Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey (USGS) EROS Data Center (EDC) Publication_Date: 19970514 Title: USGS DOQQs 1996-1998.lyr Geospatial_Data_Presentation_Form: WMS Series_Information: Series_Name: USGS Aerial Photography Issue_Identification: Digital Orthophoto Quadrangles Publication_Information: Publication_Place: Menlo Park, CA USA Publisher: U.S. Geological Survey U.S. Geological Survey Other_Citation_Details: 1:12000 A digital orthophoto is a computer-generated image of an aerial photograph in which the image displacement caused by terrain relief and camera tilt has been removed. A digital orthophoto can be incorporated into any geographic information system (GIS) that can manipulate raster images. It can function as a cartographic base for displaying, generating, and modifying associated digital planimetric data. Other applications include vegetation and timber management, routing and habitat analysis, environmental impact assessments, emergency evacuation planning, flood analysis, soil erosion assessment, facility management, and groundwater and watershed analysis. The accuracy and extraordinary detail provided by the digital orthophoto allow users to evaluate their data for accuracy and completeness, make real-time modifications to their data, and even generate new files. DOQQ is a mosaic of digital orthophoto quarter quadrangles stored in a Maine Office of Geographic Information Systems (MEGIS) Oracle/ArcSDE environment. The digital orthophoto quarter quadrangles that form the mosaic are available for download from the Maine GIS Internet Data Catalog in compressed MrSID format in 7.5 minute quadrangle map extent. Compression with LizardTech's MrSID software creates two files a .sid image and an .sdw file georeferencing file, approximate size of the download is 12MB, one sixteenth of the uncompressed DOQQ image. Online_Linkage: http://mapserver.maine.gov/wms/mapserv.exe?map=c:/wms/orthos.map& Description: Abstract: This is an OGC-compliant web mapping service (WMS) which provides the 1996-1998 USGS DOQQs for Maine. The service is a mosaic of digital orthophoto quarter quadrangles stored as MrSID-compressed images and served out via WMS. Digital orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophoto is a 1-meter ground resolution, quarter-quadrangle, a digital orthophoto quarter quadrangle (DOQQ) (3.75 minutes of latitude by 3.75 minutes of longitude) image cast on the Universal Transverse Mercator projection (UTM) on the North American Datum of 1983 (NAD83).The geographic extent of the DOQQ is equivalent to a quarter-quadrangle plus the overedge ranges from a minimum of 50 meters to a maximum of 300 meters beyond the extremes of the primary and secondary corner points. The overedge is included to facilitate tonal matching for mosaicking and for the placement of the NAD83 and secondary datum corner ticks. The normal orientation of data is by lines (rows) and samples (columns). Each line contains a series of pixels ordered from west to east with the order of the lines from north to south. The radiometric image brightness values are stored as 256 gray levels, ranging from 0 to 255. The standard, uncompressed gray scale DOQQ format contains an ASCII header followed by a series of 8-bit image data lines. Purpose: DOQQs serve a variety of purposes, from interim maps to field references for Earth science investigations and analysis. The digital orthophoto is useful as a layer of a geographic information system and as a tool for revision of digital line graphs and topographic maps. Supplemental_Information: Information in this document was drawn, compiled and modified to fit this data presentation from: USGS. 1998. Metadata for Digital Orthophoto Quadrangles. September 28, 1998, Reston VA. For more information see: http://mac.usgs.gov/. Dataset searching and ordering capabilities are available through EarthExplorer at URL http://earthexplorer.usgs.gov . Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1996 Ending_Date: 1998 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.3 East_Bounding_Coordinate: -66.8 North_Bounding_Coordinate: 47.6 South_Bounding_Coordinate: 42.9 Keywords: Theme: Theme_Keyword_Thesaurus: ISO Keyword Thesaurus Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: Maine GIS Thesaurus-Theme Theme_Keyword: ortho-rectified digital image Place: Place_Keyword_Thesaurus: Maine GIS Thesaurus-Place Place_Keyword: Maine Place_Keyword: United States Stratum: Stratum_Keyword_Thesaurus: GCMD Parameter Keyword Stratum_Keyword: land surface Access_Constraints: This presentation is available to any client which can consume WMS. Use_Constraints: None. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 Hours_of_Service: Monday through Friday 0800 - 1700 EST Data_Set_Credit: Acknowledgement of the U.S. Geological Survey is appreciated in products derived from these data Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850 Data_Quality_Information: Logical_Consistency_Report: DOQQs in this data layer have flight dates between 5/7/1996 and 6/10/1999, with the exception of the following that are covered by photodates of an earlier vintage: Wild River NE, SE and Chatham NE,SE quarter quadrangles 5/8/1993 , Isles of Shoals NW and Portsmouth SE,SW quarter quadrangles 4/29/1992 , and Richmond NW,SW quarter quadrangles 6/20/1991. Kittery NE was flown 5/3/2000. Full description of quarter quadrangles and DOQQ flight dates are available in comma delimited text, and .dbf format, on the MEGIS Data Catalog at http://megis.maine.gov/catalog/ "Tables" link medoqmeta.zip. Completeness_Report: DOQQs are available for all of Maine for this time period, with the exception of an area of northwestern Maine covered by 90 USGS quadrangles. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy and quality of DOQQs must meet National Map Accuracy Standards at 1:12,000 scale for 3.75-minute quarter quadrangles, plus or minus 33.33 feet or 10 meters. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 10 Horizontal_Positional_Accuracy_Explanation: Accuracy and quality depend on the following: photographs that meet National Aerial Photography Program standards, which are quarter-quadrangle centered. The photographs are exposed at a flying height of 20,000 feet above mean terrain; a DEM with the same area coverage as the digital orthophoto and that is equal to or better than a level 1 USGS DEM having a root-mean-square error in elevation no greater than 7 meters; a highly accurate image-scanning process that uses a scanning aperture between 7.5 and 32 micrometers. A 1:40,000-scale image scanned with a 25 micrometer aperture produces a ground sample distance of approximately 1 meter; and identifiable ground control positions with coordinates acquired from ground surveys or aerotriangulation. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The DOQQ accuracy depend, in part, on the accuracy of the data inputs to the rectification process. These inputs include digital elevation models (DEM). Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 7 Vertical_Positional_Accuracy_Explanation: Digital elevation models (DEM) with the same area coverage as the digital orthophoto are used in the photo recitification process. DEM specifications for the DOQQ product require DEMs equal to or better than a level 1 USGS DEM having a root-mean-square error in elevation no greater than 7 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey (USGS) Publication_Date: 19790701 Publication_Time: Unknown Title: (30MDEM) 7.5 minute digital elevation model Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: USGS Digital Elevation Models Issue_Identification: 7.5 minute dem Publication_Information: Publication_Place: Reston VA Publisher: U.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_Linkage: http://edc.usgs.gov/glis/hyper/guide/usgs_dem Source_Scale_Denominator: 999999 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19790701 Beginning_Time: unknown Ending_Date: Present Ending_Time: unknown Source_Currentness_Reference: source dates Source_Citation_Abbreviation: 30mdem Source_Contribution: Accuracy and quality of the digital orthophoto depends among other criteria on a DEM with the same area coverage as the digital orthophoto and that is equal to or better than a level 1 USGS DEM having a root-mean-square error in elevation no greater than 7 meters. Process_Step: Process_Description: To produce a digital orthophoto requires (1) a minimum of three ground positions that can be identified on the photograph to be rectified, (2) camera calibration parameters, such as the calibrated focal length and the coordinates of the camera fiducials, (3) a digital elevation model (DEM), and (4) a digital image produced by scanning an aerial photograph with a precise, high-resolution scanner. The digital image is rectified to generate an orthophoto by processing requirements 1 through 3 above for each image picture element (pixel), using rigorous photogrammetric equations on a computer. The finished product is a spatially accurate image with planimetric features represented in their true geographic positions. Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (USGSEROS) Earth Resources Observation Systems Data Center, U.S. Geological Survey Contact_Person: EROS DATA CENTER Contact_Position: DATA CENTER CONTACT Contact_Address: Address_Type: mailing address Address: 47914 252nd Street City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Country: USA Contact_Voice_Telephone: 605-594-6151 888-275-8747 Contact_Facsimile_Telephone: 605-594-6589 Contact_Electronic_Mail_Address: custserv@usgs.gov Process_Step: Process_Description: Compressed images in MrSID format were used to create an OGC-compliant web mapping service, served via MapServer software. Process_Date: 20030613 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 Hours_of_Service: Monday through Friday 0800 - 1700 EST Spatial_Data_Organization_Information: Indirect_Spatial_Reference: 2512 image mosaic of Maine Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 492758 Column_Count: 334280 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 19 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -69.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate Pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: National Geodetic Vertical Datum of 1929 Altitude_Resolution: 1.000000 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 Hours_of_Service: Monday through Friday 0800 - 1700 EST Resource_Description: Online OGC-compliant web mapping service (WMS), available at this URL: http://mapserver.maine.gov/wms/mapserv.exe?map=c:/wms/orthos.map& 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_Name: ARCSDE Format_Version_Number: ArcSDE 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. Fees: None Ordering_Instructions: Access is available via any Internet connection. Turnaround: instant Custom_Order_Process: Data can be downloaded from the USGS seamless server: http://seamless.usgs.gov Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: (MEGIS) Maine Office of Geographic Information Systems Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: (207) 624-7700 Contact_Facsimile_Telephone: (207) 287-3842 Hours_of_Service: Monday through Friday 0800 - 1700 EST Resource_Description: Downloadable Data 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_Name: WMS Format_Version_Number: 1.1 Format_Specification: OpenGIS (OGC) Web Map Service (WMS ) Format_Information_Content: MEGIS has created a web based application for Maine GIS data that adheres to the OpenGIS Consortium (OGC) Web Mapping Specification (WMS 1.1.1) which allows map servers to create and send standard map images over the Web. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://megisims.state.me.us/wmsconnector/com.esri.wms.Esrimap/WMSFramework?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=DOQQ&SRS=EPSG:4326&BBOX=-71.31,42.85,-66.74,47.67&WIDTH=400&HEIGHT=300&FORMAT=image/png&STYLES= Network_Resource_Name: http://megisims.state.me.us/wmsconnector/com.esri.wms.Esrimap/WMSFramework?request=getcapabilities&service=WMS&version=1.1.1 Network_Resource_Name: http://megisims.state.me.us/wmsconnector/com.esri.wms.Esrimap/WMSFramework? Access_Instructions: This metadata document contains embedded URLs that can be used to make OGC WMS 1.1.1 compliant map requests of the framework layers in the Maine GeoLibrary. Fees: None Ordering_Instructions: Currently OGC WMS 1.1.1 access is available for CONTOURS, DOQQ, E911RDS, HYD24L, HYD24P, INDEX_HF, MECNSLND, MEDOQINDEX, MEDOTPUB, MERAIL24, METWP24L, METWP24P, ORTHO_HF, ORTHO_FF, ORTHO_1F, ORTHO_2F, INDEX_FF, INDEX_1F, INDEX_2F, OTRANS. These images are available to the Web and client software for overlay and display of multiple maps using first of the URLS listed above. Access the OGC: WMS Framework "WMT_MS Get Capabilities" in XML using Internet browser or other XML friendly viewer. Metadata_Reference_Information: Metadata_Date: 20090305 Metadata_Review_Date: 20070925 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Maine Office of Geographic Information Systems Contact_Person: REQUIRED: The person responsible for the metadata information. Contact_Position: GIS Coordinator Contact_Address: Address_Type: mailing address Address: State House Station 145 City: Augusta State_or_Province: ME Postal_Code: 04333-0145 Country: USA Contact_Voice_Telephone: 207 624-7700 Contact_Facsimile_Telephone: 207 287-4563 Hours_of_Service: Monday through Friday 0800 - 1700 EST Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile