mirror of https://github.com/django/django.git
346 lines
14 KiB
Python
346 lines
14 KiB
Python
import json
|
|
|
|
from django.contrib.gis.db.models.functions import Distance
|
|
from django.contrib.gis.db.models.lookups import (
|
|
DistanceLookupBase, gis_lookups,
|
|
)
|
|
from django.contrib.gis.gdal import HAS_GDAL
|
|
from django.contrib.gis.geos import GEOSGeometry
|
|
from django.contrib.gis.measure import D
|
|
from django.contrib.gis.shortcuts import numpy
|
|
from django.db.models import Q
|
|
from django.test import TransactionTestCase, skipUnlessDBFeature
|
|
|
|
from ..data.rasters.textrasters import JSON_RASTER
|
|
|
|
if HAS_GDAL:
|
|
from django.contrib.gis.gdal import GDALRaster
|
|
from .models import RasterModel, RasterRelatedModel
|
|
|
|
|
|
@skipUnlessDBFeature('supports_raster')
|
|
class RasterFieldTest(TransactionTestCase):
|
|
available_apps = ['gis_tests.rasterapp']
|
|
|
|
def setUp(self):
|
|
rast = GDALRaster({
|
|
"srid": 4326,
|
|
"origin": [0, 0],
|
|
"scale": [-1, 1],
|
|
"skew": [0, 0],
|
|
"width": 5,
|
|
"height": 5,
|
|
"nr_of_bands": 2,
|
|
"bands": [{"data": range(25)}, {"data": range(25, 50)}],
|
|
})
|
|
model_instance = RasterModel.objects.create(
|
|
rast=rast,
|
|
rastprojected=rast,
|
|
geom="POINT (-95.37040 29.70486)",
|
|
)
|
|
RasterRelatedModel.objects.create(rastermodel=model_instance)
|
|
|
|
def test_field_null_value(self):
|
|
"""
|
|
Test creating a model where the RasterField has a null value.
|
|
"""
|
|
r = RasterModel.objects.create(rast=None)
|
|
r.refresh_from_db()
|
|
self.assertIsNone(r.rast)
|
|
|
|
def test_access_band_data_directly_from_queryset(self):
|
|
RasterModel.objects.create(rast=JSON_RASTER)
|
|
qs = RasterModel.objects.all()
|
|
qs[0].rast.bands[0].data()
|
|
|
|
def test_model_creation(self):
|
|
"""
|
|
Test RasterField through a test model.
|
|
"""
|
|
# Create model instance from JSON raster
|
|
r = RasterModel.objects.create(rast=JSON_RASTER)
|
|
r.refresh_from_db()
|
|
# Test raster metadata properties
|
|
self.assertEqual((5, 5), (r.rast.width, r.rast.height))
|
|
self.assertEqual([0.0, -1.0, 0.0, 0.0, 0.0, 1.0], r.rast.geotransform)
|
|
self.assertIsNone(r.rast.bands[0].nodata_value)
|
|
# Compare srs
|
|
self.assertEqual(r.rast.srs.srid, 4326)
|
|
# Compare pixel values
|
|
band = r.rast.bands[0].data()
|
|
# If numpy, convert result to list
|
|
if numpy:
|
|
band = band.flatten().tolist()
|
|
# Loop through rows in band data and assert single
|
|
# value is as expected.
|
|
self.assertEqual(
|
|
[
|
|
0.0, 1.0, 2.0, 3.0, 4.0,
|
|
5.0, 6.0, 7.0, 8.0, 9.0,
|
|
10.0, 11.0, 12.0, 13.0, 14.0,
|
|
15.0, 16.0, 17.0, 18.0, 19.0,
|
|
20.0, 21.0, 22.0, 23.0, 24.0
|
|
],
|
|
band
|
|
)
|
|
|
|
def test_implicit_raster_transformation(self):
|
|
"""
|
|
Test automatic transformation of rasters with srid different from the
|
|
field srid.
|
|
"""
|
|
# Parse json raster
|
|
rast = json.loads(JSON_RASTER)
|
|
# Update srid to another value
|
|
rast['srid'] = 3086
|
|
# Save model and get it from db
|
|
r = RasterModel.objects.create(rast=rast)
|
|
r.refresh_from_db()
|
|
# Confirm raster has been transformed to the default srid
|
|
self.assertEqual(r.rast.srs.srid, 4326)
|
|
# Confirm geotransform is in lat/lon
|
|
expected = [
|
|
-87.9298551266551, 9.459646421449934e-06, 0.0, 23.94249275457565,
|
|
0.0, -9.459646421449934e-06,
|
|
]
|
|
for val, exp in zip(r.rast.geotransform, expected):
|
|
self.assertAlmostEqual(exp, val)
|
|
|
|
def test_verbose_name_arg(self):
|
|
"""
|
|
RasterField should accept a positional verbose name argument.
|
|
"""
|
|
self.assertEqual(
|
|
RasterModel._meta.get_field('rast').verbose_name,
|
|
'A Verbose Raster Name'
|
|
)
|
|
|
|
def test_all_gis_lookups_with_rasters(self):
|
|
"""
|
|
Evaluate all possible lookups for all input combinations (i.e.
