TruEarth® 15-meter Imagery -- Specifications

TruEarth® 15-meter IMAGERY SPECIFICATIONS.
TruEarth® 15-meter imagery adheres to the most stringent orthorectified satellite imagery standards.

TruEarth® Global 15-meter Natural-color Imagery Specifications
Coverage area:	Nominal global coverage, less Antarctica
Projection:	WGS84 Geographic (Equi-rectangular)
Resolution:	7,200 pixels per degree/0.5 arcsecond per pixel (15 meters per pixel nominal)
Accuracy:	50 meters RMSE (net) nominal
Source imagery:	Uncompressed orthorectified Landsat 7 ETM+ imagery
Cloud cover:	Generally <10% cloud coverage -- some areas such as equatorial and island regions contain higher cloud-cover characteristics
Color balance:	Standard TruEarth® natural-color balance
Imagery structure:	23,135 seamless 1° x 1° tiles
Total dataset size:	3.6TB
Imagery delivery file format:	GeoTIFF, ECW or JPEG2000 geo-referenced image format
Delivery:	Off the shelf

Note: We produced TruEarth® 15-meter imagery using pure uncompressed Landsat 7 source data provided to TerraMetrics by NASA Stennis Space Center. Similar products have been generated using the publicly-released MrSID-compressed source data. MrSID is a lossy-compression scheme that compromises the quality of the resulting product. Products based on lossy-compressed source data exhibit reduced image fidelity that can have a negative impact when used in demanding applications.

Uncompressed source data and the unique TruEarth® natural-color process sets TruEarth® imagery apart from the rest.