Python core.QgsMemoryProviderUtils类代码示例

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本文整理汇总了Python中qgis.core.QgsMemoryProviderUtils类的典型用法代码示例。如果您正苦于以下问题：Python QgsMemoryProviderUtils类的具体用法？Python QgsMemoryProviderUtils怎么用？Python QgsMemoryProviderUtils使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了QgsMemoryProviderUtils类的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Python代码示例。

示例1: test_make_features_compatible_geometry

    def test_make_features_compatible_geometry(self):
        """Test corner cases for geometries"""

        # Make a feature with no geometry
        layer = self._make_layer('Point')
        self.assertTrue(layer.isValid())
        self.assertTrue(layer.startEditing())
        f1 = QgsFeature(layer.fields())
        f1.setAttributes([1])

        # Check that it is accepted on a Point layer
        new_features = make_features_compatible([f1], layer)
        self.assertEqual(len(new_features), 1)
        self.assertEqual(new_features[0].geometry().asWkt(), '')

        # Make a geometry-less layer
        nogeom_layer = QgsMemoryProviderUtils.createMemoryLayer(
            'nogeom_layer', layer.fields(), QgsWkbTypes.NoGeometry, QgsCoordinateReferenceSystem(4326))
        # Check that a geometry-less feature is accepted
        new_features = make_features_compatible([f1], nogeom_layer)
        self.assertEqual(len(new_features), 1)
        self.assertEqual(new_features[0].geometry().asWkt(), '')

        # Make a geometry-less layer
        nogeom_layer = QgsMemoryProviderUtils.createMemoryLayer(
            'nogeom_layer', layer.fields(), QgsWkbTypes.NoGeometry, QgsCoordinateReferenceSystem(4326))
        # Check that a Point feature is accepted but geometry was dropped
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
        new_features = make_features_compatible([f1], nogeom_layer)
        self.assertEqual(len(new_features), 1)
        self.assertEqual(new_features[0].geometry().asWkt(), '')

开发者ID:anitagraser，项目名称:QGIS，代码行数:31，代码来源:test_qgsprocessinginplace.py

示例2: test_clip

    def test_clip(self):

        mask_layer = QgsMemoryProviderUtils.createMemoryLayer(
            'mask_layer', self.vl.fields(), QgsWkbTypes.Polygon, QgsCoordinateReferenceSystem(4326))
        self.assertTrue(mask_layer.isValid())
        self.assertTrue(mask_layer.startEditing())
        f = QgsFeature(mask_layer.fields())
        f.setAttributes([1])
        f.setGeometry(QgsGeometry.fromWkt('POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))'))
        self.assertTrue(f.isValid())
        f2 = QgsFeature(mask_layer.fields())
        f2.setAttributes([1])
        f2.setGeometry(QgsGeometry.fromWkt('POLYGON((1.1 1.1, 1.1 2.1, 2.1 2.1, 2.1 1.1, 1.1 1.1))'))
        self.assertTrue(f2.isValid())
        self.assertTrue(mask_layer.addFeatures([f, f2]))
        mask_layer.commitChanges()
        mask_layer.rollBack()

        clip_layer = QgsMemoryProviderUtils.createMemoryLayer(
            'clip_layer', self.vl.fields(), QgsWkbTypes.LineString, QgsCoordinateReferenceSystem(4326))
        self.assertTrue(clip_layer.isValid())
        self.assertTrue(clip_layer.startEditing())
        f = QgsFeature(clip_layer.fields())
        f.setAttributes([1])
        f.setGeometry(QgsGeometry.fromWkt('LINESTRING(-1 -1, 3 3)'))
        self.assertTrue(f.isValid())
        self.assertTrue(clip_layer.addFeatures([f]))
        self.assertEqual(clip_layer.featureCount(), 1)
        clip_layer.commitChanges()
        clip_layer.selectAll()
        clip_layer.rollBack()

        QgsProject.instance().addMapLayers([clip_layer, mask_layer])

        old_features, new_features = self._alg_tester(
            'native:clip',
            clip_layer,
            {
                'OVERLAY': mask_layer.id(),
            }
        )

        self.assertEqual(len(new_features), 2)
        self.assertEqual(new_features[0].geometry().asWkt(), 'LineString (0 0, 1 1)')
        self.assertEqual(new_features[0].attributes(), [1])

