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NOAA Nautical Charts

Tags
ImageryBaseMapsEarthCover


Summary

To plot NOAA charts on maps.

Description

This image catalog shows the NOAA nautical charts for any given area. Like other image catalogs, it is really just a pointer to the chart images stored in z:\images. These NOAA charts are converted from the MapTech BSB format.

Credits

Use limitations

Extent

Scale Range

ArcGIS Metadata 

Topics and Keywords 

Themes or categories of the resource  imageryBaseMapsEarthCover


Theme keywords  ImageryBaseMapsEarthCover

Thesaurus
Title ISO Keyword Thesaurus-Theme




Citation 

Title NOAA Nautical Charts
Publication date 2001-01-01
Indeterminate time unknown


Presentation formats  digital document
FGDC geospatial presentation format  tabular digital data


Citation Contacts 

Responsible party
Organization's name MDEP
Contact's role  originator


Resource Details 

Dataset languages  English


Status  completed


Processing environment Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850


Extents 

Extent
Geographic extent
Bounding rectangle
West longitude -71
East longitude -66.5
South latitude 42.5
North latitude 45.5

Extent
Description
publication date
Temporal extent
Date and time 2001-01-01

Resource Maintenance 

Resource maintenance
Update frequency  as needed


Data Quality 

Lineage 

Process step
When the process occurred 2000-12-20
Description Methods for conversion of NOAA nautical charts to TIFF images Overview - the basic process was to convert the BSB charts from MapTech into ArcInfo grids using the ChartViewer extension from NOAA and Spatial Analyst extension from ESRI in ArcView 3.2a. The grids were then reprojected to UTM, borders were clipped, and colors were matched before converting to TIFFS. Three sets of TIFFs were made, the unclipped charts in UTM NAD83, the clipped charts in UTM NAD83, and the clipped charts in UTM NAD27 (for the Coast Guard). DETAILS Conversion - We got the newest BSB-format NOAA charts from MapTech, Edition 3.0, Region 2 (Block Island, RI to Canadian border). I copied these to a local drive on the Dell server. I then downloaded the BSB ChartViewer extension from NOAA's website: http://www.csc.noaa.gov/products/chartview/ and installed in on the Dell server, which was running ArcView 3.2a. I also installed ESRI's Spatial Analyst 1.1. on this server. Then, for each of the 58 charts in Maine waters, I added it to ArcView with the ChartViewer and saved it as a grid with Spatial Analyst. Projection - As I converted each chart, I checked to ensure they all had a consistent projection system. This was for the most part true, all were in a Mercator projection. However, the latitude of true scale varied between charts based on their location. I recorded each chart's latitude of true scale, and then coded an AML to run through and define each chart's projection in its corresponding grid. Then, I coded another AML to go through and reproject each grid to UTM with the following projection parameters: projection utm zone 19 units meters datum nad83 spheroid grs80 For the record, the Mercator projection used with these charts was based on the NAD83/WGS84 datum. A second set of grids was created with the same UTM parameters above, except datum nad27, spheroid clarke1866. Clipping - Once I had a complete set of charts as UTM grids, I coded an AML to run through each grid, clip it to the boundaries of the chart, and convert any NODATA cells to values of 2 (white). This operation was: grids_clip_83\g%quad% = con(isnull(selectpolygon(grids_utm\g%quad%, tempcov, / inside)), 2, selectpolygon(grids_utm\g%quad%, tempcov, inside)) The boundaries of each chart were taken from an ArcInfo coverage, which was on-screen digitized using the charts themselves. The coverage from the earlier charts was not used because it didn't line up. Also, the dates of the charts were added to this coverage. An export file (.e00) of this coverage is on the CD-ROM(s). Colormapping - I found that most charts had inconsistent color maps. The result was that I had to go through each chart and create an individual color map. I first recorded a consistent set of colors to be used in all charts, then checked each chart's grid in ArcMap to see what values related to the various features. The colors used are: Feature Color R G B Comment Text Black 0 0 0 Open water White 255 255 255 Coastal water Light Blue 215 225 235 Mid-water Lighter Blue 240 245 255 Not on all charts Land Khaki 240 220 190 Towns Darkest Khaki 175 160 130 Only on Canadian charts Intertidal Olive 200 200 175 Navigational Purple 175 105 235 Green buoys Forest Green 70 160 0 Bathymetry Aqua 0 205 255 On most charts, also Loran "W" Bathymetry 70% Gray 80 80 80 On few charts Shipping lanes Pink 240 195 255 On small-scale charts Boundary water 30% Gray 180 180 180 International water boundary Canada charts Medium Khaki 190 175 145 Only on Canadian charts Regulatory area Steel Blue 100 180 255 NWR's, parks, etc. Cleared areas Pale Green 200 255 215 Casco Bay charts Loran "Y" 50% Gray 110 110 110 On small-scale charts Colormap files were created for each grid with the appropriate RGB values, then converted to TIFFs. The .cmp files are on the CD-ROM(s). Conversion - All grids were then converted to TIFFs using the Arc GRIDIMAGE command, with the appropriate .cmp file, and compressed with packbits compression. LZW was not used so that the images could be utilized in ArcView (which doesn't support LZW compression). CD-ROM - The TIFF images, along with supporting files, were written to CD-ROM by the GIS Unit. Three sets were created - unclipped images in UTM NAD83, clipped images in UTM NAD83, and clipped images in UTM NAD27.


