447 строки
14 KiB
Python
Исполняемый файл
447 строки
14 KiB
Python
Исполняемый файл
#!/usr/bin/env pytest
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###############################################################################
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# $Id$
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#
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# Project: GDAL/OGR Test Suite
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# Purpose: ContourGenerate() testing
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# Author: Even Rouault <even dot rouault @ spatialys.com>
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#
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###############################################################################
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# Copyright (c) 2010, Even Rouault <even dot rouault at spatialys.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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###############################################################################
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import os
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import struct
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import gdaltest
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import ogrtest
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import pytest
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from osgeo import gdal, ogr
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###############################################################################
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# Test with -a and -i options
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def test_contour_1():
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try:
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os.remove("tmp/contour.shp")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.dbf")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.shx")
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except OSError:
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pass
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drv = gdal.GetDriverByName("GTiff")
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wkt = 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4326"]]'
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size = 160
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precision = 1.0 / size
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ds = drv.Create("tmp/gdal_contour.tif", size, size, 1)
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ds.SetProjection(wkt)
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ds.SetGeoTransform([1, precision, 0, 50, 0, -precision])
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raw_data = struct.pack("h", 10) * int(size / 2)
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for i in range(int(size / 2)):
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ds.WriteRaster(
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int(size / 4),
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i + int(size / 4),
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int(size / 2),
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1,
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raw_data,
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buf_type=gdal.GDT_Int16,
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band_list=[1],
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)
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raw_data = struct.pack("h", 20) * int(size / 2)
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for i in range(int(size / 4)):
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ds.WriteRaster(
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int(size / 4) + int(size / 8),
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i + int(size / 4) + int(size / 8),
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int(size / 4),
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1,
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raw_data,
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buf_type=gdal.GDT_Int16,
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band_list=[1],
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)
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raw_data = struct.pack("h", 25) * int(size / 4)
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for i in range(int(size / 8)):
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ds.WriteRaster(
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int(size / 4) + int(size / 8) + int(size / 16),
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i + int(size / 4) + int(size / 8) + int(size / 16),
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int(size / 8),
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1,
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raw_data,
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buf_type=gdal.GDT_Int16,
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band_list=[1],
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)
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ogr_ds = ogr.GetDriverByName("ESRI Shapefile").CreateDataSource("tmp/contour.shp")
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ogr_lyr = ogr_ds.CreateLayer("contour")
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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field_defn = ogr.FieldDefn("elev", ogr.OFTReal)
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ogr_lyr.CreateField(field_defn)
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gdal.ContourGenerate(ds.GetRasterBand(1), 10, 0, [], 0, 0, ogr_lyr, 0, 1)
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ds = None
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expected_envelopes = [
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[1.25, 1.75, 49.25, 49.75],
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[1.25 + 0.125, 1.75 - 0.125, 49.25 + 0.125, 49.75 - 0.125],
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]
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expected_height = [10, 20]
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lyr = ogr_ds.ExecuteSQL("select * from contour order by elev asc")
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assert lyr.GetFeatureCount() == len(expected_envelopes)
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i = 0
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feat = lyr.GetNextFeature()
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while feat is not None:
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envelope = feat.GetGeometryRef().GetEnvelope()
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assert feat.GetField("elev") == expected_height[i]
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for j in range(4):
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if expected_envelopes[i][j] != pytest.approx(
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envelope[j], abs=precision / 2 * 1.001
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):
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print("i=%d, wkt=%s" % (i, feat.GetGeometryRef().ExportToWkt()))
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print(feat.GetGeometryRef().GetEnvelope())
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pytest.fail(
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"%f, %f" % (expected_envelopes[i][j] - envelope[j], precision / 2)
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)
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i = i + 1
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feat = lyr.GetNextFeature()
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ogr_ds.ReleaseResultSet(lyr)
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ogr_ds.Destroy()
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###############################################################################
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# Test with -fl option and -3d option
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def test_contour_2():
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try:
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os.remove("tmp/contour.shp")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.dbf")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.shx")
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except OSError:
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pass
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ogr_ds = ogr.GetDriverByName("ESRI Shapefile").CreateDataSource("tmp/contour.shp")
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbLineString25D)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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field_defn = ogr.FieldDefn("elev", ogr.OFTReal)
