Python core.QgsJsonExporter类代码示例

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本文整理汇总了Python中qgis.core.QgsJsonExporter类的典型用法代码示例。如果您正苦于以下问题：Python QgsJsonExporter类的具体用法？Python QgsJsonExporter怎么用？Python QgsJsonExporter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QgsJsonExporter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: testExportFeatureFieldFormatter

    def testExportFeatureFieldFormatter(self):
        """ Test exporting a feature with formatting fields """

        # source layer
        source = QgsVectorLayer("Point?field=fldtxt:string&field=fldint:integer",
                                "parent", "memory")
        pr = source.dataProvider()
        pf1 = QgsFeature()
        pf1.setFields(source.fields())
        pf1.setAttributes(["test1", 1])
        pf2 = QgsFeature()
        pf2.setFields(source.fields())
        pf2.setAttributes(["test2", 2])
        assert pr.addFeatures([pf1, pf2])

        setup = QgsEditorWidgetSetup('ValueMap', {"map": {"one": 1, "two": 2, "three": 3}})
        source.setEditorWidgetSetup(1, setup)

        exporter = QgsJsonExporter()
        exporter.setVectorLayer(source)

        expected = """{
   "type":"Feature",
   "id":0,
   "geometry":null,
   "properties":{
      "fldtxt":"test1",
      "fldint":"one"
   }
}"""
        self.assertEqual(exporter.exportFeature(pf1), expected)

开发者ID:，项目名称:，代码行数:31，代码来源:

示例2: testExportFieldAlias

    def testExportFieldAlias(self):
        """ Test exporting a feature with fields' alias """

        # source layer
        source = QgsVectorLayer("Point?field=fldtxt:string&field=fldint:integer",
                                "parent", "memory")
        pr = source.dataProvider()
        pf1 = QgsFeature()
        pf1.setFields(source.fields())
        pf1.setAttributes(["test1", 1])
        pf2 = QgsFeature()
        pf2.setFields(source.fields())
        pf2.setAttributes(["test2", 2])
        assert pr.addFeatures([pf1, pf2])

        source.setFieldAlias(0, "alias_fldtxt")
        source.setFieldAlias(1, "alias_fldint")

        exporter = QgsJsonExporter()
        exporter.setVectorLayer(source)

        expected = """{
   "type":"Feature",
   "id":0,
   "geometry":null,
   "properties":{
      "alias_fldtxt":"test1",
      "alias_fldint":1
   }
}"""
        self.assertEqual(exporter.exportFeature(pf1), expected)

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

示例3: layer_geom

def layer_geom(layer):
    featureList = []

    if layer.featureCount() > settings.PROJESTIONS_MAX_FEATURES:
        # If too many features, randomly select some
        import processing
        processing.run('qgis:randomselection', {
            'INPUT': layer,
            'METHOD': 0,
            'NUMBER': settings.PROJESTIONS_MAX_FEATURES,
        }, feedback=QgsProcessingFeedback())
        featureList = layer.selectedFeatures()
        layer.removeSelection()
    else:
        # Else get all of the features
        feature = QgsFeature()
        iterator = layer.getFeatures()
        while iterator.nextFeature(feature):
            feature.setGeometry(feature.geometry().simplify(0.1))
            featureList.append(feature)
            feature = QgsFeature()

    exporter = QgsJsonExporter(layer, 6)
    exporter.setExcludedAttributes(layer.attributeList())
    return exporter.exportFeatures(featureList)

开发者ID:ebrelsford，项目名称:qgis-projestions，代码行数:25，代码来源:projestions_geoms.py

示例4: testExportFeaturesWithLocale_regression20053

    def testExportFeaturesWithLocale_regression20053(self):
        """ Test exporting feature export with range widgets and locale different than C
        Regression: https://issues.qgis.org/issues/20053 - decimal separator in csv files
        """

        source = QgsVectorLayer("Point?field=name:string&field=cost:double&field=population:int&field=date:date",
                                "parent", "memory")
        self.assertTrue(source.isValid())
        fields = source.fields()

        feature = QgsFeature(fields, 5)
        feature.setGeometry(QgsGeometry(QgsPoint(5, 6)))
        feature.setAttributes(['Valsier Peninsula', 6.8, 198000, '2018-09-10'])

        exporter = QgsJsonExporter()

        # single feature
        expected = """{
  "features": [
    {
      "geometry": {
        "coordinates": [
          5.0,
          6.0
        ],
        "type": "Point"
      },
      "id": 5,
      "properties": {
        "cost": 6.8,
        "date": "2018-09-10",
        "name": "Valsier Peninsula",
        "population": 198000
      },
      "type": "Feature"
    }
  ],
  "type": "FeatureCollection"
}"""
        self.assertEqual(exporter.exportFeatures([feature], 2), expected)

        setup = QgsEditorWidgetSetup('Range', {
            'AllowNull': True,
            'Max': 2147483647,
            'Min': -2147483648,
            'Precision': 4,
            'Step': 1,
            'Style': 'SpinBox'
        }
        )
        source.setEditorWidgetSetup(1, setup)
        source.setEditorWidgetSetup(2, setup)