Process contact
Individual's name Michael Smith
Organization's name Maine Office of GIS
Contact's position State GIS Manager
Contact's role  processor


Contact information
Phone
Voice 207-215-5530

Address
Type postal
Delivery point State House Station #174
City Augusta
Administrative area Maine
Postal code 04333
Country US
e-mail addressmichael.smith@maine.gov





Process step
When the process occurred 2000-01-01
Description To create a catalog of the converted TIFF images, I wrote an AML to loop through all the images, capture their extent using [SHOW MAPEXTENT], and write that to a text file. The text file was converted to DBF in Excel, and imported into SDE as this catalog.


Process contact
Individual's name Michael Smith
Organization's name Maine Office of GIS
Contact's position State GIS Manager
Contact's role  processor


Contact information
Phone
Voice 207-215-5530
Fax 207-624-3842

Address
Type postal
Delivery point State House Station #174
City Augusta
Administrative area Maine
Postal code 04333
Country US
e-mail address michael.smith at maine.gov





Distribution 

Distributor
Ordering process

Transfer options
Online source
Locationhttp://www.maine.gov/geolib/wms.htm
Description  The Maine Office of GIS and the GeoLibrary Board provide web mapping services to distribute aerial photos and other digital data. A WMS is not a web application which you can see in a web browser; rather, it requires you to add the service to a GIS software application.



Fields 

Details for object  
Field NOAA_Nautical_Chart_Catalog
 
Field description
Attribute table
Description source
ESRI


Field IMAGE
 
Field description
Actual location of the image
Description source
ESRI


Field XMIN
 
Field description
minimum x coordinate of the image
Description source
ESRI


Field YMIN
 
Field description
minimum y coordinate of the image
Description source
ESRI


Field XMAX
 
Field description
maximum x coordinate for the image
Description source
ESRI


Field YMAX
 
Field description
maximum y coordinate for the image
Description source
ESRI


Field OBJECTID
 
Field description
Internal SDE ID
Description source
ESRI




Metadata Details 

Metadata language English
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset


ArcGIS metadata properties
Metadata format ArcGIS 1.0


Last modified in ArcGIS for the item 2010-03-31 12:09:02



Metadata Contacts 

Metadata contact
Organization's name Maine DEP GIS Unit
Contact's position GIS Manager
Contact's role  point of contact


Contact information
Address
Type postal
Delivery point State House Station #17
City Augusta
Administrative area Maine
Postal code 04333
Country US



Thumbnail and Enclosures 

Enclosure
Enclosure type  File
Description of enclosure original metadata
Original metadata document, which was translated yes
Source metadata format fgdc

FGDC Metadata (read-only) 

Identification 

Citation
Citation Information
OriginatorMDEP
Publication Date2001
Publication TimeUnknown
Title
NOAA Nautical Charts
Geospatial Data Presentation Formtabular digital data

Description
Abstract
                            This image catalog shows the NOAA nautical charts for any given area.  Like other image catalogs, it is really just a pointer to the chart images stored in z:\images.  These NOAA charts are converted from the MapTech BSB format.
                          