开发者ID:anitagraser，项目名称:QGIS，代码行数:45，代码来源:test_qgsprocessinginplace.py

示例3: _make_layer

 def _make_layer(self, layer_wkb_name):
     fields = QgsFields()
     wkb_type = getattr(QgsWkbTypes, layer_wkb_name)
     fields.append(QgsField('int_f', QVariant.Int))
     layer = QgsMemoryProviderUtils.createMemoryLayer(
         '%s_layer' % layer_wkb_name, fields, wkb_type, QgsCoordinateReferenceSystem(4326))
     self.assertTrue(layer.isValid())
     self.assertEqual(layer.wkbType(), wkb_type)
     return layer

开发者ID:dmarteau，项目名称:QGIS，代码行数:9，代码来源:CheckValidityAlgorithm.py

示例4: testCreateMemoryLayer

    def testCreateMemoryLayer(self):
        """
        Test QgsMemoryProviderUtils.createMemoryLayer()
        """

        # no fields
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', QgsFields())
        self.assertTrue(layer.isValid())
        self.assertEqual(layer.name(), 'my name')
        self.assertTrue(layer.fields().isEmpty())

        # similar layers should have unique sources
        layer2 = QgsMemoryProviderUtils.createMemoryLayer('my name', QgsFields())
        self.assertNotEqual(layer.source(), layer2.source())

        # geometry type
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', QgsFields(), QgsWkbTypes.Point)
        self.assertTrue(layer.isValid())
        self.assertEqual(layer.wkbType(), QgsWkbTypes.Point)
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', QgsFields(), QgsWkbTypes.PolygonZM)
        self.assertTrue(layer.isValid())
        self.assertEqual(layer.wkbType(), QgsWkbTypes.PolygonZM)

        # crs
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', QgsFields(), QgsWkbTypes.PolygonZM, QgsCoordinateReferenceSystem.fromEpsgId(3111))
        self.assertTrue(layer.isValid())
        self.assertEqual(layer.wkbType(), QgsWkbTypes.PolygonZM)
        self.assertTrue(layer.crs().isValid())
        self.assertEqual(layer.crs().authid(), 'EPSG:3111')

        # fields
        fields = QgsFields()
        fields.append(QgsField("string", QVariant.String))
        fields.append(QgsField("long", QVariant.LongLong))
        fields.append(QgsField("double", QVariant.Double))
        fields.append(QgsField("integer", QVariant.Int))
        fields.append(QgsField("date", QVariant.Date))
        fields.append(QgsField("datetime", QVariant.DateTime))
        fields.append(QgsField("time", QVariant.Time))
        fields.append(QgsField("#complex_name", QVariant.String))
        fields.append(QgsField("complex/name", QVariant.String))
        fields.append(QgsField("binaryfield", QVariant.ByteArray))
        fields.append(QgsField("boolfield", QVariant.Bool))
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', fields)
        self.assertTrue(layer.isValid())
        self.assertFalse(layer.fields().isEmpty())
        self.assertEqual(len(layer.fields()), len(fields))
        for i in range(len(fields)):
            self.assertEqual(layer.fields()[i].name(), fields[i].name())
            self.assertEqual(layer.fields()[i].type(), fields[i].type())

        # unsupported field type
        fields = QgsFields()
        fields.append(QgsField("rect", QVariant.RectF))
        layer = QgsMemoryProviderUtils.createMemoryLayer('my name', fields)
        self.assertTrue(layer.isValid())
        self.assertFalse(layer.fields().isEmpty())
        self.assertEqual(layer.fields()[0].name(), 'rect')
        self.assertEqual(layer.fields()[0].type(), QVariant.String) # should be mapped to string

开发者ID:aaime，项目名称:QGIS，代码行数:59，代码来源:test_provider_memory.py

示例5: setUpClass

    def setUpClass(cls):
        """Run before all tests"""
        QCoreApplication.setOrganizationName("QGIS_Test")
        QCoreApplication.setOrganizationDomain(
            "QGIS_TestPyQgsProcessingInPlace.com")
        QCoreApplication.setApplicationName("QGIS_TestPyQgsProcessingInPlace")
        QgsSettings().clear()
        Processing.initialize()
        QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
        cls.registry = QgsApplication.instance().processingRegistry()
        fields = QgsFields()
        fields.append(QgsField('int_f', QVariant.Int))
        cls.vl = QgsMemoryProviderUtils.createMemoryLayer(
            'mylayer', fields, QgsWkbTypes.Point, QgsCoordinateReferenceSystem(4326))

