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[tests] Add tests for GdalUtils' wms_dimensions_for_scale()

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Germán Carrillo 2025-09-01 18:01:30 +02:00 committed by Nyall Dawson
parent 2ff37c737c
commit 0583b3ddb2
1 changed files with 59 additions and 0 deletions
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59
python/plugins/processing/tests/GdalAlgorithmsGeneralTest.py
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@ -41,6 +41,8 @@ from qgis.core import (
QgsRectangle,
QgsProcessingException,
QgsProcessingFeatureSourceDefinition,
QgsDistanceArea,
QgsCoordinateTransformContext,
)
from qgis.testing import QgisTestCase, start_app
@ -608,6 +610,63 @@ class TestGdalAlgorithms(QgisTestCase):
height_element = data.firstChildElement("SizeY")
self.assertEqual(height_element.text(), str(height))
def testWmsDimensionsForScale(self):
# Projected Coordinate System
bbox = QgsRectangle(472036.22487, 5552340.41684, 472376.9869, 5552638.65929)
crs = QgsCoordinateReferenceSystem("EPSG:25832")
scale = 5000
dpi = 96.0
distanceArea = None
width, height = GdalUtils._wms_dimensions_for_scale(
bbox, crs, scale, dpi, distanceArea
)
self.assertEqual(width, 258)
self.assertEqual(height, 226)
# Geographic Coordinate System
bbox = QgsRectangle(8.608813286, 50.122661591, 8.613558769, 50.125328064)
crs = QgsCoordinateReferenceSystem("EPSG:4326")
scale = 3500
dpi = 96.0
distanceArea = QgsDistanceArea()
distanceArea.setSourceCrs(crs, QgsCoordinateTransformContext())
distanceArea.setEllipsoid(crs.ellipsoidAcronym())
width, height = GdalUtils._wms_dimensions_for_scale(
bbox, crs, scale, dpi, distanceArea
)
self.assertEqual(width, 367)
self.assertEqual(height, 206) # Height value preserving BBOX's aspect ratio
# Projected Coordinate System 2
bbox = QgsRectangle(3560914.20026, 5710368.96526, 3566446.25913, 5713634.88757)
crs = QgsCoordinateReferenceSystem("EPSG:31467")
scale = 25000
dpi = 96.0
distanceArea = None
width, height = GdalUtils._wms_dimensions_for_scale(
bbox, crs, scale, dpi, distanceArea
)
self.assertEqual(width, 837)
self.assertEqual(height, 494)
# Geographic Coordinate System 2
bbox = QgsRectangle(8.608813286, 50.122661591, 8.613558769, 50.125328064)
crs = QgsCoordinateReferenceSystem("EPSG:4326")
scale = 2000
dpi = 70.0
distanceArea = QgsDistanceArea()
distanceArea.setSourceCrs(crs, QgsCoordinateTransformContext())
distanceArea.setEllipsoid(crs.ellipsoidAcronym())
width, height = GdalUtils._wms_dimensions_for_scale(
bbox, crs, scale, dpi, distanceArea
)
self.assertEqual(width, 468)
self.assertEqual(height, 263) # Height value preserving BBOX's aspect ratio
if __name__ == "__main__":
nose2.main()