Chuangwu Deng issues

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                                            Chuangwu Deng

perf(reader): replace the scipy.spatial.cKDTree with pygeos.STRtree to find the nearest node and element

Using pygeos.STRtree method will be more efficient than scipy.spatial.cKDTree when searching for the index of the nearest node and element. Closes #889

The difference between scipy.spatial.cKDTree and pygeos.STRtree

In the opendrift/readers/basereader/unstructured.py ，I found the method _build_ckdtree_ and _nearest_ckdtree_ take a long time when running the openoil, so I made the following changes in the method which find the...

Can the interpolation range be limited in advance to improve program efficiency?

It's very slow when I use the program to read TPXO9-atlas-v5 and compute tidal elevations. So I check the profile of the code and found that the most time-consuming function...