I am trying to model ancient land surfaces we can 'rollback' geological folding and faulting. This is called palinspastic modelling or mapping.

So I have an area that due to folding and faulting was reduced by 50% in a N-S direction. I am using QGIS.

I have been unable to find any preset function that will allow me to stretch my map by 150% in the NS direction.

I did look at creating a custom CRS but even within proj and WKT there does not appear to be this facility. I am sure there must be and I have missed it.

Can anybody help?


GRASS library v.transform did the work.

I tried it on the QGIS 3.11.0 with GRASS 7.8.2 version and I got no response.

Reverting to version 3.10.1 with GRASS 7.8.0 the transformation worked fine. Possibly an issue with my installation.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.