Based on the reconnaissance and analysis technology,the 1st grade river
data of Songliao basin is made up of the results and the interpretation
of remote sensing, and the spatial reference (projection and coordinate system)
is Albers. The survey results images are derived and read in software ArcMap,
using a variety of tools for a map and the scale of standard framing way of
interpretation. Finally, the data is interpreted in the vector data.
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