Elevation Grid shifts a bit after export to GMP and reload

[Osei]

If I load a demo.txt elevation grid and I export to a Global Mapper package file and reload the GMP file, the loaded package file shifts slightly.

If I check the Metadata for each of the layers there are some differences as follows

Attribute_________demo.txt______demo.gmg
=============__==========__==========
UPPER LEFT X_____336000.000____335984.252
UPPER LEFT Y_____655000.000____655015.748
LOWER RIGHT X___340000.000____340015.748
LOWER RIGHT Y___651000.000____650984.252
.
.
.
PIXEL WIDTH______31.5 metres___31.7 metres
PIXEL HEIGHT_____31.5 metres____31.7 metres
MIN ELEVATION___241 metres_____241.9 metres
MAX ELEVATION__ 470 metres_____467.5 metres

Is there a way to fix these inaccuracies? I face the same problem if using the SDK where the Grid layer looks to have shifted slightly.

Please find attached demo.txt which is an ASCII grid file and edges.zip which contains a DXF file containing the edges of the original grid file

[global_mapper]

I took a look and found that the package export was expanding the bounds of a generated elevation grid by 1/2 sample spacing and also making the sample spacing slightly larger than it should be. I have placed a new build at http://www.globalmapper.com/global_mapper11.zip with this fixed for you to try. Simply download that file and extract the contents into your existing v11.xx installation folder to give it a try. If you are using the 64-bit version, there is a new build available at http://www.globalmapper.com/global_mapper11_64bit.zip .

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[Osei]

Thanks a lot Mike. I found the problem in the SDK and I tried it in the application. Would be glad if I could get the solution in the SDK as well. Thanks once again

[global_mapper]

I have placed an updated build of the SDK with this fixed at http://www.globalmapper.com/GlobalMa..._v133_beta.zip .

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[Osei]

I am not able to download the GM1.33 SDK. Was wondering if it was ready yet. Thanks in advance

[global_mapper]

Yes, we released v1.33 of the SDK last night. Just download it from the Developers page at http://www.globalmapper.com.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com