- Most plotting programs have an option to create an output file in ESRI generate format (either -a or -g)
- GNU utility programs are used to convert the generate format file to a points, line, or polygon shapefile
- Four output files will be created (*.shp, *.shx, *.dbf, *.prj)
![](../images/shp001.png)
![](../images/shp002.png)
![](../images/shp003.png)
![](../images/shp004.png)
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