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GRASS 4.1 U.S. Army CERL 2 <br /> v.in.arc <alpha> GRASS Reference Manual <alpha> v.in.arc <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 /> Alternately, the user can type: <br /> v.in.arc <br /> on the command line without program arguments; in this <br /> case, the program will prompt the user for the flag setting <br /> and parameter values in the manner shown below. <br /> In ARC/INFO, three files are used to store polygon data: <br /> 1) a lines file, which contains coordinates of all the area <br /> edge lines; <br /> 2) a label-point file, which contains coordinates of label- <br /> points (each of which has associated with it a unique label- <br /> point ID number). One label-point is associated with each <br /> polygon defined in the lines file; <br /> 3) a label-text file, which associates each label-point ID <br /> number with a category number and category ("attribute") <br /> text. <br /> Linear feature data are stored in two files: <br /> 1) a lines file, which contains geographic coordinates <br /> defining lines, each with a line-ID number; and <br /> 2) a label-text file, which associates each line-ID number <br /> with a category number and attribute text. <br /> These data files are described in further detail below, <br /> under the DATA FILE FORMATS section. <br /> INTERACTIVE MODE <br /> The program will prompt the user for the flag setting and <br /> parameter values if the user does not specify these on the <br /> command line. First, the user will be asked to assign a <br /> name to the vector file to store program output: <br /> VECTOR (DIGIT) FILENAME <br /> Enter 'list' for a list of existing binary vector files <br /> Hit RETURN to cancel request <br /> > <br /> Next, the user is asked to specify the COVERAGE (feature) <br /> type to be imported into GRASS. Valid coverage types are <br /> polygon and line. <br /> COVERAGE TYPE <br /> Enter "polygon" or "line" <br /> Hit RETURN to cancel request <br />Page 7 <br />01/03/97 2.03-02 - Lange <br />