USGS 2013 Dallas\Fort Worth 30cm NC Orthoimagery

Date(s): Coverage Availability/Geographic Extent: Footprint: Source(s):
2013 Dallas-Fort Worth US National Grid USGS

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Data Details

Category:
Orthoimagery - Regional
Available Formats: GeoTiff, JPEG 2000
Alternative Data: None
Derivative Data: None
Known Issues: None
Recommended Uses: Basemap
Spatial Reference:

EPSG 26914

Description

This data set consists of 0.3-meter pixel resolution (approximately 1-foot), natural color orthoimages covering the urban area footprint. An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photography with the geometric qualities of a map.

The design accuracy is estimated not to exceed 1.52 meters NSSDA 95% confidence (0.88-meters Root Mean Squared (RMSE) Error XY (0.62 meter RMSE X or Y). Each orthoimage provides imagery over a 1500-meter by 1500-meter block on the ground. There is no image overlap between adjacent files. The projected coordinate system is UTM Zone 14 with a NAD83 datum. The naming convention is based on the U.S. National Grid (USNG), taking the coordinates of the SW corner of the orthoimage."

An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. There is no image overlap between adjacent files.

Supplemental Information

Tile Index: Download File