TST: move tests using NADCON grids to test_transform (#1211)

Author: snowman2

pyproj/transformer.py

@@ -1205,39 +1205,6 @@ def transform(  # pylint: disable=invalid-name
     geocentric coordinates, values of x and y are given in meters.
     z is always meters.
 
-    Example usage:
-
-    >>> from pyproj import Proj, transform
-    >>> # projection 1: UTM zone 15, grs80 ellipse, NAD83 datum
-    >>> # (defined by epsg code 26915)
-    >>> p1 = Proj('epsg:26915', preserve_units=False)
-    >>> # projection 2: UTM zone 15, clrk66 ellipse, NAD27 datum
-    >>> p2 = Proj('epsg:26715', preserve_units=False)
-    >>> # find x,y of Jefferson City, MO.
-    >>> x1, y1 = p1(-92.199881,38.56694)
-    >>> # transform this point to projection 2 coordinates.
-    >>> x2, y2 = transform(p1,p2,x1,y1)
-    >>> '%9.3f %11.3f' % (x1,y1)
-    '569704.566 4269024.671'
-    >>> '%9.3f %11.3f' % (x2,y2)
-    '569722.342 4268814.028'
-    >>> '%8.3f %5.3f' % p2(x2,y2,inverse=True)
-    ' -92.200 38.567'
-    >>> # process 3 points at a time in a tuple
-    >>> lats = (38.83,39.32,38.75) # Columbia, KC and StL Missouri
-    >>> lons = (-92.22,-94.72,-90.37)
-    >>> x1, y1 = p1(lons,lats)
-    >>> x2, y2 = transform(p1,p2,x1,y1)
-    >>> xy = x1+y1
-    >>> '%9.3f %9.3f %9.3f %11.3f %11.3f %11.3f' % xy
-    '567703.344 351730.944 728553.093 4298200.739 4353698.725 4292319.005'
-    >>> xy = x2+y2
-    >>> '%9.3f %9.3f %9.3f %11.3f %11.3f %11.3f' % xy
-    '567721.149 351747.558 728569.133 4297989.112 4353489.645 4292106.305'
-    >>> lons, lats = p2(x2,y2,inverse=True)
-    >>> xy = lons+lats
-    >>> '%8.3f %8.3f %8.3f %5.3f %5.3f %5.3f' % xy
-    ' -92.220  -94.720  -90.370 38.830 39.320 38.750'
     """
     warnings.warn(
         (

test/conftest.py

@@ -14,6 +14,7 @@
 PROJ_GTE_901 = PROJ_LOOSE_VERSION >= version.parse("9.0.1")
 PROJ_GTE_91 = PROJ_LOOSE_VERSION >= version.parse("9.1")
 PROJ_GTE_911 = PROJ_LOOSE_VERSION >= version.parse("9.1.1")
+PROJ_GTE_92 = PROJ_LOOSE_VERSION >= version.parse("9.2.0")
 
 
 def unset_data_dir():

test/test_transform.py

@@ -1,8 +1,9 @@
 import numpy
 import pytest
-from numpy.testing import assert_allclose
+from numpy.testing import assert_allclose, assert_almost_equal
 
 from pyproj import Proj, __proj_version__, transform
+from test.conftest import PROJ_GTE_92
 
 
 def test_transform():
@@ -49,3 +50,78 @@ def test_transform():
     assert_allclose(numpy.maximum.reduce(numpy.ravel(x3 - x1)), 0, atol=1e-4)
     assert_allclose(numpy.minimum.reduce(numpy.ravel(y3 - y1)), 0, atol=1e-4)
     assert_allclose(numpy.maximum.reduce(numpy.ravel(y3 - y1)), 0, atol=1e-4)
+
+
+def test_transform_single_point_nad83_to_nad27():
+    # projection 1: UTM zone 15, grs80 ellipse, NAD83 datum
+    # (defined by epsg code 26915)
+    p1 = Proj("epsg:26915", preserve_units=False)
+    # projection 2: UTM zone 15, clrk66 ellipse, NAD27 datum
+    p2 = Proj("epsg:26715", preserve_units=False)
+    # find x,y of Jefferson City, MO.
+    x1, y1 = p1(-92.199881, 38.56694)
+    # transform this point to projection 2 coordinates.
+    x2, y2 = transform(p1, p2, x1, y1)
+    assert_almost_equal(
+        (x1, y1),
+        (569704.566, 4269024.671),
+        decimal=3,
+    )
+    assert_almost_equal(
+        (x2, y2),
+        (569722.394, 4268814.27) if PROJ_GTE_92 else (569722.342, 4268814.028),
+        decimal=3,
+    )
+    assert_almost_equal(
+        p2(x2, y2, inverse=True),
+        (-92.200, 38.567),
+        decimal=3,
+    )
+
+
+def test_transform_tuple_nad83_to_nad27():
+    # projection 1: UTM zone 15, grs80 ellipse, NAD83 datum
+    # (defined by epsg code 26915)
+    p1 = Proj("epsg:26915", preserve_units=False)
+    # projection 2: UTM zone 15, clrk66 ellipse, NAD27 datum
+    p2 = Proj("epsg:26715", preserve_units=False)
+    # process 3 points at a time in a tuple
+    lats = (38.83, 39.32, 38.75)  # Columbia, KC and StL Missouri
+    lons = (-92.22, -94.72, -90.37)
+    x1, y1 = p1(lons, lats)
+    x2, y2 = transform(p1, p2, x1, y1)
+    assert_almost_equal(
+        x1,
+        (567703.344, 351730.944, 728553.093),
+        decimal=3,
+    )
+    assert_almost_equal(
+        y1,
+        (4298200.739, 4353698.725, 4292319.005),
+        decimal=3,
+    )
+    assert_almost_equal(
+        x2,
+        (567721.401, 351747.526, 728569.212)
+        if PROJ_GTE_92
+        else (567721.149, 351747.558, 728569.133),
+        decimal=3,
+    )
+    assert_almost_equal(
+        y2,
+        (4297989.733, 4353489.752, 4292106.351)
+        if PROJ_GTE_92
+        else (4297989.112, 4353489.645, 4292106.305),
+        decimal=3,
+    )
+    lons2, lats2 = p2(x2, y2, inverse=True)
+    assert_almost_equal(
+        lons2,
+        (-92.220, -94.720, -90.370),
+        decimal=3,
+    )
+    assert_almost_equal(
+        lats2,
+        (38.830, 39.320, 38.750),
+        decimal=3,
+    )