[Therion] Surface woes

[Bruce Mutton]

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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