ImportDLG()

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

Error Type

Meaning

NotFound

The specified file could not be found

Error

The file is not a valid Digital Line Graph file

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