This data set is China's 1:250000 three-level watershed zoning data in 2002, including three-level watershed zoning boundary, watershed zoning name and watershed code information. It is commonly used national water resources zoning data (water resources zoning is relatively fixed within a period of time with a certain mandatory zoning model, so as to facilitate the adoption of a unified basis for all water conservancy planning in a relatively long period of time This information).
|collect time||2002/01/01 - 2020/01/07|
|data size||825.9 MiB|
National 1:250000 watershed secondary classification data, national DEM data, national water system data
On the basis of 1:25a and 2-level watershed classification data in China, the corresponding DEM information is extracted, and the three-level basins are coded respectively.
Its data integrity, logical consistency, position accuracy, attribute accuracy, edge connection accuracy and current situation all meet the requirements of the relevant technical regulations and standards formulated by the State Bureau of Surveying and mapping, and its quality is excellent and reliable.
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