In 1998,
Landsat TM data acquired in August of 1985 and DEM data were employed to
analyze land-cover types in each irrigated tract, Upper Kalmath Basin, Oregon,
Oregon, USA. The training areas of
nine land cover types were drawn on TM composite images by the aid of aerial
photos interpretation and ground truth.
Then, the subscenes of TM images with PCI image processing software
package were classified into nine land cover types. Finally, the classified results derived from TM images were
converted to GIS-based format so that they can be further analyzed with GIS
analysis software. With ARC/INFO and ARCVIEW, data transformation,
registration, overlay, and statistical analysis were conducted in different
analysis stages. According to the
experts' knowledge and ground truth, all nine initial types were merged into
five types (alfalfa, pasture, emergent vegetation, wet meadow, and dry meadow),
which were presented on a final map.
The classified results were used in decision-making in agricultural
planning.
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