ImportDXF()

Argument

Contents

filename

The path and file name of the DXF file 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

Entity Types

Array

An array of strings listing the types of entities to import; omit this option to import all entities of the correct type

Expand

Boolean

If "True" blocks in the DXF file are expanded into separate entities in the geographic file; if "False" blocks are not expanded

Fields

Varies

The string "All" to import all attributes, null to import none of the attributes, or an array of attribute field names indicating the fields to import; this option is required

Label

String

A descriptive label for the geographic file

Layer Name

String

The name of the layer in the geographic file

Layers

Array

An array of DXF layer names indicating the layers to import, or the string "All" to import all layers; a required option

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

NAD Conversion

3 strings

Input datum, output datum, and conversion file (if needed); the input and output datums should be different

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")

Overlap

String

Describes what to do with areas that overlap; takes one of the following values:

"Ignore" - Leave overlaps as-is and simply create a non-topological database, possibly containing overlapping areas

"Merge" (the default) - Where two areas overlap, merge the intersection into one of them; which one is arbitrarily decided

"New" - Create a new area where the two areas overlap

Projection

String, array

The projection name and the array of options

Table Filename

String

The path and name of the file in which attributes are stored; the file extension must be .BIN, .CSV, .DBF, or .TXT; this option is required

Topology

Boolean

For area layers, a value of "True" indicates that the resulting geographic file should have true area topology, which requires substantial complex processing. A value of "False" means that boundary edges can be duplicated, so that larger files can be imported. This option does not apply to point and line layers. If the Expand option is "True", this option is ignored

Transform

Array

Array indicating the transformation to apply to coordinates in the file. This can have three forms:

1. An array of two or more four-element arrays containing local and world coordinates for control points, for example, {{real localX1, real localY1, real longitude1, real latitude1}, ...}

2. An array of four elements - {real X_multiplier, real Y_multiplier, real X_offset, real Y_offset}

3. Center and Extent transform {c1_x, c1_y, width_1, c2_x, c2_y, width_2}where center is shifted from (c1_x,c1_y) to (c2_x,c2_y), and vector of length width_1 out of c_1 becomes a vector of length width_2 out of c_2.

Error Type

Meaning

Error

The file is not a valid DXF file

NotFound

There is no file with the specified name; or there are no entities in the designated layers of the desired type

Function

Summary

ClearDXFInfo()

Frees memory used by GetDXFInfo()

ExportDXF()

Exports features in a geographic file to a DXF file

GetDXFInfo()

Collects summary information on the contents of a DXF file