|
|
raster-raster, raster-geom, geom-raster) and for projected and
|
|
unprojected coordinate systems. This test just checks that the lookup
|
|
can be called, but doesn't check if the result makes logical sense.
|
|
"""
|
|
from django.contrib.gis.db.backends.postgis.operations import PostGISOperations
|
|
|
|
# Create test raster and geom.
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
stx_pnt = GEOSGeometry('POINT (-95.370401017314293 29.704867409475465)', 4326)
|
|
stx_pnt.transform(3086)
|
|
|
|
# Loop through all the GIS lookups.
|
|
for name, lookup in gis_lookups.items():
|
|
# Construct lookup filter strings.
|
|
combo_keys = [
|
|
field + name for field in [
|
|
'rast__', 'rast__', 'rastprojected__0__', 'rast__',
|
|
'rastprojected__', 'geom__', 'rast__',
|
|
]
|
|
]
|
|
if issubclass(lookup, DistanceLookupBase):
|
|
# Set lookup values for distance lookups.
|
|
combo_values = [
|
|
(rast, 50, 'spheroid'),
|
|
(rast, 0, 50, 'spheroid'),
|
|
(rast, 0, D(km=1)),
|
|
(stx_pnt, 0, 500),
|
|
(stx_pnt, D(km=1000)),
|
|
(rast, 500),
|
|
(json.loads(JSON_RASTER), 500),
|
|
]
|
|
elif name == 'relate':
|
|
# Set lookup values for the relate lookup.
|
|
combo_values = [
|
|
(rast, 'T*T***FF*'),
|
|
(rast, 0, 'T*T***FF*'),
|
|
(rast, 0, 'T*T***FF*'),
|
|
(stx_pnt, 0, 'T*T***FF*'),
|
|
(stx_pnt, 'T*T***FF*'),
|
|
(rast, 'T*T***FF*'),
|
|
(json.loads(JSON_RASTER), 'T*T***FF*'),
|
|
]
|
|
elif name == 'isvalid':
|
|
# The isvalid lookup doesn't make sense for rasters.
|
|
continue
|
|
elif PostGISOperations.gis_operators[name].func:
|
|
# Set lookup values for all function based operators.
|
|
combo_values = [
|
|
rast, (rast, 0), (rast, 0), (stx_pnt, 0), stx_pnt,
|
|
rast, rast, json.loads(JSON_RASTER)
|
|
]
|
|
else:
|
|
# Override band lookup for these, as it's not supported.
|
|
combo_keys[2] = 'rastprojected__' + name
|
|
# Set lookup values for all other operators.
|
|
combo_values = [rast, rast, rast, stx_pnt, stx_pnt, rast, rast, json.loads(JSON_RASTER)]
|
|
|
|
# Create query filter combinations.
|
|
combos = [{x[0]: x[1]} for x in zip(combo_keys, combo_values)]
|
|
|
|
for combo in combos:
|
|
# Apply this query filter.
|
|
qs = RasterModel.objects.filter(**combo)
|
|
|
|
# Evaluate normal filter qs.
|
|
self.assertIn(qs.count(), [0, 1])
|
|
|
|
# Evaluate on conditional Q expressions.
|
|
qs = RasterModel.objects.filter(Q(**combos[0]) & Q(**combos[1]))
|
|
self.assertIn(qs.count(), [0, 1])
|
|
|
|
def test_dwithin_gis_lookup_ouptut_with_rasters(self):
|
|
"""
|
|
Check the logical functionality of the dwithin lookup for different
|
|
input parameters.
|
|
"""
|
|
# Create test raster and geom.
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
stx_pnt = GEOSGeometry('POINT (-95.370401017314293 29.704867409475465)', 4326)
|
|
stx_pnt.transform(3086)
|
|
|
|
# Filter raster with different lookup raster formats.
|
|
qs = RasterModel.objects.filter(rastprojected__dwithin=(rast, D(km=1)))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
qs = RasterModel.objects.filter(rastprojected__dwithin=(json.loads(JSON_RASTER), D(km=1)))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
qs = RasterModel.objects.filter(rastprojected__dwithin=(JSON_RASTER, D(km=1)))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter in an unprojected coordinate system.
|
|
qs = RasterModel.objects.filter(rast__dwithin=(rast, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter with band index transform.
|
|
qs = RasterModel.objects.filter(rast__1__dwithin=(rast, 1, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
qs = RasterModel.objects.filter(rast__1__dwithin=(rast, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
qs = RasterModel.objects.filter(rast__dwithin=(rast, 1, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter raster by geom.
|
|
qs = RasterModel.objects.filter(rast__dwithin=(stx_pnt, 500))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
qs = RasterModel.objects.filter(rastprojected__dwithin=(stx_pnt, D(km=10000)))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
qs = RasterModel.objects.filter(rast__dwithin=(stx_pnt, 5))
|
|
self.assertEqual(qs.count(), 0)
|
|
|
|
qs = RasterModel.objects.filter(rastprojected__dwithin=(stx_pnt, D(km=100)))
|
|
self.assertEqual(qs.count(), 0)
|
|
|
|
# Filter geom by raster.
|
|
qs = RasterModel.objects.filter(geom__dwithin=(rast, 500))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter through related model.
