287 строки
9.0 KiB
Python
Исполняемый файл
287 строки
9.0 KiB
Python
Исполняемый файл
#!/usr/bin/env pytest
|
|
###############################################################################
|
|
# $Id$
|
|
#
|
|
# Project: GDAL/OGR Test Suite
|
|
# Purpose: Test shapefile spatial index mechanism (.qix files). This can serve
|
|
# as a test for the functionality of shapelib's shptree.c
|
|
# Author: Even Rouault <even dot rouault at spatialys.com>
|
|
#
|
|
###############################################################################
|
|
# Copyright (c) 2012, Even Rouault <even dot rouault at spatialys.com>
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining a
|
|
# copy of this software and associated documentation files (the "Software"),
|
|
# to deal in the Software without restriction, including without limitation
|
|
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
# and/or sell copies of the Software, and to permit persons to whom the
|
|
# Software is furnished to do so, subject to the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be included
|
|
# in all copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
# DEALINGS IN THE SOFTWARE.
|
|
###############################################################################
|
|
|
|
import random
|
|
|
|
from osgeo import ogr
|
|
|
|
###############################################################################
|
|
#
|
|
|
|
|
|
def check_qix_non_overlapping_geoms(lyr):
|
|
|
|
geoms = []
|
|
lyr.SetSpatialFilter(None)
|
|
extents = lyr.GetExtent()
|
|
fc_ref = lyr.GetFeatureCount()
|
|
|
|
feat = lyr.GetNextFeature()
|
|
while feat is not None:
|
|
geom = feat.GetGeometryRef()
|
|
geoms.append(geom.Clone())
|
|
feat = lyr.GetNextFeature()
|
|
|
|
# Test getting each geom 1 by 1
|
|
for geom in geoms:
|
|
bbox = geom.GetEnvelope()
|
|
lyr.SetSpatialFilterRect(bbox[0], bbox[2], bbox[1], bbox[3])
|
|
lyr.ResetReading()
|
|
feat = lyr.GetNextFeature()
|
|
got_geom = feat.GetGeometryRef()
|
|
assert got_geom.Equals(geom) != 0, "expected %s. got %s" % (
|
|
geom.ExportToWkt(),
|
|
got_geom.ExportToWkt(),
|
|
)
|
|
|
|
# Get all geoms in a single gulp. We do not use exactly the extent bounds, because
|
|
# there is an optimization in the shapefile driver to skip the spatial index in that
|
|
# case. That trick can only work with non point geometries of course
|
|
lyr.SetSpatialFilterRect(
|
|
extents[0] + 0.001, extents[2] + 0.001, extents[1] - 0.001, extents[3] - 0.001
|
|
)
|
|
lyr.ResetReading()
|
|
fc = lyr.GetFeatureCount()
|
|
assert fc == fc_ref, "expected %d. got %d" % (fc_ref, fc)
|
|
|
|
|
|
###############################################################################
|
|
|
|
|
|
def build_rectangle_from_point(x, y, radius=0.1):
|
|
return ogr.CreateGeometryFromWkt(
|
|
"POLYGON((%f %f,%f %f,%f %f,%f %f,%f %f))"
|
|
% (
|
|
x - radius,
|
|
y - radius,
|
|
x - radius,
|
|
y + radius,
|
|
x + radius,
|
|
y + radius,
|
|
x + radius,
|
|
y - radius,
|
|
x - radius,
|
|
y - radius,
|
|
)
|
|
)
|
|
|
|
|
|
###############################################################################
|
|
# Test geoms on a 10x10 grid
|
|
|
|
|
|
def test_ogr_shape_qix_1():
|
|
|
|
shape_drv = ogr.GetDriverByName("ESRI Shapefile")
|
|
ds = shape_drv.CreateDataSource("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.CreateLayer("ogr_shape_qix")
|
|
|
|
for x in range(10):
|
|
for y in range(10):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
feat.SetGeometry(build_rectangle_from_point(x, y))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
ds.ExecuteSQL("CREATE SPATIAL INDEX ON ogr_shape_qix")
|
|
|
|
ds = None
|
|
|
|
ds = ogr.Open("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.GetLayer(0)
|
|
ret = check_qix_non_overlapping_geoms(lyr)
|
|
|
|
shape_drv.DeleteDataSource("/vsimem/ogr_shape_qix.shp")
|
|
|
|
return ret
|
|
|
|
|
|
###############################################################################
|
|
# Test geoms on a 100x100 grid
|
|
|
|
|
|
def test_ogr_shape_qix_2():
|
|
|
|
shape_drv = ogr.GetDriverByName("ESRI Shapefile")
|
|
ds = shape_drv.CreateDataSource("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.CreateLayer("ogr_shape_qix")
|
|
|
|
for x in range(100):
|
|
for y in range(100):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
feat.SetGeometry(build_rectangle_from_point(x, y))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
