Sub-water basin partitioning method based on DEM (Dynamic Effect Model) data with large data quantity

摘要: The invention discloses a sub-water basin partitioning method based on DEM (Dynamic Effect Model) data with large quantity. Steps of conventional hydrological analysis model is changed, the overall filling process skipped but conducted separated sections to obtain flow direction, then are spliced converging accumulating amount, and hydrology features such as catchment network boundary extracted, so that under condition quantity in range. comprises steps of: firstly, establishing direction databank, extracting section by section, cutting central part data, constructing directions all areas research region into databank; secondly, splicing databank data; thirdly, carrying out network, like. With adoption method, problem ineffective solved, extraction division realized, thus has very important meaning wide application DEM.