|
|
qs = RasterRelatedModel.objects.filter(rastermodel__rast__dwithin=(rast, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter through related model with band index transform
|
|
qs = RasterRelatedModel.objects.filter(rastermodel__rast__1__dwithin=(rast, 40))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter through conditional statements.
|
|
qs = RasterModel.objects.filter(Q(rast__dwithin=(rast, 40)) & Q(rastprojected__dwithin=(stx_pnt, D(km=10000))))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
# Filter through different lookup.
|
|
qs = RasterModel.objects.filter(rastprojected__bbcontains=rast)
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
def test_lookup_input_tuple_too_long(self):
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
qs = RasterModel.objects.filter(rast__bbcontains=(rast, 1, 2))
|
|
msg = 'Tuple too long for lookup bbcontains.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
qs.count()
|
|
|
|
def test_lookup_input_band_not_allowed(self):
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
qs = RasterModel.objects.filter(rast__bbcontains=(rast, 1))
|
|
msg = 'Band indices are not allowed for this operator, it works on bbox only.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
qs.count()
|
|
|
|
def test_isvalid_lookup_with_raster_error(self):
|
|
qs = RasterModel.objects.filter(rast__isvalid=True)
|
|
msg = 'The isvalid lookup is only available on geometry fields.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
qs.count()
|
|
|
|
def test_result_of_gis_lookup_with_rasters(self):
|
|
# Point is in the interior
|
|
qs = RasterModel.objects.filter(rast__contains=GEOSGeometry('POINT (-0.5 0.5)', 4326))
|
|
self.assertEqual(qs.count(), 1)
|
|
# Point is in the exterior
|
|
qs = RasterModel.objects.filter(rast__contains=GEOSGeometry('POINT (0.5 0.5)', 4326))
|
|
self.assertEqual(qs.count(), 0)
|
|
# A point on the boundary is not contained properly
|
|
qs = RasterModel.objects.filter(rast__contains_properly=GEOSGeometry('POINT (0 0)', 4326))
|
|
self.assertEqual(qs.count(), 0)
|
|
# Raster is located left of the point
|
|
qs = RasterModel.objects.filter(rast__left=GEOSGeometry('POINT (1 0)', 4326))
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
def test_lookup_with_raster_bbox(self):
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
# Shift raster upwards
|
|
rast.origin.y = 2
|
|
# The raster in the model is not strictly below
|
|
qs = RasterModel.objects.filter(rast__strictly_below=rast)
|
|
self.assertEqual(qs.count(), 0)
|
|
# Shift raster further upwards
|
|
rast.origin.y = 6
|
|
# The raster in the model is strictly below
|
|
qs = RasterModel.objects.filter(rast__strictly_below=rast)
|
|
self.assertEqual(qs.count(), 1)
|
|
|
|
def test_lookup_with_polygonized_raster(self):
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
# Move raster to overlap with the model point on the left side
|
|
rast.origin.x = -95.37040 + 1
|
|
rast.origin.y = 29.70486
|
|
# Raster overlaps with point in model
|
|
qs = RasterModel.objects.filter(geom__intersects=rast)
|
|
self.assertEqual(qs.count(), 1)
|
|
# Change left side of raster to be nodata values
|
|
rast.bands[0].data(data=[0, 0, 0, 1, 1], shape=(5, 1))
|
|
rast.bands[0].nodata_value = 0
|
|
qs = RasterModel.objects.filter(geom__intersects=rast)
|
|
# Raster does not overlap anymore after polygonization
|
|
# where the nodata zone is not included.
|
|
self.assertEqual(qs.count(), 0)
|
|
|
|
def test_lookup_value_error(self):
|
|
# Test with invalid dict lookup parameter
|
|
obj = dict()
|
|
msg = "Couldn't create spatial object from lookup value '%s'." % obj
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
RasterModel.objects.filter(geom__intersects=obj)
|
|
# Test with invalid string lookup parameter
|
|
obj = '00000'
|
|
msg = "Couldn't create spatial object from lookup value '%s'." % obj
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
RasterModel.objects.filter(geom__intersects=obj)
|
|
|
|
def test_db_function_errors(self):
|
|
"""
|
|
Errors are raised when using DB functions with raster content.
|
|
"""
|
|
point = GEOSGeometry("SRID=3086;POINT (-697024.9213808845 683729.1705516104)")
|
|
rast = GDALRaster(json.loads(JSON_RASTER))
|
|
msg = "Please provide a geometry object."
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
RasterModel.objects.annotate(distance_from_point=Distance("geom", rast))
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
RasterModel.objects.annotate(distance_from_point=Distance("rastprojected", rast))
|
|
msg = "Geometry functions not supported for raster fields."
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
RasterModel.objects.annotate(distance_from_point=Distance("rastprojected", point)).count()
|