topic Coordinate system issues/projection issues in ArcGIS Explorer Desktop Questions

Coordinate system issues/projection issues

ZacharyPierce — Tue, 08 Nov 2011 14:11:47 GMT

I have one shapefile which is GCS WGS_1984.

I then have a .dwg file that has no spatial reference. I exported the polyline file to a shapefile and it still has no spatial reference. I project to align the same as the other shapefile but I am getting a problem.

The original has extents of -102.0 and -87.00 dd and the new one is like 6940520 ft.

I keep starting over and making them all the same and not getting them to align.

Please help.

Re: Coordinate system issues/projection issues

ZacharyPierce — Tue, 08 Nov 2011 14:18:40 GMT

When I add the original file... I get this warning message:

"Warning, inconsistent extent!

One or more of the added layers has an extent that is not consistent with the associated spatial reference information.

Re-Projection the data in such a layer may lead to unexpected behavior. Use Arc Catalog to confirm the spatial reference is correct and adjust if necessary.

Re: Coordinate system issues/projection issues

PeterStratton — Tue, 08 Nov 2011 14:46:50 GMT

Where did your dwg come from? If it came from CADD, are you sure it was created using a geographic coordinate system? Quite often they are created in local coordinate systems that have no relationship to the real world apart from the unit of measurement.