Thanks Nikita.
First, I thought about doing it as you say. But I want an image that
only has the survey and the rest is transparent, so putting the grid
complicates my work.
Then I discovered that the "calibrate bitmap" option does all the work.
But it's not working.
We don't need the gridbecause the exported Therion PDF have a comment
with nine coordinates (thCalibrate) . A Xtherion tcl command
(mapcal.tcl) do the calculation from the pdf coordinates to the bitmap
coordinates. I am now doing inverse engineering with this file to
understand the equations, to do the calculation manually.
Regards,
Evaristo.
El 26/03/2018 a las 11:32, Nikita Kozlov via Therion escribió:
For possible work-around you can export map with grid lines, and use
grid lines intersection points as GCP (ground control points) with
known coordinates to manually georeference your raster PNG.
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