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v.in.arc <alpha> GRASS Reference Manual <alpha> v.in.arc <br /> NAME <br /> v.in.arc - Converts data in ARC/INFO format to GRASS's <br /> vector format, and stores output in the user's current GRASS <br /> mapset. <br /> (GRASS Vector Data Import Program) <br /> SYNOPSIS <br /> v.in.arc <br /> v.in.arc help <br /> v.in.arc [-n] type=name lines_in=name [points_in=name] <br /> [text_in=name] <br /> vector_out=name [idcol=value] [catcol=value] <br /> [attcol=value] <br /> DESCRIPTION <br /> The user may wish to use GRASS programs on data files that <br /> were created by other GISs. To do this, the user must first <br /> convert data files in these systems' formats to GRASS's file <br /> format. Bringing data from other systems into GRASS is <br /> termed file import. Sending GRASS data files out into other <br /> systems' formats is termed file export. <br /> A variety of GRASS programs exist to import and export data <br /> to and from GRASS. The v.in.arc program will convert vector <br /> data in ARC/INFO's "Generate" format to GRASS's vector file <br /> format, and bring it into the user's current GRASS mapset. <br /> The files to be imported to GRASS must first have been <br /> exported from ARC/INFO using the ARC/INFO Ungenerate <br /> command, and may represent either linear features ("line <br /> coverage") or areal features ("polygon coverage"). The <br /> ARC/INFO User's Guide describes how files containing linear <br /> and polygonal features can be exported from ARC/INFO, in a <br /> section detailing the use of the Ungenerate command. <br /> Note: The ARC coverage must be set to single precision <br /> before running Ungenerate. If it is not, first copy it to <br /> another coverage that is set to single precision, then run <br /> Ungenerate. <br /> Once converted with the ARC/INFO Ungenerate command, the <br /> files to be imported into GRASS must be placed in a <br /> directory named arc in the user's current mapset. If the arc <br /> directory does not exist, it must be created (e.g., with the <br /> command mkdir $LOCATION/arc) before copying the ARC-INFO <br /> files to be converted into it. <br /> (v.in.arc can be used to convert ARC-INFO data from other <br /> mapsets as well, since the program searches for the <br /> specified input file names in the arc directories, if any <br /> exist, in the mapsets in the user's current mapset search path.) <br />Page 5 <br />01/03/97 2.03-02 - Lange <br />