Orthorectified Landsat Thematic Mapper Imagery

Output Product Specifications:

· Spectral Bands: All seven Landsat TM bands - 3 visible, 1 NIR, 2 SWIR, and 1 thermal IR,

· Coverage: Single Landsat WRS Path/Row,

· Projection/Datum: UTM / WGS84,

· Pixel size: 28.5 meters,

· Interpolation Method: Nearest Neighbor,

· Absolute Positional Accuracy: 50 meters RMS.

Source (Input) Data:

Imagery:

· Spectral Bands: All seven Landsat TM bands,

· Coverage: Single Landsat WRS Path/Row,

· Projection/Datum: SOM / WGS84,

· Pixel Size: Mixture of 28.5 and 30 meters,

· Interpolation Method: Cubic Convolution,

· Orientation: Path oriented,

· Coverage Date: Scene dependent (nominally 1990 +/- 3 years).

Control:

· Horizontal: Controlled scenes contained 6 to 12 photo-identifiable points with absolute positional accuracy not greater then 15.0 meters RMS.

· Vertical: DTM with 3-arc second postings, where available. Where 3-arc second data not available, GTOPO30 (30-arc second ) digital elevation models are used.

Digital Image Processing:

· Photogrammetric Block Adjustment:
Performed using Earth Satellite Corporation’s proprietary photogrammetric software.

· Orthorectification:
Resampled to a UTM/WGS84 projection using nearest neighbor (i.e. no interpolation).

· Image Enhancements:
The data are spatially and spectrally unenhanced.

Earth Satellite Corporation