Problem using OSGB36

[[e-mail]]

Thanks for the prompt reply. I have now repeated my test with 56 deg North & 3 deg West - which is in Scotland. Again I'm getting similar results of 0,0,0 for OSGB. I have checked the version it is 1.0.1.146, I downloaded it again and it is the same.

[Paul Michell]

Have you copied all of the DAT files as well as the DLL? They need to be in the same folder as the DLL, there should be 8 of them.

[[e-mail]]

Yes I have copied all 6 files (I did wonder if I only needed the GM15GB one). I copied them to the MSAccess folder to be with GridInQuestIIExample.mdb.

[Paul Michell]

There should be two more: TN02GB.dat, TN15GB.dat. These contain the horizontal deltas for OSTN02 and OSTN15, that will be why you are only getting a problem with SRID 27700, BNG is the only CS that uses these two tables.

[[e-mail]]

Thanks, I had only copied 6 rather than all 8 files. It's working now.