本文整理汇总了Python中qgis.core.QgsJSONExporter.exportFeatures方法的典型用法代码示例。如果您正苦于以下问题：Python QgsJSONExporter.exportFeatures方法的具体用法？Python QgsJSONExporter.exportFeatures怎么用？Python QgsJSONExporter.exportFeatures使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsJSONExporter的用法示例。
在下文中一共展示了QgsJSONExporter.exportFeatures方法的1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，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testExportFeatures
# 需要导入模块: from qgis.core import QgsJSONExporter [as 别名]
# 或者: from qgis.core.QgsJSONExporter import exportFeatures [as 别名]
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(QgsPointV2(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(QgsPointV2(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)