Generate DEM using big data in acgis

When DEM is generated in ArcGIS, the data sources used are usually some height points and contour lines. These height points and contour lines are dense and may contain tens of millions or even hundreds of millions of height points and contour lines. If the vector data is used to generate tin, it is generally not feasible, because the maximum number of knots supported during tin generation can only be tens of millions (depending on computer performance, limited by memory ). In addition, the storage of Vector information is also very particular. If you store these vector information in a SHP file, problems often occur (such as the rendering error when loading In ArcMap ). Considering the above problems, we feel that the following method is preferred.

1. Vector information is stored in Geodatabase

Vector information is stored in the geospatial database in a unified coordinate system. Generally, filegeodatabase is used for data concentration.

2. Create terrain in the dataset

3. Use terrain to raster in arctoolbox to convert terrain to a grid, that is, to obtain the required DEM.

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