thanks. I did see your library thread, but as you say, I couldn't download it..
I have now bought a 'real' copy, so I'll check it out. I did download the Excel file that the OS had on their website, but they told me that the "Helmert type 7 parameter transformation" is approximate, and advised me to use the executable (or DLL), downloadable from the link on this page:
Welcome to OS Net - Quest Software
I doubt that this will work on WM, so I will probably 'grab' the Lat/Long from the GPS device and convert to OSGB easting and northing on a (connected) PC..
I'm still working on a program to save location and other information on-the-move, and intend to investigate post-processing the results against the OS Rinex server data.
(
National GPS Network - Active Station RINEX Data)
I have a client who needs to include location information (e/n) for items (e.g. street lamps), that they inspect/test - along with their observations, test results, and photos, in a database. They want (OSGB) eastings and northings, to the nearest metre. The GPS receiver is capable of L1 code and also phase measurements, but I don't know if I will be able to use them, without the manufacturer's API.. I don't think the intermediate GPS driver provides 'raw' data..