:sql-gisview-prod.som.w2k.state.me.us,1633; Database=GISVIEW; User=MEGIS; Version=dbo.DEFAULT
*Access protocol ArcSDE Connection

Extents 

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -70.892063
*East longitude -66.941265
*North latitude 45.065778
*South latitude 42.974881
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 351006.499922
*East longitude 662126.499700
*South latitude 4759943.359481
*North latitude 4990257.499855
*Extent contains the resource Yes

Resource Maintenance 

Resource maintenance
Update frequency  unknown


Resource Constraints 

Constraints
Limitations of use
Users of the Hurricane Surge Inundation Maps should recognize that there are accuracy limitations inherent to each of the data sources used to create the maps. The SLOSH model hurricane surge elevations have an accuracy of +/- 20%. The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'. The basemap data, such as the shoreline, roads, rivers, streams, and schools, has a horizontal accuracy of approximately +/- 25'. Therefore, the maps should be used as a general guide, rather than an absolute representation, as to which areas can expect to be inundated (flooded) by worst-case hurricane storm surge for a particular hurricane category. In addition, users should note that there may be areas that are not shown to be inundated by hurricane surge, but are in fact surrounded by hurricane surge. Those areas may become isolated by hurricane surge. Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS.

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983
*Projection NAD_1983_UTM_Zone_19N
*Coordinate reference details
Projected coordinate system
Well-known identifier 26919
X origin -5120899.9996383647
Y origin -9998099.9996718708
XY scale 7812.4999927240397
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.0010240000009536746
Z tolerance 2
M tolerance 2
High precision true
Latest well-known identifier 26919
Well-known text PROJCS["NAD_1983_UTM_Zone_19N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-69.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26919]]

Reference system identifier
*Value 26919
*Codespace EPSG
*Version 7.11.2


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name GISVIEW.MEGIS.Hurr_surge_inun_mt
*Object type  composite
*Object count 364176



ArcGIS Feature Class Properties
Feature class name GISVIEW.MEGIS.Hurr_surge_inun_mt
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 364176
*Spatial index TRUE
*Linear referencing FALSE



Distribution 

Distributor
Contact information
Organization's name Maine Office of Geographic Information Systems
Contact's position GIS Coordinator
Contact's role  distributor


Contact information
Phone
Voice 207-624-7700

Address
Type postal
Delivery point State House Station #145
City Augusta
Administrative area Maine
Postal code 04333
Country USA
e-mail addressOIT.Customer-Support@maine.gov

Hours of service 9 am to 5 pm EST
Contact instructions
Monday through Friday


Available format
*Name SDE Feature Class


Transfer options
Online source
*Location Server=sql-gisview-prod.som.w2k.state.me.us; Service=sde:sqlserver:sql-gisview-prod.som.w2k.state.me.us,1633; Database=GISVIEW; User=MEGIS; Version=dbo.DEFAULT
*Access protocol ArcSDE Connection
*Description  Downloadable Data



Fields 

Details for object GISVIEW.MEGIS.Hurr_surge_inun_mt 
*Type Feature Class
*Row count 364176
Definition
polygon feature class
Definition source
Environmental Systems Research Institute, Inc. (ESRI)


Field OBJECTID
 
*Alias OBJECTID
*Data type OID
*Width 4
*Precision 10
*Scale 0
*Field description
Internal feature number.
*Description source
ESRI
*Description of values Sequential unique whole numbers that are automatically generated.




Field CATEGORY
 
*Alias SHAPE
*Data type Geometry
*Width 4
*Precision 0
*Scale 0
*Field description
Feature geometry.
*Description source
Esri
*Description of values Coordinates defining the features.




Field SHAPE
 
*Alias SHAPE.area
*Data type Double
*Width 0
*Precision 0
*Scale 0
*Field description
Feature geometry.
*Description source
ESRI
*Description of values Coordinates defining the features.




Field SHAPE.AREA
 
*Alias SHAPE.len
*Data type Double
*Width 0
*Precision 0
*Scale 0




Field SHAPE.LEN
 
*Alias CATEGORY
*Data type SmallInteger
*Width 2
*Precision 5
*Scale 0




Field Category
 
Field description
Hurricane Category associated with the hurricane surge limit of that polygon
Description source
National Hurricane Center SLOSH Model




Overview Description
Entity and Attribute Overview Each polygon is assigned a category number, which indicates the hurricane category, according to the Saffir-Simpson scale, at which the area would be flooded by hurricane surge.


Entity and Attribute Detail Citation Each polygon contains a hurricane category ranging from 1 to 4, according to the Saffir-Simpson scale. The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.




Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  8859part1 - Latin alphabet No. 1


Scope of the data described by the metadata* dataset
Scope name* dataset


*Last update 2013-12-05


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2011-05-10 08:33:44
Last modified in ArcGIS for the item 2013-12-05 12:08:05


Automatic updates
Have been performed Yes
Last update 2013-12-05 12:02:43


Metadata Contacts 

Metadata contact
Organization's name US Army Corps of Engineers New England District
Contact's role  point of contact


Contact information
Phone
Voice 978-318-8111

Address
Type physical
Delivery point 696 Virginia Rd
City Concord
Administrative area MA
Postal code 01742
e-mail addresscenae-pa@usace.army.mil



Thumbnail and Enclosures 

FGDC Metadata (read-only) 

Identification 

Citation
Citation Information
OriginatorMatthew Walsh, U.S. Army Corps of Engineers New England District
Publication Date2005-02-16
Title
GISVIEW.MEGIS.Hurr_surge_inun_mt
Geospatial Data Presentation Formvector digital data
Series Information
Series NameHurricane Surge Inundation Maps
Issue IdentificationMaine Hurricane Evacuation Study
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)
Other Citation Details
1:9600
Online Linkagehttp://megis.maine.gov/catalog/

Description
Abstract
                            Hurricane Surge Inundation for coastal Maine assuming peak hurricane surge arrives coincident with mean tide. Hurricane Evacuation Study funds are provided by the Federal Emergency Management Agency, the US Army Corps of Engineers and the State. Local community officials and agencies have provided valuable data and coordination throughout the study at their own expense. The Authority for the US Army Corps of Engineers' participation in this study is Section 206 of the Flood Control Act of 1960 (Public Law 86-645). The Federal Emergency Management Agency's participation is authorized by the Disaster Relief Act of 1974 (Public Law 93-288). These laws authorize the allocation of resources for planning activities related to hurricane preparedness.
                          
Purpose
                            To assist Federal, State and local Emergency Management officials, and related officials, in preparing for and responding to flooding from hurricane storm surge.
                          
Supplemental Information
                            Hurricane Surge Inundation Maps for the Maine Hurricane Evacuation Study were prepared by the U.S. Army Corps of Engineers, New England District. These maps were developed using GIS software by overlaying the hurricane surge water surface elevations from the SLOSH model on top of ground elevations from the USGS National Elevation Dataset to show which areas would be inundated (flooded) by hurricane storm surge. For each hurricane category, the hurricane surge elevation that results from the worst-case combination of hurricane landfall location, forward speed, and direction at each location along the coast was used in preparing the hurricane surge inundation mapping. This was done for two reasons. First, it is difficult to predict in advance at what location that the hurricane will make landfall. Second, for Emergency Management Planning purposes, it is best to plan for the worst case, and adjust Emergency Management activities based on actual conditions. Because of the large tidal range along the Maine coast, two sets of hurricane surge inundation maps were developed. One set of maps shows the areas that would be inundated by hurricane surge assuming that peak storm surge arrived coincident with mean tide, and the other set of maps shows the areas that would be inundated by hurricane surge assuming that peak storm surge arrived coincident with mean high tide. Of the two sets of maps, the most extensive inundation is shown on the mean high tide maps. The tide scenario is printed on the bottom of each map. The maps are titled "MeanTide" and "MeanHighTide". The maps were produced at a scale of 1" = 2,000". When printed at their full size, the maps are 34" x 44". There are 31 maps that cover the entire extent of coastal Maine that could expect to be inundated by hurricane storm surge under worst case conditions. A  Map Index, with legend, shows the area covered by each of the 31 maps. Index and maps available in .pdf format at http://megis.maine.gov/maps .
                          
Time Period of Content
Time Period Information
Single Date/Time
Calendar Date2005-02-16
Time of DayUnknown
Currentness Reference
                            publication date
                          
Status
ProgressComplete
Maintenance and Update FrequencyNone planned

Spatial Domain
Bounding Coordinates
West Bounding Coordinate-70.892063
East Bounding Coordinate-66.941265
North Bounding Coordinate45.065778
South Bounding Coordinate42.974881

Keywords
Theme
Theme Keyword ThesaurusMaine GIS Thesaurus-Theme
Theme Keywordhurricanes
Theme Keywordsurge
Theme Keywordcoast
Theme Keywordflood
Theme Keywordmean tide

Theme
Theme Keyword ThesaurusISO Keyword Thesaurus
Theme Keywordenvironment
Theme KeywordgeoscientificInformation
Theme Keywordoceans

Place
Place Keyword ThesaurusMaine GIS Thesaurus-Place
Place KeywordMaine
Place KeywordGulf of Maine

Stratum
Stratum Keyword ThesaurusGCMD Parameter Keyword
Stratum Keywordhydrosphere
Stratum Keywordoceans

Access Constraints
                        none
                      
Use Constraints
                        Users of the Hurricane Surge Inundation Maps should recognize that there are accuracy limitations inherent to each of the data sources used to create the maps.  The SLOSH model hurricane surge elevations have an accuracy of +/- 20%.  The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'.  The basemap data, such as the shoreline, roads, rivers, streams, and schools, has a horizontal accuracy of approximately +/- 25'.  Therefore, the maps should be used as  a general guide, rather than an absolute representation, as to which areas can expect to be inundated (flooded) by worst-case hurricane storm surge for a particular hurricane category.  In addition, users should note that there may be areas that are not shown to be inundated by hurricane surge, but are in fact surrounded by hurricane surge.  Those areas may become isolated by hurricane surge.

Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS.
                      
Point of Contact
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Army Corps of Engineers, New England District
Contact PositionGeospatial Data and Systems Point of Contact
Contact Address
Address Typemailing and physical address
Address696 Virginia Road
CityConcord
State or ProvinceMA
Postal Code01742
CountryUNITED STATES

Contact Voice Telephone978-318-8647
Contact Facsimile Telephone978-318-8080

Data Set Credit
                        Credit should always be given to the data source and/or originator when the data is transferred or printed.
                      
Security Information
Security ClassificationUnclassified

Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 and Maine Office of Information Technology (OIT) Oracle 9i, Maine Office of Geographic Information Systems (MEGIS), Maine GIS SDE; Maine GIS Internet Data Catalog http://megis.maine.gov/catalog
Cross Reference
Citation Information
OriginatorMatthew Walsh, U.S. Army Corps of Engineers New England District
Publication Date2005-02-16
Title
hurr_surge_inun_MHT
Geospatial Data Presentation Formvector digital data
Series Information
Series NameHurricane Surge Inundation Maps
Issue IdentificationMaine Hurricane Evacuation Study
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)
Other Citation Details
1:9600
Online Linkagehttp://megis.maine.gov/catalog/


Data Quality 

Logical Consistency Report
                        SLOSH: Because of the large tidal range along the Maine coast, two SLOSH models were run for this study. One model calculated hurricane surge elevations assuming that peak storm surge arrived coincident with mean tide, and the other calculated hurricane surge elevations assuming that peak storm surge arrived coincident with mean high tide. The SLOSH model calculates the hurricane surge elevation that would result from over 500 combinations of hurricane category, landfall location, forward speed, and direction.

Hurricane Category: One of the earlier guides developed to describe the potential storm
surge generated by hurricanes is the Saffir/Simpson Hurricane Scale, which assigns a
Hurricane Category according to the maximum sustained wind speed within the
hurricane. It was developed by Herbert Saffir, Dade County, Florida, Consulting
Engineer, and Dr. Robert H. Simpson, former Director of the National Hurricane Center.
A condensed version of the Saffir/Simpson Hurricane Scale is shown in the table below.
Saffir/Simpson Hurricane Scale
Category Maximum Sustained
Wind Speed (mph)
1 74-95
2 96-110
3 111-130
4 131-155
5 > 155

FEMA Flood Zone Coincidence: The FEMA 100- and 500-year flood zones may depict
areas beyond the hurricane surge inundation areas where coastal or inland flooding may
be expected. FEMA Flood zones were not available in electronic format for Knox and
Lincoln Counties.
                      
Completeness Report
                        The entire extent of coastal Maine that could expect to be inundated by hurricane storm surge under worst case conditions. Two Hurricane Surge Inundation GIS layers were developed from this effort one each for the mean tide and the mean high tide scenarios.
                      
Positional Accuracy
Horizontal Positional Accuracy
Horizontal Positional Accuracy Report
                                Users of the Hurricane Surge Inundation Maps should recognize that there are accuracy limitations inherent to each of the data sources used to create the maps.  The SLOSH model hurricane surge elevations have an accuracy of +/- 20%.  The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'.  The basemap data, such as the shoreline, roads, rivers, streams, and schools, has a horizontal accuracy of approximately +/- 25'.  Therefore, the maps should be used as  a general guide, rather than an absolute representation, as to which areas can expect to be inundated (flooded) by worst-case hurricane storm surge for a particular hurricane category.  In addition, users should note that there may be areas that are not shown to be inundated by hurricane surge, but are in fact surrounded by hurricane surge.  Those areas may become isolated by hurricane surge.
                              
Quantitative Horizontal Positional Accuracy Assessment
Horizontal Positional Accuracy Value8
Horizontal Positional Accuracy Explanation
                                    The SLOSH model hurricane surge elevations have an accuracy of +/- 20%.  The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'.  The basemap data, such as the shoreline, roads, rivers, streams, and schools, has a horizontal accuracy of approximately +/- 25'.
                                  
