I have a series of lat/long coordinates, each with a corresponding Z value. Each coordinate is spaced roughly 40km apart (this is stored as a MapInfo table of points).
What I'd like to do is to "refine" this bunch of coordinates so that I have interpolated values of Z every (say) 4km apart.
I have a separate table of regions, and I'd like to get the minimum value of my (refined) Z in each region. I hope this makes sense!
I have tried to:
- create a thematic grid using my lat/long, but then what I want to do is find the minimum in each region using the thematic grid, and that doesn't work.
- I cannot browse my thematic grid either (I assume because Mapinfo stores this as a raster?)
Am I going about this the right way? Can I do this in Mapinfo Prof.? Unfortunately, all my experience with MapInfo is doing a series of very repetitive tasks, and I'm a little outside my comfort zone here.
If I can't do this in MapInfo, what tool should I use?