[Therion] Calibration of co-ordinate systems

2010-05-28 Thread Andrew Atkinson
On 27/05/10 13:29, Martin Budaj wrote: > Hi, > > On Mon, May 17, 2010 at 11:17 PM, Andrew Atkinson > wrote: >> import Great_Swallet.3d -surveys use -filter great_swallet -cs EPSG:27700 >> -calibrate [0 0 0 299912 1 0] >> #Should be -calibrate [0 0 0 30 10 0] >> >> (goodness knows

[Therion] Calibration of co-ordinate systems

2010-05-27 Thread Martin Budaj
Hi, On Mon, May 17, 2010 at 11:17 PM, Andrew Atkinson wrote: > import Great_Swallet.3d -surveys use -filter great_swallet -cs EPSG:27700 > -calibrate [0 0 0 299912 1 0] > #Should be -calibrate [0 0 0 30 10 0] > > (goodness knows why the calibrate is not right, the bodge is to align

[Therion] Calibration of co-ordinate systems

2010-05-24 Thread Andrew Atkinson
I will try to explain a little more to help clarify. (we will ignore te uneven numbers for now to stick to one topic) In the OSGB it is typical to quote 10 figure grid references to fix a location to 1m EG 47130 56380 Strictly this identifies a location within a 100km square the is referred

[Therion] Calibration of co-ordinate systems

2010-05-18 Thread Wolfgang Zillig
Hi Andrew, I'm not sure if I understand your problem correctly. There is on issue with the EPSG codes for OSGB36, see: http://osgeo-org.1803224.n2.nabble.com/EPSG-27700-td4469120.html and http://www.osgeo.org/pipermail/grass-user/2009-July/051494.html But this could explain your uneven numbers

[Therion] Calibration of co-ordinate systems

2010-05-17 Thread Andrew Atkinson
Hi I am having a little bit of difficulty with the various different helps on co-ordinate systems. I am building an area survey map from data from various different sources, so having to 'adapt' it, but really do not want to have to convert it all. It would be nice to have one of the outputs