Purpose
                            To plot NOAA charts on maps.
                          
Time Period of Content
Time Period Information
Single Date/Time
Calendar Date2001
Currentness Reference
                            publication date
                          
Status
ProgressComplete
Maintenance and Update FrequencyAs needed

Spatial Domain
Bounding Coordinates
West Bounding Coordinate-71.0
East Bounding Coordinate-66.5
North Bounding Coordinate45.5
South Bounding Coordinate42.5

Keywords
Theme
Theme Keyword ThesaurusISO Keyword Thesaurus-Theme
Theme KeywordImageryBaseMapsEarthCover

Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850

Data Quality 

Lineage
Process Step
Process Description
                                Methods for conversion of NOAA nautical charts to TIFF images

        Overview - the basic process was to convert the BSB charts from
        MapTech into ArcInfo grids using the ChartViewer extension from
        NOAA and Spatial Analyst extension from ESRI in ArcView 3.2a.
        The grids were then reprojected to UTM, borders were clipped,
        and colors were matched before converting to TIFFS.  Three sets
        of TIFFs were made, the unclipped charts in UTM NAD83, the clipped
        charts in UTM NAD83, and the clipped charts in UTM NAD27 (for the
        Coast Guard).

        DETAILS

        Conversion - We got the newest BSB-format NOAA charts from MapTech,
        Edition 3.0, Region 2 (Block Island, RI to Canadian border).  I
        copied these to a local drive on the Dell server.  I then downloaded
        the BSB ChartViewer extension from NOAA's website:
        http://www.csc.noaa.gov/products/chartview/
        and installed in on the Dell server, which was running ArcView 3.2a.
        I also installed ESRI's Spatial Analyst 1.1. on this server.  Then,
        for each of the 58 charts in Maine waters, I added it to ArcView
        with the ChartViewer and saved it as a grid with Spatial Analyst.

        Projection - As I converted each chart, I checked to ensure they all
        had a consistent projection system.  This was for the most part true,
        all were in a Mercator projection.  However, the latitude of true scale
        varied between charts based on their location.  I recorded each chart's
        latitude of true scale, and then coded an AML to run through and define
        each chart's projection in its corresponding grid.  Then, I coded another
        AML to go through and reproject each grid to UTM with the following
        projection parameters:
        projection utm
        zone 19
        units meters
        datum nad83
        spheroid grs80
        For the record, the Mercator projection used with these charts was based
        on the NAD83/WGS84 datum.
        A second set of grids was created with the same UTM parameters above, except
        datum nad27, spheroid clarke1866.

        Clipping - Once I had a complete set of charts as UTM grids, I coded an
        AML to run through each grid, clip it to the boundaries of the chart,
        and convert any NODATA cells to values of 2 (white).  This operation was:
        grids_clip_83\g%quad% = con(isnull(selectpolygon(grids_utm\g%quad%, tempcov, /
        inside)), 2, selectpolygon(grids_utm\g%quad%, tempcov, inside))
        The boundaries of each chart were taken from an ArcInfo coverage, which was
        on-screen digitized using the charts themselves.  The coverage from the
        earlier charts was not used because it didn't line up.  Also, the dates of
        the charts were added to this coverage.  An export file (.e00) of this coverage
        is on the CD-ROM(s).

