GCS_North_American_1927

[Anonymous]

Can someone tell me which datum to assign in Map (LDD 2006) that is the equivalent of what ESRI reads as GCS_North_American_1927? I have downloaded a USGS DEM which is assigned to this spatial reference but when I try to import other data sources into this drawing they don't overlay correctly. I can get it to overlay correctly in ArcGIS 9.2 but I don't want to use it for what I am working on. I want to use MAP... I tried setting up my original drawing as LL84 and some others but not having any luck.
Thanks so much...

[Anonymous]

See if this is of any help:
http://discussion.autodesk.com/thread.jspa?threadID=570539

Allen

wrote in message news:5648541@discussion.autodesk.com...
Can someone tell me which datum to assign in Map (LDD 2006) that is the
equivalent of what ESRI reads as GCS_North_American_1927? I have downloaded
a USGS DEM which is assigned to this spatial reference but when I try to
import other data sources into this drawing they don't overlay correctly. I
can get it to overlay correctly in ArcGIS 9.2 but I don't want to use it for
what I am working on. I want to use MAP... I tried setting up my original
drawing as LL84 and some others but not having any luck.
Thanks so much...

[Anonymous]

Link doesn't work, looking for exact same help the first guy was. I have a map i downloaded from here http://ngmdb.usgs.gov/maps/topoview/viewer/#4/40.00/-107.51 and autocad does not understand the projection it is in, however if I try to bring in the image in ESRI arcmap it says the projection is GCS_North_american_1927.  What do I set cooridante system to in autocad map?