shrug-l: CAD to GIS projection issues

Steve Carbone SCarbone at
Mon Oct 29 15:12:52 EDT 2007



I have a simple request of all of you ... I need an easy way to project
CAD drawings in GIS to GIS coordinate systems.


Here is my dilemma:


I deal with multiple projects where CAD drawings are sent to me to
overlay onto DOQQs in ArcView.  Now some of the CAD drawings that I get
will actually overlay onto my DOQQ, however, they are a rarity.  Most of
the drawings show up in Timbuktu and my DOQQ shows up in Florida.  Now,
when I extract out what I want from the CAD drawing into shapefile
format, I cannot re-project the shapefile to the coordinate system of my
choosing.  I have tried to re-project the extracted shapefile by
removing the PRJ file, and then defining a new projection for the
shapefile.  That has never met with success.  I have resorted to
attempting to edit the shapefile and just move it on top of my DOQQ,
which sometimes meets with success, however, other times not.  The CAD
designers that create these drawings have no idea what I am talking
about when I ask them to re-project their drawing from CAD (which I have
no idea if that is possible since I have never seen CAD in my life !!!)


Help !!!!!


I need an easy way to re-project the CAD extracted shapefiles that can
be replicated many times over.


people and nature
Steve Carbone
GIS\IT Specialist

550 N. Reo Street, Suite 105
Tampa, FL 33609
(813) 259-1085 (phone)
(813) 259-1086 (fax)
scarbone at
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