a) I try to get an overlay of the centreline on a scanned topographical map but I always get an error ( test.th [47] -- number expected -- end) but I don't know where to insert more numbers examplecode: surface bitmap ur.png [1 11 211065.0 2139614.0 6310 4474 237623.0 2158455.0 meters] grid-units meters grid 211000.0 2139000.0 20000.0 15000.0 2 2 10.0 10.0 10.0 10.0 end surface
'end surface' should be written without space; the 'end' hadn't been recognized as a keyword and therion expected another row of numbers. If you want only to display scanned map, grid-units and grid commands are not necessary -- they are only used in 3d model.
b) at loops: is the standard error for the measurement devices included when the loops are closed? IE when more than one GPS measurements (with high errors are used to fix the cave)?
Yes. Martin