python/tests/raster/test_meta.py

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

from pytest import approx

from sedona.spark.raster.meta import AffineTransform, PixelAnchor


class TestAffineTransform:

    def test_change_anchor_to_upper_left(self):
        scale_x = 10.0
        skew_y = 1.0
        skew_x = 2.0
        scale_y = -8.0
        ip_x = 100
        ip_y = 200

        trans = AffineTransform(
            scale_x, skew_y, skew_x, scale_y, ip_x, ip_y, PixelAnchor.CENTER
        )
        trans_gdal = trans.with_anchor(PixelAnchor.UPPER_LEFT)
        assert trans_gdal.scale_x == approx(scale_x)
        assert trans_gdal.scale_y == approx(scale_y)
        assert trans_gdal.skew_x == approx(skew_x)
        assert trans_gdal.skew_y == approx(skew_y)
        assert trans_gdal.ip_x == approx(94.0)
        assert trans_gdal.ip_y == approx(203.5)

    def test_change_anchor_to_center(self):
        scale_x = 10.0
        skew_y = 1.0
        skew_x = 2.0
        scale_y = -8.0
        ip_x = 100
        ip_y = 200

        trans_gdal = AffineTransform(
            scale_x, skew_y, skew_x, scale_y, ip_x, ip_y, PixelAnchor.UPPER_LEFT
        )
        trans = trans_gdal.with_anchor(PixelAnchor.CENTER)
        assert trans.scale_x == approx(scale_x)
        assert trans.scale_y == approx(scale_y)
        assert trans.skew_x == approx(skew_x)
        assert trans.skew_y == approx(skew_y)
        assert trans.ip_x == approx(106.0)
        assert trans.ip_y == approx(196.5)