        QLocale.setDefault(QLocale('it'))
        exporter.setVectorLayer(source)
        self.assertEqual(exporter.exportFeatures([feature], 2), expected)

开发者ID:m-kuhn，项目名称:QGIS，代码行数:56，代码来源:test_qgsjsonutils.py

示例5: testExportFeatures

    def testExportFeatures(self):
        """ Test exporting feature collections """

        fields = QgsFields()
        fields.append(QgsField("name", QVariant.String))
        fields.append(QgsField("cost", QVariant.Double))
        fields.append(QgsField("population", QVariant.Int))

        feature = QgsFeature(fields, 5)
        feature.setGeometry(QgsGeometry(QgsPoint(5, 6)))
        feature.setAttributes(['Valsier Peninsula', 6.8, 198])

        exporter = QgsJsonExporter()

        # single feature
        expected = """{ "type": "FeatureCollection",
    "features":[
{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5, 6]},
   "properties":{
      "name":"Valsier Peninsula",
      "cost":6.8,
      "population":198
   }
}
]}"""
        self.assertEqual(exporter.exportFeatures([feature]), expected)

        # multiple features
        feature2 = QgsFeature(fields, 6)
        feature2.setGeometry(QgsGeometry(QgsPoint(7, 8)))
        feature2.setAttributes(['Henry Gale Island', 9.7, 38])

        expected = """{ "type": "FeatureCollection",
    "features":[
{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5, 6]},
   "properties":{
      "name":"Valsier Peninsula",
      "cost":6.8,
      "population":198
   }
},
{
   "type":"Feature",
   "id":6,
   "geometry":
   {"type": "Point", "coordinates": [7, 8]},
   "properties":{
      "name":"Henry Gale Island",
      "cost":9.7,
      "population":38
   }
}
]}"""
        self.assertEqual(exporter.exportFeatures([feature, feature2]), expected)

开发者ID:，项目名称:，代码行数:62，代码来源:

示例6: testExportFeatureRelations

    def testExportFeatureRelations(self):
        """ Test exporting a feature with relations """

        #parent layer
        parent = QgsVectorLayer("Point?field=fldtxt:string&field=fldint:integer&field=foreignkey:integer",
                                "parent", "memory")
        pr = parent.dataProvider()
        pf1 = QgsFeature()
        pf1.setFields(parent.fields())
        pf1.setAttributes(["test1", 67, 123])
        pf2 = QgsFeature()
        pf2.setFields(parent.fields())
        pf2.setAttributes(["test2", 68, 124])
        assert pr.addFeatures([pf1, pf2])

        #child layer
        child = QgsVectorLayer(
            "Point?field=x:string&field=y:integer&field=z:integer",
            "referencedlayer", "memory")
        pr = child.dataProvider()
        f1 = QgsFeature()
        f1.setFields(child.fields())
        f1.setAttributes(["foo", 123, 321])
        f2 = QgsFeature()
        f2.setFields(child.fields())
        f2.setAttributes(["bar", 123, 654])
        f3 = QgsFeature()
        f3.setFields(child.fields())
        f3.setAttributes(["foobar", 124, 554])
        assert pr.addFeatures([f1, f2, f3])

        QgsProject.instance().addMapLayers([child, parent])

        rel = QgsRelation()
        rel.setId('rel1')
        rel.setName('relation one')
        rel.setReferencingLayer(child.id())
        rel.setReferencedLayer(parent.id())
        rel.addFieldPair('y', 'foreignkey')

        QgsProject.instance().relationManager().addRelation(rel)

        exporter = QgsJsonExporter()

        exporter.setVectorLayer(parent)
        self.assertEqual(exporter.vectorLayer(), parent)
        exporter.setIncludeRelated(True)
        self.assertEqual(exporter.includeRelated(), True)

        expected = """{
   "type":"Feature",
   "id":0,
   "geometry":null,
   "properties":{
      "fldtxt":"test1",
      "fldint":67,
      "foreignkey":123,
      "relation one":[{"x":"foo",
"y":123,
"z":321},
{"x":"bar",
"y":123,
"z":654}]
   }
}"""
        self.assertEqual(exporter.exportFeature(pf1), expected)

        expected = """{
   "type":"Feature",
   "id":0,
   "geometry":null,
   "properties":{
      "fldtxt":"test2",
      "fldint":68,
      "foreignkey":124,
      "relation one":[{"x":"foobar",
"y":124,
"z":554}]
   }
}"""
        self.assertEqual(exporter.exportFeature(pf2), expected)

        # with field formatter
        setup = QgsEditorWidgetSetup('ValueMap', {"map": {"apples": 123, "bananas": 124}})
        child.setEditorWidgetSetup(1, setup)
        expected = """{
   "type":"Feature",
   "id":0,
   "geometry":null,
   "properties":{
      "fldtxt":"test1",
      "fldint":67,
      "foreignkey":123,
      "relation one":[{"x":"foo",
"y":"apples",
"z":321},
{"x":"bar",
"y":"apples",
"z":654}]
   }
#.........这里部分代码省略.........

