How to write the format of electronic topographic map

The following is the format of electronic topographic map:

1, DEM format: DEM is short for DigitalElevationModel, which can be translated into digital elevation model, that is, digital terrain model.

2.TIN format: TIN is the abbreviation of triangular irregular grid, which can be translated into triangular irregular grid.

3.Shapefile format: Shapefile is a widely used GIS vector data format, which can be used to store various types of spatial elements such as points, lines and surfaces.

4.ASCII format: ASCII format is a general text format, which can be used to store various types of data, including terrain elevation data.