Rodrigo

Looks like you have just become the symbol man!

Just giving these a quick test and critical review.

Have a look at and compare the attached sample maps.

1. May want to reconsider the insertion (0,0) point of some points (wheelchair, drip and camera), although they might be OK also.
2. Points gate, no-wheelchair, water-drip, and possibly human-bone, danger should probably allow the foreground/background colour to show through.
3. Points with multiple speleothems do not handle rotation well.  I think the existing Therion stalactites and stalagmites suffer from the same problem.
4. The picture based symbols have no U: definition, so they crash Therion with metapost exit code – 2 if you try to align them.  They should have a reasonable U: parameter set.
5. Points that can be aligned , have their (non-zero) rotation corrupted when they are both rotated and aligned.  You can see in the example that the speleothem points have been aligned bottom-right, when the th2 file says they should be aligned right).  This problem exists with all (almost) existing Therion points.  I have identified the cause and proposed a solution here https://therion.speleo.sk/wiki/metapost#symbol_sizing_and_positioning but my metapost skills are very basic, so no doubt it could be improved upon.

Many of these points would not usually be rotated, but alignment is something that I expect should be used often.  However, I think it is reasonable that all points should accept this combination of transformations gracefully.

Bruce