# GRASS Help System

## AREA SEARCH AND RESOLUTION

Companies making available digital imagery and other data supply free indexes showing areas of the earth for which data are available. The user must balance data acquisition and storage costs against the extent and resolution of the data desired. Users can request that companies shift standard scenes to include their data, generally for an added fee.

- LANDSAT 7-band TM data have roughly a 30 meter resolution. - LANDSAT 4-band MSS data have roughly an 80 meter resolution. - SPOT 1-band panchromatic data have roughly a 10 meter resolution. - SPOT 3-band data have roughly a 20 meter resolution. - NHAP data have roughly a 5-10 meter resolution.

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Automatically created on: Wed Oct 12 14:08:41 2005