        Colormapping - I found that most charts had inconsistent color maps.  The result
        was that I had to go through each chart and create an individual color map.  I
        first recorded a consistent set of colors to be used in all charts, then checked
        each chart's grid in ArcMap to see what values related to the various features.
        The colors used are:
        Feature		Color		R	G	B	Comment
        Text		Black		0	0	0
        Open water	White		255	255	255
        Coastal water	Light Blue	215	225	235
        Mid-water	Lighter Blue	240	245	255	Not on all charts
        Land		Khaki		240	220	190
        Towns		Darkest Khaki	175	160	130	Only on Canadian charts
        Intertidal	Olive		200	200	175
        Navigational	Purple		175	105	235
        Green buoys	Forest Green	70	160	0
        Bathymetry	Aqua		0	205	255	On most charts, also Loran "W"
        Bathymetry	70% Gray	80	80	80	On few charts
        Shipping lanes	Pink		240	195	255	On small-scale charts
        Boundary water	30% Gray	180	180	180	International water boundary
        Canada charts	Medium Khaki	190	175	145	Only on Canadian charts
        Regulatory area Steel Blue	100	180	255	NWR's, parks, etc.
        Cleared areas	Pale Green	200	255	215	Casco Bay charts
        Loran "Y"	50% Gray	110	110	110	On small-scale charts
        Colormap files were created for each grid with the appropriate RGB values, then
        converted to TIFFs.  The .cmp files are on the CD-ROM(s).

        Conversion - All grids were then converted to TIFFs using the Arc GRIDIMAGE command,
        with the appropriate .cmp file, and compressed with packbits compression.  LZW was
        not used so that the images could be utilized in ArcView (which doesn't support LZW
        compression).

        CD-ROM - The TIFF images, along with supporting files, were written to CD-ROM by
        the GIS Unit.  Three sets were created - unclipped images in UTM NAD83, clipped
        images in UTM NAD83, and clipped images in UTM NAD27.
                              
Process Date2000-12-20


Process Contact
Contact Information
Contact Person Primary
Contact PersonMichael Smith
Contact OrganizationMaine Office of GIS
Contact PositionState GIS Manager
Contact Address
Address Typemailing address
AddressState House Station #174
CityAugusta
State or ProvinceMaine
Postal Code04333
CountryUNITED STATES

Contact Voice Telephone207-215-5530
Contact Electronic Mail Addressmichael.smith@maine.gov

Process Step
Process Description
                                To create a catalog of the converted TIFF images, I wrote an AML to loop through all the images, capture their extent using [SHOW MAPEXTENT], and write that to a text file.

The text file was converted to DBF in Excel, and imported into SDE as this catalog.
                              
Process Date2000


Process Contact
Contact Information
Contact Person Primary
Contact PersonMichael Smith
Contact OrganizationMaine Office of GIS
Contact PositionState GIS Manager
Contact Address
Address Typemailing address
AddressState House Station #174
CityAugusta
State or ProvinceMaine
Postal Code04333
CountryUNITED STATES

Contact Voice Telephone207-215-5530
Contact Facsimile Telephone207-624-3842
Contact Electronic Mail Addressmichael.smith at maine.gov

Spatial Reference 

Horizontal Coordinate System Definition
Planar
Grid Coordinate System
Grid Coordinate System NameUniversal Transverse Mercator
Universal Transverse Mercator
UTM Zone Number19

Planar Coordinate Information
Planar Coordinate Encoding Methodcoordinate pair
Planar Distance Unitsmeters

Geodetic Model
Horizontal Datum NameNorth American Datum of 1983
Ellipsoid NameGeodetic Reference System 80

Entities and Attributes 

Distribution Information 

Standard Order Process
Digital Form
Digital Transfer Option
Online Option
Computer Contact Information
Network Address
Network Resource Namehttp://www.maine.gov/geolib/wms.htm

Access Instructions
                                        The Maine Office of GIS and the GeoLibrary Board provide web mapping services to distribute aerial photos and other digital data. A WMS is not a web application which you can see in a web browser; rather, it requires you to add the service to a GIS software application.
                                      

Metadata Reference 

Metadata Date2010-03-31
Metadata Contact
Contact Information
Contact Organization Primary
Contact OrganizationMaine DEP GIS Unit
Contact PositionGIS Manager
Contact Address
Address Typemailing address
AddressState House Station #17
CityAugusta
State or ProvinceMaine
Postal Code04333
CountryUNITED STATES


Metadata Standard NameFGDC Content Standards for Digital Geospatial Metadata
Metadata Time Conventionlocal time


Metadata Access Constraintsnone
Metadata Use Constraints
none