[Therion] Multiple elevation maps

[Bill Gee]

Hi Bruce and Martin -

Very nice!  This is exactly what I was looking for.  The "secret" is how the 
select statements work, and then to have a select before each export.

I will apply this to the real cave map I am working on and report back 
results.

There is a new question ...  What is the effect of specifying the degree angle 
of the view for "-proj elevation"?  The profiles for the real cave I am working 
on were sketched along the survey line.  That means they bend and twist as the 
survey line bends.  In this case the survey line is very close to running down 
the center of the cave, but that is not always the case.

One leg from the T-Junction has a "dog leg" bend in it.  At one station it 
goes from north to almost east for about 70 feet, then it turns back to almost 
straight north.  The profile sketches follow the centerline and so make the 
same twist.

Since every profile sketch has two survey stations (or more), Therion can morph 
the sketch to the data.  If a view angle is specified, does it mean that some 
sections of the profile will be morphed more than others?

Many thanks for all your help!

Bill Gee


On Wednesday, November 12, 2014 22:36:53 Bruce wrote:
> Bill
> 
> The attached files demonstrate what I think you were describing in your
> original message.  All of the changes I made to your files have the tag
> #B20141112 added to them.
> 
> 
> 
> I have modified each elevation map to use a different projection.  Of course
> it is ridiculous with this particular example, being essentially straight,
> but it is the sort of thing one might do for a Tee shaped cave as you
> originally described.
> 
> I had to change the projection of each elevation scrap, and this is not
> something you would usually do after it has been drawn - of course the shape
> of a scrap depends very much on the projection, and to change the
> projection later on will usually render it meaningless (although Therion
> can pull off some amazing morphing).
> 
> 
> 
> I added debug all to label the scraps, stations and observe the morphing.
> 
> 
> 
> I also took the opportunity to test the transparent background that I was
> having trouble with in my datasets - it works!
> 
> 
> 
> Regards
> 
> Bruce
> 
> 
> 
> -----Original Message-----
> From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
> Of Bruce
> Sent: Wednesday, 12 November 2014 7:29 p.m.
> To: 'List for Therion users'
> Subject: Re: [Therion] Multiple elevation maps
> 
> 
> 
> Hi Bill
> 
> I think I see your problem.  I will potter around with the example you sent
> 
> to demonstrate what I think you want, but maybe not tonight.
> 
> 
> 
> For now, you can avoid the 'object not found' error by double clicking on
> 
> the survey or map item on the right-hand side of XTherion. For example it
> 
> places...
> 
> 
> 
> select AllElevations.map at PracticeCave
> 
> 
> 
> 
> 
> ...at the cursor position in the th-config file.
> 
> 
> 
> And, if you select multiple maps of one projection, they will all be used in
> 
> the export for that projection.
> 
> 
> 
> -Plan is a projection
> 
> -Extended is a projection (developed or straightened out elevation) see
> 
> http://therion.speleo.sk/wiki/doku.php/faq#projections_plan_elevation_extend
> 
> ed_and_none
> 
> -Elevation is a default for [elevation 000 deg] ie 'looking north'. So
> 
> assuming there are 360 degrees in a circle there are 360 different elevation
> 
> projections.
> 
> 
> 
> If all your elevations have the same projection, all the elevation maps will
> 
> end up in the same pdf (unless you modify the th-config between runs or use
> 
> multiple th-configs as Rowena suggests).
> 
> 
> 
> I will modify your example to demonstrate using two elevation projections
> 
> (without resorting to indexes).
> 
> 
> 
> Bruce