Comments (6)
I just came across this as well. What the heck is going on there?
from pyproj.
I also had a problem today when I wished to use the support for arrays but encountered the following error when passing an array of shape n,2 to the projection instance: ValueError: need more than 1 value to unpack.
The documentation should at least be changed so as not to mislead people into thinking that there is support for arrays.
from pyproj.
Same error for me. Can someone give an explanation of why numpy arguments are no longer supported? It would help a lot if fixed.
from pyproj.
I think Transformer.transform() recently introduced with #189 closes this longstanding issue.
from pyproj.
Here is the current recommended method to transform 2D numpy arrays with pyproj 2.x:
>>> from shapely.geometry import LineString, Point
>>> import numpy
>>> ll = LineString([Point(ii, ii) for ii in numpy.arange(0, 90, 0.01)])
>>> points = numpy.asarray(ll)
>>> points
array([[0.000e+00, 0.000e+00],
[1.000e-02, 1.000e-02],
[2.000e-02, 2.000e-02],
...,
[8.997e+01, 8.997e+01],
[8.998e+01, 8.998e+01],
[8.999e+01, 8.999e+01]])
>>> from pyproj import Transformer
>>> transformer = Transformer.from_crs("epsg:4326", "epsg:3857")
>>> points_3857 = numpy.empty(points.shape)
>>> points_3857[:, 0], points_3857[:, 1] = transformer.transform(points[:, 0], points[:, 1])
>>> points_3857
array([[0.00000000e+00, 0.00000000e+00],
[1.11319491e+03, 1.11319491e+03],
[2.22638982e+03, 2.22638986e+03],
...,
[1.00154146e+07, 5.26064404e+07],
[1.00165278e+07, 5.51925525e+07],
[1.00176410e+07, 5.96135402e+07]])
from pyproj.
I believe with #38 and #4 (comment), this issue has been resolved. Feel free to continue the discussion if you have further questions.
from pyproj.
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from pyproj.