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ogr_lyr.CreateField(field_defn)
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ds = gdal.Open("tmp/gdal_contour.tif")
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gdal.ContourGenerate(ds.GetRasterBand(1), 0, 0, [10, 20, 25], 0, 0, ogr_lyr, 0, 1)
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ds = None
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size = 160
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precision = 1.0 / size
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expected_envelopes = [
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[1.25, 1.75, 49.25, 49.75],
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[1.25 + 0.125, 1.75 - 0.125, 49.25 + 0.125, 49.75 - 0.125],
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[
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1.25 + 0.125 + 0.0625,
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1.75 - 0.125 - 0.0625,
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49.25 + 0.125 + 0.0625,
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49.75 - 0.125 - 0.0625,
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],
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]
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expected_height = [10, 20, 25, 10000]
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lyr = ogr_ds.ExecuteSQL("select * from contour order by elev asc")
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assert lyr.GetFeatureCount() == len(expected_envelopes)
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i = 0
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feat = lyr.GetNextFeature()
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while feat is not None:
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assert feat.GetGeometryRef().GetZ(0) == expected_height[i]
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envelope = feat.GetGeometryRef().GetEnvelope()
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assert feat.GetField("elev") == expected_height[i]
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for j in range(4):
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if expected_envelopes[i][j] != pytest.approx(
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envelope[j], abs=precision / 2 * 1.001
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):
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print("i=%d, wkt=%s" % (i, feat.GetGeometryRef().ExportToWkt()))
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print(feat.GetGeometryRef().GetEnvelope())
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pytest.fail(
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"%f, %f" % (expected_envelopes[i][j] - envelope[j], precision / 2)
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)
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i = i + 1
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feat = lyr.GetNextFeature()
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ogr_ds.ReleaseResultSet(lyr)
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ogr_ds.Destroy()
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###############################################################################
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#
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def test_contour_real_world_case():
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ogr_ds = ogr.GetDriverByName("Memory").CreateDataSource("")
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbLineString)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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field_defn = ogr.FieldDefn("elev", ogr.OFTReal)
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ogr_lyr.CreateField(field_defn)
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ds = gdal.Open("data/contour_in.tif")
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gdal.ContourGenerate(ds.GetRasterBand(1), 10, 0, [], 0, 0, ogr_lyr, 0, 1)
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ds = None
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ogr_lyr.SetAttributeFilter("elev = 330")
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assert ogr_lyr.GetFeatureCount() == 1
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f = ogr_lyr.GetNextFeature()
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assert (
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ogrtest.check_feature_geometry(
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f,
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"LINESTRING (4.50497512437811 11.5,4.5 11.501996007984,3.5 11.8333333333333,2.5 11.5049751243781,2.490099009901 11.5,2.0 10.5,2.5 10.1666666666667,3.0 9.5,3.5 9.21428571428571,4.49800399201597 8.5,4.5 8.49857346647646,5.5 8.16666666666667,6.5 8.0,7.5 8.0,8.0 7.5,8.5 7.0,9.490099009901 6.5,9.5 6.49667774086379,10.5 6.16666666666667,11.4950248756219 5.5,11.5 5.49833610648919,12.5 5.49667774086379,13.5 5.49800399201597,13.501996007984 5.5,13.5 5.50199600798403,12.501996007984 6.5,12.5 6.50142653352354,11.5 6.509900990099,10.509900990099 7.5,10.5 7.50142653352354,9.5 7.9,8.50332225913621 8.5,8.5 8.50249376558603,7.83333333333333 9.5,7.5 10.0,7.0 10.5,6.5 10.7857142857143,5.5 11.1666666666667,4.50497512437811 11.5)",
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0.01,
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)
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== 0
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)
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# Test with -p option (polygonize)
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def test_contour_3():
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try:
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os.remove("tmp/contour.shp")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.dbf")
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except OSError:
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pass
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try:
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os.remove("tmp/contour.shx")
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except OSError:
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pass
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ogr_ds = ogr.GetDriverByName("ESRI Shapefile").CreateDataSource("tmp/contour.shp")
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbMultiPolygon)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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field_defn = ogr.FieldDefn("elevMin", ogr.OFTReal)
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ogr_lyr.CreateField(field_defn)
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field_defn = ogr.FieldDefn("elevMax", ogr.OFTReal)
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ogr_lyr.CreateField(field_defn)
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ds = gdal.Open("tmp/gdal_contour.tif")
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# gdal.ContourGenerateEx(ds.GetRasterBand(1), 0, 0, 0, [10, 20, 25], 0, 0, ogr_lyr, 0, 1, 1)
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gdal.ContourGenerateEx(
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ds.GetRasterBand(1),
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ogr_lyr,
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options=[
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"FIXED_LEVELS=10,20,25",
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"ID_FIELD=0",
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"ELEV_FIELD_MIN=1",
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"ELEV_FIELD_MAX=2",
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"POLYGONIZE=TRUE",
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],
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)
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ds = None
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size = 160
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precision = 1.0 / size
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expected_envelopes = [
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[1.0, 2.0, 49.0, 50.0],
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[1.25, 1.75, 49.25, 49.75],
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[1.25 + 0.125, 1.75 - 0.125, 49.25 + 0.125, 49.75 - 0.125],
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[
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1.25 + 0.125 + 0.0625,
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1.75 - 0.125 - 0.0625,
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49.25 + 0.125 + 0.0625,
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49.75 - 0.125 - 0.0625,
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],
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]
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expected_height = [10, 20, 25, 10000]
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lyr = ogr_ds.ExecuteSQL("select * from contour order by elevMin asc")