Vertical Positional Accuracy
Vertical Positional Accuracy Report
                                Users of the Hurricane Surge Inundation Maps should recognize that there are accuracy limitations inherent to each of the data sources that was used to create the maps.  The SLOSH model hurricane surge elevations have an accuracy of +/- 20%.  The elevation data has a vertical accuracy of approximately +/- 7' and a horizontal accuracy of approximately +/- 25'.
                              
Quantitative Vertical Positional Accuracy Assessment
Vertical Positional Accuracy Value2
Vertical Positional Accuracy Explanation
                                    The SLOSH model hurricane surge elevations have an accuracy of +/- 20%.  The elevation data has a vertical accuracy of approximately +/- 7'.
                                  
Lineage
Source Information
Source Citation
Citation Information
OriginatorNational Hurricane Center
Title
(SLOSH) Sea, Lake and Overland Surge from Hurricanes
Series Information
Series NameSLOSH
Issue IdentificationPenobscot Bay Basin
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)
Other Citation Details
The Sea, Lake, and Overland Surges from Hurricanes (SLOSH) model was developed by the National Weather Service to calculate potential surge heights from hurricanes. The SLOSH model for the Maine Hurricane Evacuation Study was run by the Storm Surge Group, National Hurricane Center, National Centers for Environmental Prediction, National Oceanic and Atmospheric Administration, Miami Florida.

Source Time Period of Content
Time Period Information
Single Date/Time
Time of DayUnknown
Source Citation Abbreviation
slosh
Source Information
Source Citation
Citation Information
OriginatorU.S. Geological Survey (USGS)
Publication Datemultiple dates
Publication TimeUnknown
Title
(24k) USGS 1:24,000 scale quadrangles
Geospatial Data Presentation Formmap
Series Information
Series NameNational Mapping Program Standard Series Topographic Maps
Issue IdentificationUSGS 7.5 Minute Map Series
Publication Information
Publication PlaceReston VA
PublisherU.S. Geological Survey
Other Citation Details
24000 Publication date is unique to each quadrangle in the map series. Standard 7.5x7.5 minute quadrangles cover geographic areas of 49 to 71 square miles. 1 inch at map scale represents 2000 feet.
Online Linkagehttp://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Scale Denominator24000
Type of Source Mediastable-base material (mylar)
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1948-01-01
Beginning TimeUnknown
Ending DatePresent
Ending TimeUnknown
Source Currentness Reference
publication date
Source Citation Abbreviation
24k
Source Contribution
                                coast, roads, rivers, streams
                              
Source Information
Source Citation
Citation Information
OriginatorU.S. Geological Survey (USGS)
Publication Date1979-07-01
Publication TimeUnknown
Title
(30MDEM) 7.5 minute digital elevation model
Geospatial Data Presentation Formraster digital data
Series Information
Series NameUSGS Digital Elevation Models
Issue Identification7.5 minute dem
Publication Information
Publication PlaceReston VA
PublisherU.S. Geological Survey
Other Citation Details
U.S.Department of the Interior, U.S. Geological Survey Digital Elevation Models -- Data Users Guide; Reston, VA, A hypertext extract is available at: URL: http://edc.usgs.gov/glis/hyper/guide/usgs_dem Softcopies in ASCII and WordPerfect format are available at: URL: ftp://mapping.usgs.gov/pub/ti/DEM/ U.S.Department of the Interior, U.S. Geological Survey, 1992, Standards for digital elevation models: Reston, VA, Softcopies in ASCII and WordPerfect format are available at: URL: ftp://mapping.usgs.gov/pub/ti/DEM/
Online Linkagehttp://edc.usgs.gov/glis/hyper/guide/usgs_dem

Source Scale Denominator999999
Type of Source Mediaonline
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1979-07-01
Beginning TimeUnknown
Ending DatePresent
Ending TimeUnknown
Source Currentness Reference
source dates
Source Citation Abbreviation
30mdem
Source Information
Source Citation
Citation Information
OriginatorMaine Office of Geographic Information Systems (MEGIS)
Publication Date2007-07-01
Publication TimeUnknown
Title
metwp24
Geospatial Data Presentation Formvector digital data
Series Information
Series NameMaine GIS
Issue IdentificationSDE server; Internet Data Catalog
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems
Other Citation Details
1:24000
Online Linkagehttp://megis.maine.gov/catalog/

Source Scale Denominator24000
Type of Source Mediaonline
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1948-01-01
Beginning TimeUnknown
Ending Date2005-08-22
Ending TimeUnknown
Source Currentness Reference
source dates
Source Citation Abbreviation
metwp24
Source Contribution
                                towns
                              
Process Step
Process Description
                                Obtained SLOSH (Sea, Lake and Overland Surge from Hurricanes) model output from the National Hurricane Center.  The data was provided in ArcView shapefile format as a polygon shapefile.  The polygon shapefile represented the Penobscot Bay SLOSH Basin.  Each polygon contained eight attribues.  The attributes represented the water surface elevation (in feet) that would occur from the worst-case hurricane surge within each polygon for hurricane categories 1 through 4, and also for scenarious where the peak hurricane surge arrived coincident with 1) mean tide, and 2) mean high tide (the antecedent tide level).  The shapefile was in a Geographic NAD 27 horizontal coordinate system.
                              


