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Service Description: These images were created from the 1 meter resolution quad files and mosaiced in ERDAS Imagine to an output resolution of 3 meters. Some counties had black and white portions. Those files are named (countyname)bw.sid (.sdw). Some counties were all black and white, this is due to the photography. File sizes range from 1.5mb to 75mb. DOQQS's were developed from aerial photography taken during the Winters of 1995 and 1996 under US Geological Survey's (USGS) National Aerial Photography Program (NAPP). The NAPP photographs consist of 9 x 9 inch film images scaled at 1:40,000 with each photo centered over one of the four quarters (NE,NW,SW,SE) of a USGS 7.5 minute (1:24,000) topographic map. Four individual NAPP photos are required to completely cover the area of a USGS 7.5 minute topographic map.
To produce a DOQQ, the original 1:40,000 photography is reproduced as a 1:12,000 positive print which is scanned to produce a digital file with a ground resolution of 1 meter. These 1st order files are ortho-rectified and output as geotifs (over 150 MB each) referenced to UTM NAD83 coordinates.
The MARIS staff has mosaiced and projected the geotif files, in sets of four, to create output files in MSTM coordinates that correspond to USGS 7.5 1:24,000 topographic maps. These composite files are compressed using MrSID compression software. The files are stored by blocks designated by degrees of latitude and longitude(for example - 3390 identifies maps with a longitude of 33 degree and longitude of 90 degrees, etc.). Individual file names follow the USGS naming scheme (3390a1c.sid, 3089g3c.sid, etc.) MrSid desiginates the image file as a .sid file with an associated .sdw file as a world geo-reference file. The .sid file is binary while the .sdw file is ASCII. These files are not available in any other format or projection from the MARIS Technical Center.
Map Name: Layers
Legend
All Layers and Tables
Dynamic Legend
Dynamic All Layers
Layers:
Description:
Copyright Text: USGS;MARIS
Spatial Reference:
PROJCS["mstm",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",1300000.0],PARAMETER["Central_Meridian",-89.75],PARAMETER["Scale_Factor",0.9998335],PARAMETER["Latitude_Of_Origin",32.5],UNIT["Meter",1.0]]
Single Fused Map Cache: false
Initial Extent:
XMin: 291170.8043663726
YMin: 1009382.7657411725
XMax: 678047.164099479
YMax: 1605755.9994354271
Spatial Reference: PROJCS["mstm",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",1300000.0],PARAMETER["Central_Meridian",-89.75],PARAMETER["Scale_Factor",0.9998335],PARAMETER["Latitude_Of_Origin",32.5],UNIT["Meter",1.0]]
Full Extent:
XMin: 308756.0934451502
YMin: 1036490.6400000022
XMax: 660461.8750207014
YMax: 1578648.1251765974
Spatial Reference: PROJCS["mstm",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",1300000.0],PARAMETER["Central_Meridian",-89.75],PARAMETER["Scale_Factor",0.9998335],PARAMETER["Latitude_Of_Origin",32.5],UNIT["Meter",1.0]]
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title:
Author:
Comments: These images were created from the 1 meter resolution quad files and mosaiced in ERDAS Imagine to an output resolution of 3 meters. Some counties had black and white portions. Those files are named (countyname)bw.sid (.sdw). Some counties were all black and white, this is due to the photography. File sizes range from 1.5mb to 75mb. DOQQS's were developed from aerial photography taken during the Winters of 1995 and 1996 under US Geological Survey's (USGS) National Aerial Photography Program (NAPP). The NAPP photographs consist of 9 x 9 inch film images scaled at 1:40,000 with each photo centered over one of the four quarters (NE,NW,SW,SE) of a USGS 7.5 minute (1:24,000) topographic map. Four individual NAPP photos are required to completely cover the area of a USGS 7.5 minute topographic map.
To produce a DOQQ, the original 1:40,000 photography is reproduced as a 1:12,000 positive print which is scanned to produce a digital file with a ground resolution of 1 meter. These 1st order files are ortho-rectified and output as geotifs (over 150 MB each) referenced to UTM NAD83 coordinates.
The MARIS staff has mosaiced and projected the geotif files, in sets of four, to create output files in MSTM coordinates that correspond to USGS 7.5 1:24,000 topographic maps. These composite files are compressed using MrSID compression software. The files are stored by blocks designated by degrees of latitude and longitude(for example - 3390 identifies maps with a longitude of 33 degree and longitude of 90 degrees, etc.). Individual file names follow the USGS naming scheme (3390a1c.sid, 3089g3c.sid, etc.) MrSid desiginates the image file as a .sid file with an associated .sdw file as a world geo-reference file. The .sid file is binary while the .sdw file is ASCII. These files are not available in any other format or projection from the MARIS Technical Center.
Subject: 1995-1996 Digital Ortho Quarter Quads
Category:
Keywords: DOQQ,Digital Ortho Quarter Quads
AntialiasingMode: None
TextAntialiasingMode: Force
Supports Dynamic Layers: true
MaxRecordCount: 1000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, geoJSON
Min Scale: 0
Max Scale: 0
Supports Datum Transformation: true
Child Resources:
Info
Dynamic Layer
Supported Operations:
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Identify
QueryDomains
QueryLegends
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