Global Mapper Pro

Cause of 3D Polylines in DXF Export?

Dan AndersonDan Anderson Global Mapper UserPosts: 20
edited June 2008 in Vector Data
I'm importing NHD data and exporting to a DXF file. I'm then opening the DXF file in a drawing program and losing some of the objects. The objects that are lost start like the following in the DXF file:
POLYLINE
8
WM_T_MultiUse
70
8
66
1
62
3
39
3
0
VERTEX

I believe (not being familiar with the format) the " 70\r\n8" indicates a 3D polyline. If I delete this code I get the object in the drawing program.

I've done the search by attributes list and don't find anything (and no elevation value) that is only common to those objects that don't work.

Is there a way I can get GM to generate 2D polylines?

Comments

  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited June 2008
    It sounds like for some reason your other drawing program does not like 3D POLYLINE entities. What you can do to get 2D entities out of Global Mapper is to first export your data to another format (say Shapefiles) and make sure NOT to check the box to export elevations for each feature. Then, load that Shapefile (which should no longer contain 3D features) back into Global Mapper and export it to a DXF file.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Support
    support@globalmapper.com
  • Dan AndersonDan Anderson Global Mapper User Posts: 20
    edited June 2008
    Thanks. Export to shapefile and re-import works.
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