ImportDLG()

Summary

Imports features from USGS Digital Line Graph files.

 

Syntax

ImportDLG(array filenames, string new_db_name, string layer_type, array options)

 

Argument	Contents
filenames	An array containing the path and file names of the files to import
new_db_name	The path and file name of the new geographic file
layer_type	The type of features to import: "Point", "Line", or "Area"

 

Option	Type	Contents
Edge Snapping	Boolean	Whether to snap tile boundary nodes to better match features across tiles (defaults to "False")
Label	String	A descriptive label for the geographic file
Layer Name	String	The name of the layer in the geographic file
Median Split	Boolean	If "True" special handling insures that entities which cross the 180 degree longitude line are imported properly; if "False" (the default), no special handling is invoked
Node Layer Name	String	The desired name for the endpoint layer (only when importing a line layer)
Optimize	Boolean	Whether to optimize the geographic file automatically after the import (defaults to "True")
Raw Attributes	Boolean	Whether to skip postprocessing of known DLG file types to convert major and minor pairs into more usable attributes (defaults to "False")
Snap Distance	Real	Distance in miles to snap tile boundary nodes
Table Filename	String	The path and file name in which attributes are stored; the file extension must be .BIN, .CSV, .DBF, or .TXT; a required option

 

Example

ImportDLG({"c:\\dlgfiles\\newton.OPT", "c:\\dlgfiles\\boston.OPT"}, "roads.dbd", "Line", {

     {"Label", "Roads"},

     {"Layer Name", "Road"},

     {"Optimize", "True"},

     {"Table Filename", "roads.bin"}

     })

 

Error Codes

Error Type	Meaning
NotFound	The specified file could not be found
Error	The file is not a valid Digital Line Graph file

 

See Also

Function	Summary
GetDLGInfo()	Collects summary information on the contents of a USGS Digital Line Graph file
ImportDEM()	Imports features from Digital Elevation Model files
ImportGIRAS()	Imports features from USGS Land Use and Land Cover files