GenericMappingTools
Making grids: create flow chart to help users
GMT provides several ways of gridding data;
-
triangulate -
nearneighbor -
greenspline(?) -
sphinterpolate(?) -
surface - more?
What about adding a section (where appropriate) and figure/flow chart in the docs that help users to choose the right algorithm for their data?
I'm happy to help with this (when time permits..), but I would need some help and input. Many of the aforementioned utilities are new to me, and I don't have the necessary fingerspitzengefühl.
It is a good idea and has been considered before. I may have some background stuff for this in the interpolation section in my course notes/book, but not looking forward to the latex to rst translation. Well, not to bad.
Very interesting. You write book; are you referring to ‘Introduction to statistics & data analysis’?
Some thoughts that I have (or, questions really)
- sparse vs. dense data
- geo vs. cartesian (does this matter? One may go from one to the other)
- speed..?
There is also data size. If less than ~10k data points (computer memory dependent) you can get an exact solution with greenspline whereas with surface you will get an approximate one since it never will fully converge. But surface can handle gazillion points. There is issues such as global geo (spherical earth matters) vs local small area (no wrapping over poles to worry about)