Bruce Mutton schrieb:
Have just had some partial success at adding a surface to my outputs.
I have cave data, georeferenced to the same co-ordinate system as that below, that covers at present 1km x 1km in plan, but I expect to add other systems to extend this area.
I have cropped a jpg topo map image to an area 3km x 3km
I am exporting at 1:1000 to pdf (900mmx1012mm)
I have labelled grids at 100m centres on the cave map, so I know from observing the output that the grids and the cave are correctly georeferenced.
Trouble is the jpg seems to be “zoomed in” many times too much.
My *.th data as follows;
survey…
surface #Canaan Road South Topo
cs EPSG:27200 #NZ Map Grid 1949
bitmap ./Surface/Canaan_South_Topo_NZMG_990210_020240.jpg \
[0 0 2499000 6021000 100 100 2502000 6024000]
grid-units meter
# grid <origin x> <origin y> <x spacing> <y spacing> <x count> <y count>
# grid-flip (none)/vertical/horizontal
# [grid data]
endsurface
…
endsurvey
I have tried reducing the co-ords to the NE corner of the image, and seem to get a more legible, bur still erroneous, surface image.
Makes me suspect I’m exceeding some software limits and there’s an unreported error, or that I’m just making a dumb mistake.
A possibly related matter, I have had “sketches on” (no quote marks) in my layout since my first (almost) Therion steps last year, and not once have I had my jpg sketches exported to pdf. I expect they should, and I recall that the samples provided seem to do so - I could find no difference between my code and the samples.
Any ideas on these two issues? (surfaces most importantly)
Also the above code does not produce a 3D lox model. Is that because a surface is either 2D or 3D but not both?
It would be nice to have at least a 2D image above my lox model until I can get a grillage of elevations sorted.
Regards
Bruce
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Hi Bruce, in the bitmap command is the problem! The "0 0" and "100 100" are in pixel coordinates! This means "0 0" is the lower left corner of the image. Usually I use lower left and the upper right corner. I suppose your image is bigger than 100x100 pixel. Regards Wolfgang