Process Step
Process Description
                                Projected the source polygon shapefile from Geographic NAD 27 to UTM Zone 19 NAD 83 meters.
                              


Process Step
Process Description
                                Overlaid the SLOSH polygon shapefile on top of a shapefile of the Maine GIS 1:24K coastline, and deleted many of the polygons that fell far offshore, as these were not necessary for further analysis.  The polygons that were important for the creation of a hurricane sure layer were those polygons seaward of the shoreline, but in the immediate vicinity of the shoreline, and those polygons that were landward of the shoreline.
                              


Process Step
Process Description
                                Use XTools to create a point shapfile of the centroids of the polygons.
                              


Process Step
Process Description
                                Created eight point shapefiles from the previous point shapefile, each representing the eight permutations of Category 1 through 4 hurricane surge, and the scenarios of hurricane surge arriving coincident with 1) mean tide, and 2) mean high tide.  Within each of the eight shapefiles, deleted records that contained values of "99.9" for the represented permutation, which represented areas that were not flooded in the SLOSH model runs.
                              


Process Step
Process Description
                                The resulting eight shapefiles covered a large spatial extent - all of coastal Maine.  Therefore, the eight shapefiles were divided into five sub areas along the Maine coast to facilitate interpolation of the points.  This resulted in 40 shapefiles.
                              


Process Step
Process Description
                                Interpolated each of the resulting 40 point shapefiles to produce interpolated raster surfaces (ArcInfo Grids) representing the hurricane surge water elevation for each particular hurricane scenario.  Used IDW interpolation, with the following parameters: power = 2, Search radius type: Variable, Number of points: 6.  Used a cell size of 10 meters to facilitate interpolation, as smaller cell sizes proved to be too computationally intensive.  This resulted in 40 raster grids representing the eight permutations of hurricane category and antecedent tide level, for the five sub areas.  This completed the preparation of the water surface grids.  The next step was to prepare the land surface grids.
                              


Process Step
Process Description
                                Downloaded land surface elevation data from the USGS Seamless Data Distribution System (SDDS).  The downloaded data consisted of the 1/3 arc second National Elevation Dataset.  The data was in ArcInfo Grid format, had vertical units of meters, and was in a Geographic NAD 83 horizontal coordinate system.  Downloaded this data in several pieces due to the size constraints imposed by the SDDS website, and later merged them together (see subsequent process steps) to cover the five sub areas along the Maine coast.
                              


Process Step
Process Description
                                Projected each of the downloaded USGS DEM's from Geographic NAD 83 to UTM Zone 19 NAD 83 meters.
                              


Process Step
Process Description
                                Converted the vertical units of each of the projected DEM Grids from meters to feet by multiplying the Grid "Value" by 3.280839895.
                              


Process Step
Process Description
                                Merged the DEM Grids to create land surface grids that covered each of the five sub areas along the Maine coast.  This completed the preparation of the land surface elevation grids.  The next step was to subtract the land surface grids from the water surface grids to create rasters depicting which areas would and would not be flooded (inundated) by worst-case hurricane surge for each of the two antecedent tide scenarios.  See subsequent process steps.
                              


Process Step
Process Description
                                Created inundation grids or lattices (called ilats here for "inundation lattices") for each of two the antecedent tide conditions (mean tide and mean high tide) and each of the five sub areas (designated a through e) along the Maine coast (for a total of ten inundation grids) by running the following AML (Arc Macro Language) program:

/* Run from D:\MaineHES1204\Inun
/* Run from Grid

setcell 10

/* a
setwindow 343340 4757118 423884 4879210

ilathi_a = con(d:\mainehes1204\slosh\c1hi_a - d:\mainehes1204\dems\dem_a > 0, 1, ~
d:\mainehes1204\slosh\c2hi_a - d:\mainehes1204\dems\dem_a > 0, 2, ~
d:\mainehes1204\slosh\c3hi_a - d:\mainehes1204\dems\dem_a > 0, 3, ~
d:\mainehes1204\slosh\c4hi_a - d:\mainehes1204\dems\dem_a > 0, 4)

ilatmean_a = con(d:\mainehes1204\slosh\c1mean_a - d:\mainehes1204\dems\dem_a > 0, 1, ~
d:\mainehes1204\slosh\c2mean_a - d:\mainehes1204\dems\dem_a > 0, 2, ~
d:\mainehes1204\slosh\c3mean_a - d:\mainehes1204\dems\dem_a > 0, 3, ~
d:\mainehes1204\slosh\c4mean_a - d:\mainehes1204\dems\dem_a > 0, 4)

