AutoCAD Map 3D supports Arc/INFO
version 7.2, 7.3, and 8.x, and E00.
ESRI Arc/INFO stores
coverages on your hard disk as a directory of files. The main coverage
directory, called the workspace, always includes one subdirectory
called INFO. Each coverage is written to its own subdirectory. If
you do not have a coverage workspace on your computer, AutoCAD Map 3D creates
one for you when you export to an ARC/INFO coverage.
Arc/INFO uses elevation
values but they are stored in the coverage as a field in the attribute
table. Select the Elevation property to export
When exporting, the exported
file is stored in memory before it is written to the file. If you
run into problems exporting a large drawing, increase the size of
your virtual memory.
PC coverages are single
precision. UNIX coverages can be single or double precision. AutoCAD Map 3D always
exports double-precision coverages, although it does import single-
or double-precision coverages.
Map objects such as arcs,
splines, and circles are segmented in the coverage. You can change
the settings used for segmentation by editing the mapimport.ini file.
When specifying a coverage
name, use fewer than 14 characters and do not use periods in the
name. If you use double-byte characters, you can use 6 or fewer
If you specify a directory
name that already exists and it contains a log or text file, those
files may be overwritten.
Arc/INFO also supports
a transfer format called E00 which writes all information out to
a single file, which can become quite large.
When exporting text or
mtext to Arc/Info Coverages, the resulting objects in the Coverage
data are annotation. AutoCAD Map 3D does not support attribute data
for annotation. As a result any data linked to text objects will be
lost during the export process. The text value itself will be maintained.
When exporting to E00
or coverage format, you can set the following options:
||Select Double or Single.
The default is Double.
|Compression (available only for E00)
||Select None, Partial,
||Select Create or Bypass.
The default is Create.