Converting to Local Ground Coordinates.
Posted By Ronald Haataja on 10/25/2001 at 5:08 PM

I convert to Local Coordinates by Multiplying the Average Scale Factor x the Average Elevation Factor to get the combined Factor. Then using the Locus Processor I can calculate my Local Grid Coordinates. Can I use the Locus Processor in some way to rotate these coordinates to my bearing system instead of the Grid Bearing that the Locus gives me?



Re: Converting to Local Ground Coordinates.
Posted By Randy Black on 10/25/2001 at 5:49 PM

You can for sure with the 2.5 version. I don't know about rotation with the earlier versions.
2.5 will also apply the combined scale factor automatically if you choose ground as your datum.

In a nut shell even before the latest version of Ashtech Solutions they had created an outstanding product.
Modified By Randy Black on 10/25/2001 at 6:03 PM


Re: Exporting to Local Ground Coordinates.
Posted By Gary Cann on 11/7/2001 at 9:41 PM

Has anyone out there had a problem exporting coordinates as an ascii file with Ashtech Solutions 2.4 hoping to get local ground coordinates after using the coordinate transformation routine, but only getting grid coordinates?

The solution as explained to me by Rex Williams (Ashtech dealer) is to create another customized user-defined export file format that will export coordinates that have been transformed in the software program.

Create a new user ascii template called LOCALGROUND (as an example). Select the following items from the available fields list:

[site ID][local/ground northing][local/ground easting][orthometric height]

When you now use the export project coordinates choose your new ground coordinate template and not the one you may have been using for grid coordinates. Give a name to your coordinate file and then select the save button. You should now get an ascii file that will match your transformed ground coordinate system. I find that it does work as Rex had explained. Thanks again Rex!


Modified By Gary Cann on 11/9/2001 at 9:47 PM