/* b
setwindow 420525 4833538 475922 4925056

ilathi_b = con(d:\mainehes1204\slosh\c1hi_b- d:\mainehes1204\dems\dem_b> 0, 1, ~
d:\mainehes1204\slosh\c2hi_b- d:\mainehes1204\dems\dem_b> 0, 2, ~
d:\mainehes1204\slosh\c3hi_b- d:\mainehes1204\dems\dem_b> 0, 3, ~
d:\mainehes1204\slosh\c4hi_b- d:\mainehes1204\dems\dem_b> 0, 4)

ilatmean_b= con(d:\mainehes1204\slosh\c1mean_b- d:\mainehes1204\dems\dem_b> 0, 1, ~
d:\mainehes1204\slosh\c2mean_b- d:\mainehes1204\dems\dem_b> 0, 2, ~
d:\mainehes1204\slosh\c3mean_b- d:\mainehes1204\dems\dem_b> 0, 3, ~
d:\mainehes1204\slosh\c4mean_b- d:\mainehes1204\dems\dem_b> 0, 4)

/* c
setwindow 473811 4833891 575376 4973627

ilathi_c= con(d:\mainehes1204\slosh\c1hi_c- d:\mainehes1204\dems\dem_c> 0, 1, ~
d:\mainehes1204\slosh\c2hi_c- d:\mainehes1204\dems\dem_c> 0, 2, ~
d:\mainehes1204\slosh\c3hi_c- d:\mainehes1204\dems\dem_c> 0, 3, ~
d:\mainehes1204\slosh\c4hi_c- d:\mainehes1204\dems\dem_c> 0, 4)
                              


Process Step
Process Description
                                Ran the following aml program to set the nodata values of the raster = "10" prior to running the ArcInfo Grid "Fill" command.

/* Run from D:\MaineHES1204\Inun
/* Run from Grid

setcell 10
setwindow maxof

set10hi_a = con(isnull(ilathi_a), 10, ilathi_a)
set10hi_b = con(isnull(ilathi_b), 10, ilathi_b)
set10hi_c = con(isnull(ilathi_c), 10, ilathi_c)
set10hi_d = con(isnull(ilathi_d), 10, ilathi_d)
set10hi_e = con(isnull(ilathi_e), 10, ilathi_e)

set10mean_a = con(isnull(ilatmean_a), 10, ilatmean_a)
set10mean_b = con(isnull(ilatmean_b), 10, ilatmean_b)
set10mean_c = con(isnull(ilatmean_c), 10, ilatmean_c)
set10mean_d = con(isnull(ilatmean_d), 10, ilatmean_d)
set10mean_e = con(isnull(ilatmean_e), 10, ilatmean_e)
                              


Process Step
Process Description
                                Converted each of the ten inundation grids to polygon shapefiles in preparation of clipping them to the Maine Office of GIS (ME OGIS) 1:24K "METWP" (Maine Townships) polygon shapefile.
                              


Process Step
Process Description
                                Selected polygons from the "METWP" polygon shapefile that intersected the Category 4, Mean High Tide Scenario inundation polygon shapefile, and exported that subset to a new shapefile.  This shapefile constituted the flooding that extended furthest inland out of the ten inundation shapefiles.  Then dissolved the polygons to remove boundaries at town lines.
                              


Process Step
Process Description
                                Clipped each of the ten inundation shapefiles to the subset, dissolved version of "METWP" polygon shapefile.
                              


Process Step
Process Description
                                Converted each of the ten clipped polygon inundation shapefiles into rasters (grids).
                              


Process Step
Process Description
                                Ran the following AML program to set the nodata values of the rasters (which after the clip are the values seaward of the coastline) = "0" prior to running the ArcInfo Grid "Fill" command.

/* Run from D:\MaineHES1204\Inun
/* Run from Grid

setcell 10
setwindow maxof

set0hi_a = con(isnull(cliphi_a), 0, cliphi_a)
set0hi_b = con(isnull(cliphi_b), 0, cliphi_b)
set0hi_c = con(isnull(cliphi_c), 0, cliphi_c)
set0hi_d = con(isnull(cliphi_d), 0, cliphi_d)
set0hi_e = con(isnull(cliphi_e), 0, cliphi_e)

set0mean_a = con(isnull(clipmean_a), 0, clipmean_a)
set0mean_b = con(isnull(clipmean_b), 0, clipmean_b)
set0mean_c = con(isnull(clipmean_c), 0, clipmean_c)
set0mean_d = con(isnull(clipmean_d), 0, clipmean_d)
set0mean_e = con(isnull(clipmean_e), 0, clipmean_e)
                              


Process Step
Process Description
                                Ran the ArcInfo Grid "Fill" command to fill any "sinks" or depressions in the inundation grids.  These would occur in areas that are low, but which have higher ground between their location and the coast which would prevent coastal surge from reaching the area.  In previous process steps, the land areas were set to "10", and ocean and river areas were set to "0".  In between, the inundation was coded as 1 thorugh 4 according to hurricane category.  Therefore, the "Fill" command ensures that all flooding "flows" from high ground to low ground, or from 10 to 4, 3, 2, 1, and 0.  The AML program is below.

