about projection #605
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NAD83 is more an ellipsoid description than a projection, and from the below, basemap probably supports it: basemap/packages/basemap/src/mpl_toolkits/basemap/__init__.py Lines 315 to 318 in 461b402 UTM zone is a collection of specialized Transverse Mercator projections, as noted in the UTM example: Lines 15 to 19 in 461b402 so this should be a matter of adding a lookup table to turn UTM zone into Transverse Mercator parameters (or perhaps UTM is designed such that this can be a helper function with multiplication rather than a lookup table). Since it sounds like you have experience with UTM, perhaps you would be willing to expand that example to include a function to turn UTM zone into lon_0? |
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Thank you for the response. Yes, I think the modification might be more of adding a lookup table. However, I don't know how to do it. For the UTM example about converting UTM coordinates to lonlat, adding the following two lines should do the trick. Since this is a simple change, I didn't bother to submit a pull request. But if you you want me to do it, I can. ly,lx=pyproj.Transformer.from_crs('epsg:26917','epsg:4326').transform(x,y) |
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If there's a simple correspondence between UTM zone and EPSG code/number, the projection coordinates (0, 0) might be on the |
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1). I can confirm that there is EPSG number associated with UTM zone projection (see below). 2). No, I don't have an idea what basemap needs. EPSG:26903 - NAD83 / UTM zone 3N |
Hi Basemap developer:
I am wondering whether you can help support the projection of "NAD83 / UTM zone", which is heavily used for the USA community.
Thanks
Zhengui
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