Songliao basin generally refers to the northeast of China. The administrative divisions include Liaoning, Jilin, Heilongjiang provinces, four League (cities) in Eastern the Inner Mongolia Autonomous Region, and the part of Chengde City in Hebei province.
Based on the reconnaissance and analysis technology,the second 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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