/* Run from D:\MaineHES1204\Inun
/* Run from Grid

setcell 10

fill set0hi_a fillhi_a sink
fill set0hi_b fillhi_b sink
fill set0hi_c fillhi_c sink
fill set0hi_d fillhi_d sink
fill set0hi_e fillhi_e sink

fill set0mean_a fillmean_a sink
fill set0mean_b fillmean_b sink
fill set0mean_c fillmean_c sink
fill set0mean_d fillmean_d sink
fill set0mean_e fillmean_e sink
                              


Process Step
Process Description
                                Ran the following AML program to set the areas that had been set to "0" or "10" prior to the filling operation back to "nodata".

/* Run from D:\MaineHES1204\Inun
/* Run from Grid

setcell 10

finalhi_a = setnull(fillhi_a == 10 or fillhi_a == 0, fillhi_a)
finalhi_b = setnull(fillhi_b == 10 or fillhi_b == 0, fillhi_b)
finalhi_c = setnull(fillhi_c == 10 or fillhi_c == 0, fillhi_c)
finalhi_d = setnull(fillhi_d == 10 or fillhi_d == 0, fillhi_d)
finalhi_e = setnull(fillhi_e == 10 or fillhi_e == 0, fillhi_e)

finalmean_a = setnull(fillmean_a == 10 or fillmean_a == 0, fillmean_a)
finalmean_b = setnull(fillmean_b == 10 or fillmean_b == 0, fillmean_b)
finalmean_c = setnull(fillmean_c == 10 or fillmean_c == 0, fillmean_c)
finalmean_d = setnull(fillmean_d == 10 or fillmean_d == 0, fillmean_d)
finalmean_e = setnull(fillmean_e == 10 or fillmean_e == 0, fillmean_e)
                              


Process Step
Process Description
                                Merged the five inundation grids (a through e) for the Mean Tide scenario together to form one inundation grid that covered all of coastal Maine for the Mean Tide Scenario.  Merged the five inundation grids (a through e) for the Mean High Tide scenario together to form one inundation grid that covered all of coastal Maine for the Mean High Tide Scenario.  Used the ArcInfo Workstation Grid command "merge" to do this.  This resulted in one inundation grid for the Mean Tide Scenario and one inundation grid for the Mean High Tide Scenario.
                              


Process Step
Process Description
                                Converted the two inundation grids to polygon shapefiles called hurrsurge_mt for "Hurricane Surge - Mean Tide scenario" and hurrsurge_mht (Hurricane Surge - Mean High Tide scenario").  This completed the preparation of the two Hurricane Surge Inundation shapefiles.
                              


Process Contact
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Army Corps of Engineers, New England District
Contact PositionGeospatial Data and Systems Point of Contact
Contact Address
Address Typemailing and physical address
Address696 Virginia Road
CityConcord
State or ProvinceMA
Postal Code01742
CountryUNITED STATES

Contact Voice Telephone978-318-8647
Contact Facsimile Telephone978-318-8080

Process Step
Process Description
                                Metadata imported.
                              
Source Used Citation Abbreviation
U:\projects\metadata\updated\datasets\hurr_surge_inun_MT.xml


Process Step
Process Description
                                Dataset copied.
                              
Source Used Citation Abbreviation
Server=gisdatabase; Service=esri_vector; User=sdeuser; Version=SDE.DEFAULT
Process Date2011-05-10
Process Time08:33:44


Cloud Cover0


Spatial Reference 

Horizontal Coordinate System Definition
Planar
Planar Coordinate Information
Planar Coordinate Encoding MethodCoordinate Pair
Coordinate Representation
Abscissa Resolution0.000512
Ordinate Resolution0.000512
Planar Distance Unitsm

Geodetic Model
Horizontal Datum NameNorth American Datum of 1983
Ellipsoid NameGeodetic Reference System 80
Semi-major Axis6378137
Denominator of Flattening Ratio298.257

Vertical Coordinate System Definition
Altitude System Definition
Altitude Datum NameNational Geodetic Vertical Datum of 1929
Altitude Resolution1.000000
Altitude Distance Unitsfeet
Altitude Encoding MethodExplicit elevation coordinate included with horizontal coordinates

Entities and Attributes 

Detailed Description
Entity Type
Entity Type LabelHurr_Surge_Inun_MT
Entity Type Definition
polygon feature class
Entity Type Definition SourceEnvironmental Systems Research Institute, Inc. (ESRI)

Attribute
Attribute LabelOBJECTID
Attribute Definition
Internal feature number.
Attribute Definition SourceESRI
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

Attribute
Attribute LabelCATEGORY
Attribute Definition
Feature geometry.
Attribute Definition SourceEsri
Attribute Domain Values
Unrepresentable Domain
Coordinates defining the features.

