NAME

v.in.dxf - Converts file in DXF format to GRASS vector map.

KEYWORDS

vector, import, DXF, level1

SYNOPSIS

v.in.dxf
v.in.dxf --help
v.in.dxf [-etbfli1] input=name output=name [layers=string[,string,...]] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-e: Ignore the map extent of DXF file
-t: Do not create attribute table
-b: Do not build topology
Advantageous when handling a large number of points
-f: Import polyface meshes as 3D wire frame
-l: List available DXF layers and exit
-i: Invert selection by DXF layers (don’t import layers in list)
-1: Import all objects into one layer
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=name [required]: Path to input DXF file
output=name [required]: Name for output vector map
layers=string[,string,...]: List of DXF layers to import (default: all)

DESCRIPTION

v.in.dxf converts DXF format CAD files to GRASS vector format. The following graphical objects (DXF entities) are supported:

•: point

•: DXF POINT

•: line

DXF LINE
DXF POLYLINE
DXF LWPOLYLINE
DXF ARC
DXF CIRCLE
DXF TEXT

•: face

DXF POLYFACE MESHES
DXF 3DFACE

Table and column names are changed to lowercase characters for easier SQL usage (lowercase table/column names avoid the need to quote them if the attribute table is stored in a SQL DBMS such as PostgreSQL).

The "layer" column will contain the name(s) of the DXF input layer(s). The DXF entity type string will be stored in the "entity" column as uppercase.

The "handle" column can be used to store small bits of data associated with any entity in the DXF file (i.e., entity handle or unique object identifiers in the layer). The entity handle is a "text string of up to 16 hexadecimal digits", which is a 64-bit integer (currently not supported by GRASS database drivers). For text type entities, the text value will be stored in the "label" column of the GRASS vector output map. Neither the "handle" nor "label" column is mandatory.

REFERENCES

AutoCad DXF (from Wikipedia, the free encyclopedia)
DXF References (Autodesk-supplied documentation)

AUTHORS

Original written by Chuck Ehlschlaeger, 6/1989
Revised by Dave Gerdes, 12/1989
US Army Construction Engineering Research Lab

Updated for GRASS 6 and 3D support. Huidae Cho, 3/2006
With minor additions by Benjamin Ducke (Oxford Archaeology), 4/2009

SOURCE CODE

Available at: v.in.dxf source code (history)