topic Problem with Defining Projection for Geosoft Grid file (magnetic) in Data Management Questions

Problem with Defining Projection for Geosoft Grid file (magnetic)

hanqishi — Tue, 23 Aug 2011 01:23:39 GMT

Hi All,

I have tried to use the �??Define Projection tool�?� in ArcGIS v10 to define the correct projection for the geophysical/magnetic image provided in Geosoft Grid format. The tool �??seems�?� to define the projection �??without problem�?�, as the process was completed successfully. However, the projection that has been defined are �??not stored�?� with the Grid file.

I have used ArcGIS v9.3 to define the projection for these images without any problem.

Any help would be appreciated.

Thanks in advance,

Emliy

Re: Problem with Defining Projection for Geosoft Grid file (magnetic)

DhanendraPrabhu1 — Thu, 13 Oct 2011 04:23:15 GMT

Has this problem solved yet?
We are facing the exact same problem.

Have logged a support query with Geosoft Australia. Have not heard back from them.

Thanks

Dhan

Re: Problem with Defining Projection for Geosoft Grid file (magnetic)

DhanendraPrabhu1 — Thu, 13 Oct 2011 07:08:17 GMT

Resolved this finally!

To project the geosoft grid with it's native Georeferencing Information (*.GI) you will need Target for ArcGIS. Try projecting the Geosoft Grid using:

- Target Surface menu > Grid Properties.
- Browse to the grid file
- Click next
- Modify
- CoordSys
- Select your Coordinate system, datum and projection
- Ok

This should create a *.GI file which goes with your grid file.
I hope this helps. If not, contact your nearest Geosoft Technical Support Representative.