Attribute
Attribute LabelSHAPE
Attribute Definition
Feature geometry.
Attribute Definition SourceESRI
Attribute Domain Values
Unrepresentable Domain
Coordinates defining the features.

Attribute
Attribute LabelSHAPE.AREA

Attribute
Attribute LabelSHAPE.LEN

Attribute
Attribute LabelCategory
Attribute Definition
Hurricane Category associated with the hurricane surge limit of that polygon
Attribute Definition SourceNational Hurricane Center SLOSH Model

Overview Description
Entity and Attribute Overview
                            Each polygon is assigned a category number, which indicates the hurricane category, according to the Saffir-Simpson scale, at which the area would be flooded by hurricane surge.
                          
Entity and Attribute Detail Citation
                            Each polygon contains a hurricane category ranging from 1 to 4, according to the Saffir-Simpson scale.

The  ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt.  In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.
                          

Distribution Information 1 

Distributor
Contact Information
Contact Organization Primary
Contact Organization(MEGIS) Maine Office of Geographic Information Systems
Contact PersonGIS Coordinator
Contact PositionGIS Coordinator
Contact Address
Address Typemailing address
AddressState House Station 174
CityAugusta
State or ProvinceME
Postal Code04333-0174
CountryUNITED STATES

Contact Voice Telephone207 624-7700
Contact Facsimile Telephone207 287-3842
Hours of ServiceMonday through Friday 0800 - 1700 EST

Resource Descriptionhttp://megis.maine.gov/catalog/
Distribution Liability
                        Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
                      
Standard Order Process
Digital Form
Digital Transfer Information
Format NameESRI Shapefile
Format Version NumberARC Version 9.x
Format Specification
ArcView Shapefile Format
Format Information Content
MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.
File Decompression TechniqueData available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/.

Digital Transfer Option
Online Option
Access Instructions
                                        These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog - http://megis.maine.gov/catalog/


Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/

If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) - www.esri.com

See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
                                      
FeesData may be downloaded from Maine GIS Internet Data Catalog at no charge.
TurnaroundData is available for immediate download from the Maine GIS Internet Data Catalog.


Technical Prerequisites
If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) http://www.esri.com/ You may also see http://megis.maine.gov/links/ for a link to ArcExplorer 9.x
Available Time Period
Time Period Information
Range of Dates/Times
Beginning Date2005-12-01
Ending DatePresent


Distribution Information 2 

Distributor
Contact Information
Contact Organization Primary
Contact OrganizationMaine Office of Geographic Information Systems
Contact PositionGIS Coordinator
Contact Address
Address Typemailing address
AddressState House Station 174
CityAugusta
State or ProvinceME
Postal Code04333-0174
CountryUNITED STATES

Contact Voice Telephone(207) 624-7700
Contact Facsimile Telephone(207) 287-3842
Hours of ServiceMonday through Friday 0800 - 1700 EST

Distribution Liability
                        Users must assume responsibility to determine the usability of this data for their purposes.
                      
Standard Order Process
Digital Form
Digital Transfer Information
Format NameARCSDE
Format Version NumberArcSDE 9.x
Format Information Content
Oracle 9i

Digital Transfer Option
Online Option
Access Instructions
                                        Please contact the Maine Office of GIS (MEGIS) for access instructions.
                                      
FeesAccess is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login.


Metadata Reference 

Metadata Date2005-09-08
Metadata Review Date2010-01-14
Metadata Contact
Contact Information
Contact Organization Primary
Contact OrganizationU.S. Army Corps of Engineers, New England District
Contact PersonREQUIRED: The person responsible for the metadata information.
Contact PositionGeospatial Data and Systems Point of Contact
Contact Address
Address Typemailing and physical address
Address696 Virginia Road
CityConcord
State or ProvinceMA
Postal Code01742
CountryUNITED STATES

Contact Voice Telephone978-318-8647
Contact Facsimile Telephone978-318-8080

Metadata Standard NameFGDC Content Standards for Digital Geospatial Metadata
Metadata Standard VersionFGDC-STD-001-1998
Metadata Time Conventionlocal time


Metadata Access Constraintsnone
Metadata Use Constraints
none