        f1 = QgsFeature(cls.vl.fields())
        f1['int_f'] = 1
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
        f2 = QgsFeature(cls.vl.fields())
        f2['int_f'] = 2
        f2.setGeometry(QgsGeometry.fromWkt('Point(9.5 45.6)'))
        cls.vl.dataProvider().addFeatures([f1, f2])

        assert cls.vl.isValid()
        assert cls.vl.featureCount() == 2

        # Multipolygon layer

        cls.multipoly_vl = QgsMemoryProviderUtils.createMemoryLayer(
            'mymultiplayer', fields, QgsWkbTypes.MultiPolygon, QgsCoordinateReferenceSystem(4326))

        f3 = QgsFeature(cls.multipoly_vl.fields())
        f3.setGeometry(QgsGeometry.fromWkt('MultiPolygon (((2.81856297539240419 41.98170998812887689, 2.81874467773035464 41.98167537995160359, 2.81879535908157752 41.98154066615795443, 2.81866433873670452 41.98144056064155905, 2.81848263699778379 41.98147516865246587, 2.81843195500470811 41.98160988234612034, 2.81856297539240419 41.98170998812887689)),((2.81898589063455907 41.9815711567298635, 2.81892080450418803 41.9816030048432367, 2.81884192631866437 41.98143737613141724, 2.8190679469505846 41.98142270931093378, 2.81898589063455907 41.9815711567298635)))'))
        f4 = QgsFeature(cls.multipoly_vl.fields())
        f4.setGeometry(QgsGeometry.fromWkt('MultiPolygon (((2.81823679385631332 41.98133290154246566, 2.81830770255185703 41.98123540208609228, 2.81825871989355159 41.98112524362621656, 2.81813882853970243 41.98111258462271422, 2.81806791984415872 41.98121008407908761, 2.81811690250246416 41.98132024253896333, 2.81823679385631332 41.98133290154246566)),((2.81835835162010895 41.98123286963267731, 2.8183127674586852 41.98108725356146209, 2.8184520523963692 41.98115436357689134, 2.81835835162010895 41.98123286963267731)))'))
        cls.multipoly_vl.dataProvider().addFeatures([f3, f4])

        assert cls.multipoly_vl.isValid()
        assert cls.multipoly_vl.featureCount() == 2

        QgsProject.instance().addMapLayers([cls.vl, cls.multipoly_vl])

开发者ID:anitagraser，项目名称:QGIS，代码行数:41，代码来源:test_qgsprocessinginplace.py

示例6: test_make_features_compatible_different_field_length

    def test_make_features_compatible_different_field_length(self):
        """Test regression #21497"""
        fields = QgsFields()
        fields.append(QgsField('int_f1', QVariant.Int))
        f1 = QgsFeature(fields)
        f1.setAttributes([12345])
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))

        fields = QgsFields()
        fields.append(QgsField('int_f2', QVariant.Int))
        fields.append(QgsField('int_f1', QVariant.Int))
        vl2 = QgsMemoryProviderUtils.createMemoryLayer(
            'mymultiplayer', fields, QgsWkbTypes.Point, QgsCoordinateReferenceSystem(4326))
        new_features = QgsVectorLayerUtils.makeFeaturesCompatible([f1], vl2)
        self.assertEqual(new_features[0].attributes(), [None, 12345])

        f1.setGeometry(QgsGeometry.fromWkt('MultiPoint((9 45))'))
        new_features = QgsVectorLayerUtils.makeFeaturesCompatible([f1], vl2)
        self.assertEqual(new_features[0].attributes(), [None, 12345])

开发者ID:alexbruy，项目名称:QGIS，代码行数:19，代码来源:test_qgsprocessinginplace.py

示例7: test_make_features_compatible_attributes

    def test_make_features_compatible_attributes(self):
        """Test corner cases for attributes"""

        # Test feature without attributes
        fields = QgsFields()
        fields.append(QgsField('int_f', QVariant.Int))
        fields.append(QgsField('str_f', QVariant.String))
        layer = QgsMemoryProviderUtils.createMemoryLayer(
            'mkfca_layer', fields, QgsWkbTypes.Point, QgsCoordinateReferenceSystem(4326))
        self.assertTrue(layer.isValid())
        f1 = QgsFeature(layer.fields())
        f1['int_f'] = 1
        f1['str_f'] = 'str'
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
        new_features = make_features_compatible([f1], layer)
        self.assertEqual(new_features[0].attributes(), f1.attributes())
        self.assertTrue(new_features[0].geometry().asWkt(), f1.geometry().asWkt())

        # Test pad with 0 with fields
        f1.setAttributes([])
        new_features = make_features_compatible([f1], layer)
        self.assertEqual(len(new_features[0].attributes()), 2)
        self.assertEqual(new_features[0].attributes()[0], QVariant())
        self.assertEqual(new_features[0].attributes()[1], QVariant())

        # Test pad with 0 without fields
        f1 = QgsFeature()
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
        new_features = make_features_compatible([f1], layer)
        self.assertEqual(len(new_features[0].attributes()), 2)
        self.assertEqual(new_features[0].attributes()[0], QVariant())
        self.assertEqual(new_features[0].attributes()[1], QVariant())

        # Test drop extra attrs
        f1 = QgsFeature(layer.fields())
        f1.setAttributes([1, 'foo', 'extra'])
        f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
        new_features = make_features_compatible([f1], layer)
        self.assertEqual(len(new_features[0].attributes()), 2)
        self.assertEqual(new_features[0].attributes()[0], 1)
        self.assertEqual(new_features[0].attributes()[1], 'foo')

开发者ID:anitagraser，项目名称:QGIS，代码行数:41，代码来源:test_qgsprocessinginplace.py

示例8: parse


#.........这里部分代码省略.........
                    h_store = QgsHstoreUtils.parse(attributes)
                    for key in h_store.keys():
                        if key not in layers[layer]['tags']:
                            # If the key in OSM is not already in the table
                            if self.__whiteListColumn[layer]:
                                if key in self.__whiteListColumn[layer]:
                                    layers[layer]['tags'].append(key)
                            else:
                                layers[layer]['tags'].append(key)

                percent = int(100 / len(self.__layers) * (i + 1))
                self.signalPercentage.emit(percent)

        # Delete empty layers if this option is set to True
        if self.__deleteEmptyLayers:
            delete_layers = []
            for keys, values in layers.items():
                if values['featureCount'] < 1:
                    delete_layers.append(keys)
            for layer in delete_layers:
                del layers[layer]

        # Creating GeoJSON files for each layers
        for layer in self.__layers:
            msg = tr('Creating memory layer : ' + layer)
            self.signalText.emit(msg)
            self.signalPercentage.emit(0)

            # Adding the attribute table
            fields = QgsFields()
            for key in layers[layer]['tags']:
                fields.append(QgsField(key, QVariant.String))

            layers[layer]['vector_layer'] = QgsMemoryProviderUtils.createMemoryLayer(
                layer,
                fields,
                layers[layer]['geomType'],
                layers[layer]['vectorLayer'].crs())
            layers[layer]['vector_layer'].startEditing()

            # Foreach feature in the layer
            features = layers[layer]['vectorLayer'].getFeatures()
            for i, feature in enumerate(features):
                fet = QgsFeature()
                fet.setGeometry(feature.geometry())

                new_attributes = []
                attributes = feature.attributes()

                if layer in ['points', 'lines', 'multilinestrings']:
                    if layer == 'points':
                        osm_type = "node"
                    elif layer == 'lines':
                        osm_type = "way"
                    elif layer == 'multilinestrings':
                        osm_type = 'relation'

                    new_attributes.append(
                        self.DIC_OSM_TYPE[osm_type] + str(attributes[0]))
                    new_attributes.append(attributes[0])
                    new_attributes.append(osm_type)

                    if attributes[1]:
                        h_store = QgsHstoreUtils.parse(str(attributes[1]))
                        for tag in layers[layer]['tags'][3:]:
                            if str(tag) in h_store:

开发者ID:3liz，项目名称:QuickOSM，代码行数:67，代码来源:osm_parser.py

注：本文中的qgis.core.QgsMemoryProviderUtils类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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Python core.QgsMemoryProviderUtils类代码示例

示例1: test_make_features_compatible_geometry

示例2: test_clip

示例3: _make_layer

示例4: testCreateMemoryLayer

示例5: setUpClass

示例6: test_make_features_compatible_different_field_length

示例7: test_make_features_compatible_attributes

示例8: parse

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