[Therion] Surface woes

[Martin Budaj]

> Trouble is the jpg seems to be "zoomed in" many times too much.
>
>    bitmap ./Surface/Canaan_South_Topo_NZMG_990210_020240.jpg \
>      [0 0 2499000 6021000 100 100 2502000 6024000]
>
> 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.

-- answered by Wolfgang

> 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.

Perhaps they are hidden below the surface bitmap. This needs to be
fixed in some of the next releases.

> 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 has to work in both modes (surface bitmap in 2D, surface bitmap +
terrain in loch). You have to enter DTM (elevations) to display also
the topographical map in 3D.

Martin