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The shape file is developed by ESRI, and an ESRI shape file includes a master file, an index file, and an dBASE table. The suffix of the main file is [.shp].

The shape file is developed by ESRI, and an ESRI (Environmental Systems Research Institute) shape file includes a master file, an index file, and an dBASE table. The suffix of the main file is .shp.

The shp file consists of fixed-length headers and subsequent variable-length records. Each variable length record consists of a fixed length recording header and subsequent variable length recording content.

Extended data

The Shapefile format consists of multiple files, and three files are necessary to form a Shapefile. They are ".shp", ".shx" and ".dbf" files.

A set of files that represent the same data should have the same file name prefix. For example, to store geometric and attribute data about a lake, there must be three files, lake.shp,lake.shx and lake.dbf.

The suffix of the "real" Shapefile is shp, but only this file data is incomplete, and the other two must be attached to form a complete set of geographic data.

In addition to these three necessary files, there are eight optional files that can be used to enhance the expression of spatial data. All file names must follow the MS DOS 8.3 file name standard (8 characters for the prefix and 3 characters for the suffix, such as shapefil.shp)

To facilitate compatibility with some older applications, although many new programs can now support long file names. In addition, all files must be in the same directory.

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