![]() The "PERMANENT" mapset usually contains the read-only base maps like the elevation model, while the other locations are readable and writable by their owners. However, data in all mapsets for a given location can be read by anyone (unless prevented by UNIX file permissions). ![]() Users may only select (and thus modify) a mapset that they own (i.e., have created). Technically they are subdirectories under any location. ![]() A MAPSET may be a geographical or thematic subset of the parent LOCATION. You can think of a location as a data library for a region of interest defined by a coordinate reference system.Įvery GRASS session runs under the name of a MAPSET. Every location has a PERMANENT directory which stores some basic information about the whole location, and is a good place to park base files. Common example is ~/user/grassdata LOCATIONĪ LOCATION is some geographic extent of interest that contains data sets that must all be in the same coordinate system. The directory where LOCATIONS are stored.
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