ds.ExecuteSQL("CREATE SPATIAL INDEX ON ogr_shape_qix")
|
|
|
|
ds = None
|
|
|
|
ds = ogr.Open("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.GetLayer(0)
|
|
ret = check_qix_non_overlapping_geoms(lyr)
|
|
|
|
shape_drv.DeleteDataSource("/vsimem/ogr_shape_qix.shp")
|
|
|
|
return ret
|
|
|
|
|
|
###############################################################################
|
|
# Test 2 separated regions of 10x10 geoms
|
|
|
|
|
|
def test_ogr_shape_qix_3():
|
|
|
|
shape_drv = ogr.GetDriverByName("ESRI Shapefile")
|
|
ds = shape_drv.CreateDataSource("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.CreateLayer("ogr_shape_qix")
|
|
|
|
for x in range(10):
|
|
for y in range(10):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
feat.SetGeometry(build_rectangle_from_point(x, y))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
for x in range(10):
|
|
for y in range(10):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
feat.SetGeometry(build_rectangle_from_point(x + 1000, y))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
ds.ExecuteSQL("CREATE SPATIAL INDEX ON ogr_shape_qix")
|
|
|
|
ds = None
|
|
|
|
ds = ogr.Open("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.GetLayer(0)
|
|
ret = check_qix_non_overlapping_geoms(lyr)
|
|
|
|
shape_drv.DeleteDataSource("/vsimem/ogr_shape_qix.shp")
|
|
|
|
return ret
|
|
|
|
|
|
###############################################################################
|
|
#
|
|
|
|
|
|
def check_qix_random_geoms(lyr):
|
|
|
|
geoms = []
|
|
lyr.SetSpatialFilter(None)
|
|
extents = lyr.GetExtent()
|
|
fc_ref = lyr.GetFeatureCount()
|
|
|
|
feat = lyr.GetNextFeature()
|
|
while feat is not None:
|
|
geom = feat.GetGeometryRef()
|
|
geoms.append(geom.Clone())
|
|
feat = lyr.GetNextFeature()
|
|
|
|
# Test getting each geom 1 by 1
|
|
for geom in geoms:
|
|
bbox = geom.GetEnvelope()
|
|
lyr.SetSpatialFilterRect(bbox[0], bbox[2], bbox[1], bbox[3])
|
|
lyr.ResetReading()
|
|
found_geom = False
|
|
feat = lyr.GetNextFeature()
|
|
while feat is not None and found_geom is False:
|
|
got_geom = feat.GetGeometryRef()
|
|
if got_geom.Equals(geom) == 1:
|
|
found_geom = True
|
|
else:
|
|
feat = lyr.GetNextFeature()
|
|
assert found_geom, "did not find geometry for %s" % (geom.ExportToWkt())
|
|
|
|
# Get all geoms in a single gulp. We do not use exactly the extent bounds, because
|
|
# there is an optimization in the shapefile driver to skip the spatial index in that
|
|
# case. That trick can only work with non point geometries of course
|
|
lyr.SetSpatialFilterRect(
|
|
extents[0] + 0.001, extents[2] + 0.001, extents[1] - 0.001, extents[3] - 0.001
|
|
)
|
|
lyr.ResetReading()
|
|
fc = lyr.GetFeatureCount()
|
|
assert fc == fc_ref, "expected %d. got %d" % (fc_ref, fc)
|
|
|
|
|
|
###############################################################################
|
|
|
|
|
|
def build_rectangle(x1, y1, x2, y2):
|
|
return ogr.CreateGeometryFromWkt(
|
|
"POLYGON((%f %f,%f %f,%f %f,%f %f,%f %f))"
|
|
% (x1, y1, x1, y2, x2, y2, x2, y1, x1, y1)
|
|
)
|
|
|
|
|
|
###############################################################################
|
|
# Test random geometries
|
|
|
|
|
|
def test_ogr_shape_qix_4():
|
|
|
|
shape_drv = ogr.GetDriverByName("ESRI Shapefile")
|
|
ds = shape_drv.CreateDataSource("/vsimem/ogr_shape_qix.shp")
|
|
lyr = ds.CreateLayer("ogr_shape_qix")
|
|
|
|
# The 1000,200,10 figures are such that there are
|
|
# a bit of overlapping between the geometries
|
|
for _ in range(1000):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
x1 = random.randint(0, 200)
|
|
y1 = random.randint(0, 200)
|
|
x2 = x1 + random.randint(1, 10)
|
|
y2 = y1 + random.randint(1, 10)
|
|
feat.SetGeometry(build_rectangle(x1, y1, x2, y2))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
# And add statistically non overlapping features
|
|
for _ in range(1000):
|
|
feat = ogr.Feature(lyr.GetLayerDefn())
|
|
x1 = random.randint(0, 10000)
|
|
y1 = random.randint(0, 10000)
|
|
x2 = x1 + random.randint(1, 10)
|
|
y2 = y1 + random.randint(1, 10)
|
|
feat.SetGeometry(build_rectangle(x1, y1, x2, y2))
|
|
lyr.CreateFeature(feat)
|
|
feat = None
|
|
|
|
ds.ExecuteSQL("CREATE SPATIAL INDEX ON ogr_shape_qix")
|
|
|
|
ret = check_qix_random_geoms(lyr)
|
|
|
|
shape_drv.DeleteDataSource("/vsimem/ogr_shape_qix.shp")
|
|
|
|
return ret
|