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assert lyr.GetFeatureCount() == len(expected_envelopes)
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i = 0
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feat = lyr.GetNextFeature()
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while feat is not None:
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if i < 3 and feat.GetField("elevMax") != expected_height[i]:
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pytest.fail(
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"Got %f as z. Expected %f"
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% (feat.GetField("elevMax"), expected_height[i])
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)
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elif i > 0 and i < 3 and feat.GetField("elevMin") != expected_height[i - 1]:
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pytest.fail(
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"Got %f as z. Expected %f"
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% (feat.GetField("elevMin"), expected_height[i - 1])
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)
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envelope = feat.GetGeometryRef().GetEnvelope()
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for j in range(4):
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if expected_envelopes[i][j] != pytest.approx(
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envelope[j], abs=precision / 2 * 1.001
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):
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print("i=%d, wkt=%s" % (i, feat.GetGeometryRef().ExportToWkt()))
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print(feat.GetGeometryRef().GetEnvelope())
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pytest.fail(
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"%f, %f" % (expected_envelopes[i][j] - envelope[j], precision / 2)
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)
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i = i + 1
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feat = lyr.GetNextFeature()
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ogr_ds.ReleaseResultSet(lyr)
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ogr_ds.Destroy()
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# Check behaviour when the nodata value as a double isn't exactly the Float32 pixel value
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def test_contour_nodata_precision_issue_float32():
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ogr_ds = ogr.GetDriverByName("ESRI Shapefile").CreateDataSource(
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"/vsimem/contour.shp"
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)
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbLineString)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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ds = gdal.Open("data/nodata_precision_issue_float32.tif")
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gdal.ContourGenerateEx(
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ds.GetRasterBand(1),
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ogr_lyr,
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options=[
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"LEVEL_INTERVAL=0.1",
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"ID_FIELD=0",
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"NODATA=%.19g" % ds.GetRasterBand(1).GetNoDataValue(),
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],
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)
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ds = None
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assert ogr_lyr.GetFeatureCount() == 0
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ogr_ds = None
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ogr.GetDriverByName("ESRI Shapefile").DeleteDataSource("/vsimem/contour.shp")
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@pytest.mark.require_driver("AAIGRID")
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def test_contour_too_many_levels():
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ogr_ds = ogr.GetDriverByName("ESRI Shapefile").CreateDataSource(
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"/vsimem/contour.shp"
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)
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbLineString)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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content1 = """ncols 2
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nrows 2
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xllcorner 0
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yllcorner 0
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cellsize 1
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1e30 0
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0 0"""
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content2 = """ncols 2
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nrows 2
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xllcorner 0
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yllcorner 0
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cellsize 1
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1e6 0
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0 0"""
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for content in (content1, content2):
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with gdaltest.tempfile("/vsimem/test.asc", content):
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ds = gdal.Open("/vsimem/test.asc")
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with pytest.raises(Exception):
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gdal.ContourGenerateEx(
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ds.GetRasterBand(1),
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ogr_lyr,
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options=["LEVEL_INTERVAL=1", "ID_FIELD=0"],
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)
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with gdaltest.tempfile("/vsimem/test.asc", content):
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ds = gdal.Open("/vsimem/test.asc")
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with pytest.raises(Exception):
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gdal.ContourGenerateEx(
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ds.GetRasterBand(1),
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ogr_lyr,
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options=[
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"LEVEL_INTERVAL=1",
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"LEVEL_EXP_BASE=1.0001",
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"ID_FIELD=0",
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],
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)
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ogr_ds = None
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ogr.GetDriverByName("ESRI Shapefile").DeleteDataSource("/vsimem/contour.shp")
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###############################################################################
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def test_contour_raster_acquisition_error():
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ogr_ds = ogr.GetDriverByName("Memory").CreateDataSource("")
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ogr_lyr = ogr_ds.CreateLayer("contour", geom_type=ogr.wkbLineString)
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field_defn = ogr.FieldDefn("ID", ogr.OFTInteger)
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ogr_lyr.CreateField(field_defn)
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ds = gdal.Open("../gcore/data/byte_truncated.tif")
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with pytest.raises(Exception):
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gdal.ContourGenerateEx(
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ds.GetRasterBand(1), ogr_lyr, options=["LEVEL_INTERVAL=1", "ID_FIELD=0"]
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)
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###############################################################################
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# Cleanup
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def test_contour_cleanup():
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ogr.GetDriverByName("ESRI Shapefile").DeleteDataSource("tmp/contour.shp")
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try:
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os.remove("tmp/gdal_contour.tif")
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except OSError:
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pass
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