[Therion] Scale Image - Made it work

[Bruce Mutton]

I made it work at last.

I see I had forgotten almost as much as I have learned.

 

Attached is the corrected file, plus a sample of the output one gets from
it.  (Yes, extremely blurry, I squashed the file size down too much - still,
perhaps it's the thought that counts.)

 

So what have I learned?

Test examples before I post them!  If I'm not absolutely sure perhaps it's
better to keep quiet. Anyway, more half baked advise. The attached "Map
Editor Morphed sketch on output map process.doc" goes with the following
list.

I think there are other ways, but this seems to work more or less.

 

1.	To Add sketches to the drawing, first create a scrap and give it a
projection.
2.	Select the scrap
3.	Use the background image insert button to insert an image.  It
should now be visible in the editor window, you might have to zoom around a
bit to find it.  The drawing area auto adjust button is useful for this.
4.	Insert at least two points of type station and in the options text
box name them after the stations defined in the survey, in this example the
P'INDEX.th file.  These should be points for which you can make a pretty
good guess at the co-ordinates, either with respect to a co-ord system, or a
local arbitrary one that you make up, say relative to the cave entrance.

At this point you can get an output with two survey stations only, or you
can go on to trace over the image to produce cartography in the usual
Therion way.


5.	To see the morphed sketch in the output, you need to use the scraps
background image insert button.  The status bar turns red, and you click on
the image displayed in the map window.  This adds it to the text box above
the button, along with a btm left co-ord that locates it in the map window
6.	Now, scaling the sketch.  Not sure if this is necessary because I've
used TWO survey stations above, but if I'd used one it would be (as is the
case for cross sections).  In this case I scaled it - belt & braces perhaps.
Drag the two ends of the red line a known distance apart on the image.  In
this example, 984mE and 44mS.  XTherion tells you the picture scale values
and you enter the real scale values.  Use the update scrap button.

 

Now I think the image should be included in the outputs, morphed to the
survey stations that you have included.

 

And to those who can do this in their sleep.  Please speak up to let us know
if I've got it wrong yet again.

Bruce

 

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