OrthoMosaic99.sid.vat
Table
256
OID
OID
OID
4
0
0
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Value
Value
Integer
0
0
0
Count
Count
Integer
0
0
0
OrthoMosaic99.sid(Band_2).vat
Table
256
OID
OID
OID
4
0
0
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Value
Value
Integer
0
0
0
Count
Count
Integer
0
0
0
OrthoMosaic99.sid(Band_3).vat
Table
256
OID
OID
OID
4
0
0
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Value
Value
Integer
0
0
0
Count
Count
Integer
0
0
0
20020827
10451300
FALSE
20261015
10100200
20261015
10100200
1.0
OrthoMosaic99.sid
389400.000000
408600.000000
124200.000000
148200.000000
1
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_Maryland
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.5.0'><WKT>PROJCS["NAD_1983_Maryland",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["Lambert_Conformal_Conic"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-77.0],PARAMETER["Standard_Parallel_1",38.3],PARAMETER["Standard_Parallel_2",39.45],PARAMETER["Latitude_Of_Origin",37.6666666666667],UNIT["Meter",1.0]]</WKT><XOrigin>-36747100</XOrigin><YOrigin>-29091500</YOrigin><XYScale>121236910.21292362</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision></ProjectedCoordinateSystem>
8
FALSE
Wavelet (MG2)
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MrSID
TRUE
continuous
unsigned integer
150000000
5000
0e15d98e099243bb950588cd5cc777a5
Office of the Chief Technology Officer
(202) 727-2277
200 I Street SE
Washington
DC
20003
US
dcgis@dc.gov
8:30 am - 5 pm
GIS Data Coordinator
GIS Data Coordinator
Office of the Chief Technology Officer
20261015
https://imagery.dcgis.dc.gov/dcgis/rest/services/Ortho/Ortho_1995/ImageServer
ArcGIS Image Service
ArcGIS Image Service
https://dcgov.box.com/v/orthophoto1999
MrSID Raster Download (.zip)
WinZip download file containing MrSID.
Image Service
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The true color orthoimages were acquired as part of the DC Geographic Information System (DC GIS) and captured at 1 foot resolution. A companion downloadable mosaic is available as a compressed MrSID format.</SPAN></P></DIV></DIV></DIV>
Aerial Photography (Orthophoto) - 1999
1999-03-01T00:00:00
1999-03-01T00:00:00
1999-03-01T00:00:00
Office of the Chief Technology Officer
(202) 727-2277
200 I Street SE
Washington
DC
20003
US
dcgis@dc.gov
8:30 am - 5 pm
GIS Data Coordinator
GIS Data Coordinator
Office of the Chief Technology Officer
-77.1224
-76.9007
39.0018
38.7855
1
Washington DC
MrSID
aerial photography
orthophoto
Washington DC
District of Columbia
Orthophoto 1999
DC
historic
imagery
The 1999 Orthophoto mosaic available as an ArcGIS Image Service and compressed MrSID format.
Office of the Chief Technology Officer
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This work is licensed under a </SPAN><A href="https://creativecommons.org:443/licenses/by/4.0" target="_blank" STYLE="text-decoration:underline;"><SPAN><SPAN STYLE="text-decoration:underline;">Creative Commons Attribution 4.0 International License</SPAN></SPAN></A><SPAN>. Users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. </SPAN></P></DIV></DIV></DIV>
aerial imagery
washington dc
district of columbia
dc
Office of the Chief Technology Officer
(202) 727-2277
200 I Street SE
Washington
DC
20003
US
dcgis@dc.gov
8:30 am - 5 pm
GIS Data Coordinator
GIS Data Coordinator
Office of the Chief Technology Officer
Esri ArcGIS 13.5.5.57366
1
-77.122373
-76.900716
39.001746
38.785481
Metadata was imported from historic files for the 1999 planimetric project. Exact month and day of aerial capture was not found.
As part of the planimetric data conversion effort, OCTO-GIS acquired orthophotography to compliment the digital data. Originally, the orthophotos were delivered as tiled TIFF images, using the WGIS delivery tiling scheme. However, to serve the needs of a broader user community, OCTO-GIS directed the contractor to generate an orthophoto mosaic. This mosaic was compressed into MrSID format for ease of use. The image contains 20cm pixels.
EDMD acquired new aerial photography of the District of Columbia in the spring of 1999 prior to the emergence of deciduous foliage. Aerial photography was exposed at an altitude of 7,200' AMT using a Wild RC-20 or RC-30 camera system that is equipped with forward motion compensation and a 12" (300mm) focal length lens cone 600'. The flight design developed in 1995 was duplicated. The design calls for an approximate total of 1,000 frames in 24 North-South oriented flight lines. Forward overlap between frames within each flight line was 80%. Sidelap between adjacent flight lines was 48%. Aerial photography was captured in natural color using Kodak Aerocolor negative film type 2445. Aerial photography was not exposed using airborne GPS due to the existence of an existing control network created in 1995.
All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.
1999-01-01T00:00:00
Office of the Chief Technology Officer
(202) 727-2277
200 I Street SE
Washington
DC
20003
US
dcgis@dc.gov
8:30 am - 5 pm
GIS Data Coordinator
GIS Data Coordinator
Office of the Chief Technology Officer
Office of the Chief Technology Officer
EPSG
dataset
2
1
0
389400.000000 124200.000000
389400.000000 148200.000000
408600.000000 148200.000000
408600.000000 124200.000000
399000.000000 136200.000000
96000
0.200000
120000
0.200000
Band_1
255.000000
33.000000
8
Band_2
255.000000
51.000000
8
Band_3
255.000000
46.000000
8