开发者ID:，项目名称:，代码行数:101，代码来源:

示例7: testExportFeatureCrs

    def testExportFeatureCrs(self):
        """ Test CRS transform when exporting features """

        exporter = QgsJsonExporter()
        self.assertFalse(exporter.sourceCrs().isValid())

        #test layer
        layer = QgsVectorLayer("Point?crs=epsg:3111&field=fldtxt:string",
                               "parent", "memory")
        exporter = QgsJsonExporter(layer)
        self.assertTrue(exporter.sourceCrs().isValid())
        self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')

        exporter.setSourceCrs(QgsCoordinateReferenceSystem(3857, QgsCoordinateReferenceSystem.EpsgCrsId))
        self.assertTrue(exporter.sourceCrs().isValid())
        self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3857')

        # vector layer CRS should override
        exporter.setVectorLayer(layer)
        self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')

        # test that exported feature is reprojected
        feature = QgsFeature(layer.fields(), 5)
        feature.setGeometry(QgsGeometry(QgsPoint(2502577, 2403869)))
        feature.setAttributes(['test point'])

        # low precision, only need rough coordinate to check and don't want to deal with rounding errors
        exporter.setPrecision(1)
        expected = """{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [145, -37.9]},
   "properties":{
      "fldtxt":"test point"
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)

开发者ID:，项目名称:，代码行数:38，代码来源:

示例8: testJSONExporter

    def testJSONExporter(self):
        """ test converting features to GeoJSON """
        fields = QgsFields()
        fields.append(QgsField("name", QVariant.String))
        fields.append(QgsField("cost", QVariant.Double))
        fields.append(QgsField("population", QVariant.Int))

        feature = QgsFeature(fields, 5)
        feature.setGeometry(QgsGeometry(QgsPoint(5, 6)))
        feature.setAttributes(['Valsier Peninsula', 6.8, 198])

        exporter = QgsJsonExporter()

        expected = """{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5, 6]},
   "properties":{
      "name":"Valsier Peninsula",
      "cost":6.8,
      "population":198
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)

        # test with linestring for bbox inclusion
        l = QgsLineString()
        l.setPoints([QgsPoint(5, 6), QgsPoint(15, 16)])
        feature.setGeometry(QgsGeometry(QgsLineString(l)))

        expected = """{
   "type":"Feature",
   "id":5,
   "bbox":[5, 6, 15, 16],
   "geometry":
   {"type": "LineString", "coordinates": [ [5, 6], [15, 16]]},
   "properties":{
      "name":"Valsier Peninsula",
      "cost":6.8,
      "population":198
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)

        # test that precision is respected
        feature.setGeometry(QgsGeometry(QgsPoint(5.444444444, 6.333333333)))
        exporter.setPrecision(3)
        self.assertEqual(exporter.precision(), 3)
        expected = """{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5.444, 6.333]},
   "properties":{
      "name":"Valsier Peninsula",
      "cost":6.8,
      "population":198
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)
        feature.setGeometry(QgsGeometry(QgsPoint(5, 6)))
        exporter.setPrecision(17)

        # test that attribute subset is respected
        exporter.setAttributes([0, 2])
        self.assertEqual(exporter.attributes(), [0, 2])
        expected = """{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5, 6]},
   "properties":{
      "name":"Valsier Peninsula",
      "population":198
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)

        exporter.setAttributes([1])
        self.assertEqual(exporter.attributes(), [1])
        expected = """{
   "type":"Feature",
   "id":5,
   "geometry":
   {"type": "Point", "coordinates": [5, 6]},
   "properties":{
      "cost":6.8
   }
}"""
        self.assertEqual(exporter.exportFeature(feature), expected)
        exporter.setAttributes([])

        # text excluding attributes

        exporter.setExcludedAttributes([1])
        self.assertEqual(exporter.excludedAttributes(), [1])
        expected = """{
   "type":"Feature",
   "id":5,
#.........这里部分代码省略.........

开发者ID:，项目名称:，代码行数:101，代码来源:

注：本文中的qgis.core.QgsJsonExporter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.QgsJsonExporter类代码示例

示例1: testExportFeatureFieldFormatter

示例2: testExportFieldAlias

示例3: layer_geom

示例4: testExportFeaturesWithLocale_regression20053

示例5: testExportFeatures

示例6: testExportFeatureRelations

示例7: testExportFeatureCrs

示例8: testJSONExporter

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