本文整理汇总了Python中qgis.core.QgsJSONUtils.stringToFeatureList方法的典型用法代码示例。如果您正苦于以下问题：Python QgsJSONUtils.stringToFeatureList方法的具体用法？Python QgsJSONUtils.stringToFeatureList怎么用？Python QgsJSONUtils.stringToFeatureList使用的例子？那么恭喜您, 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.QgsJSONUtils的用法示例。
在下文中一共展示了QgsJSONUtils.stringToFeatureList方法的2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: testStringToFeatureList
# 需要导入模块: from qgis.core import QgsJSONUtils [as 别名]
# 或者: from qgis.core.QgsJSONUtils import stringToFeatureList [as 别名]
def testStringToFeatureList(self):
"""Test converting json string to features"""
fields = QgsFields()
fields.append(QgsField("name", QVariant.String))
# empty string
features = QgsJSONUtils.stringToFeatureList("", fields, codec)
self.assertEqual(features, [])
# bad string
features = QgsJSONUtils.stringToFeatureList("asdasdas", fields, codec)
self.assertEqual(features, [])
# geojson string with 1 feature
features = QgsJSONUtils.stringToFeatureList(
'{\n"type": "Feature","geometry": {"type": "Point","coordinates": [125, 10]},"properties": {"name": "Dinagat Islands"}}',
fields,
codec,
)
self.assertEqual(len(features), 1)
self.assertFalse(features[0].geometry().isEmpty())
self.assertEqual(features[0].geometry().wkbType(), QgsWkbTypes.Point)
point = features[0].geometry().geometry()
self.assertEqual(point.x(), 125.0)
self.assertEqual(point.y(), 10.0)
self.assertEqual(features[0]["name"], "Dinagat Islands")
# geojson string with 2 features
features = QgsJSONUtils.stringToFeatureList(
'{ "type": "FeatureCollection","features":[{\n"type": "Feature","geometry": {"type": "Point","coordinates": [125, 10]},"properties": {"name": "Dinagat Islands"}}, {\n"type": "Feature","geometry": {"type": "Point","coordinates": [110, 20]},"properties": {"name": "Henry Gale Island"}}]}',
fields,
codec,
)
self.assertEqual(len(features), 2)
self.assertFalse(features[0].geometry().isEmpty())
self.assertEqual(features[0].geometry().wkbType(), QgsWkbTypes.Point)
point = features[0].geometry().geometry()
self.assertEqual(point.x(), 125.0)
self.assertEqual(point.y(), 10.0)
self.assertEqual(features[0]["name"], "Dinagat Islands")
self.assertFalse(features[1].geometry().isEmpty())
self.assertEqual(features[1].geometry().wkbType(), QgsWkbTypes.Point)
point = features[1].geometry().geometry()
self.assertEqual(point.x(), 110.0)
self.assertEqual(point.y(), 20.0)
self.assertEqual(features[1]["name"], "Henry Gale Island")示例2: QgsFeature
# 需要导入模块: from qgis.core import QgsJSONUtils [as 别名]
# 或者: from qgis.core.QgsJSONUtils import stringToFeatureList [as 别名]
for f in fields_list:
fields.append(f)
feature = QgsFeature(fields)
feature.setGeometry(QgsGeometry.fromPoint(QgsPoint(60, 5)))
feature.setAttributes(["George", 34, 1.69])
# Exports all attributes from a QgsFeature as a JSON map type.
with codecs.open('feature.json', 'wb', encoding='utf-8') as f:
json_text = QgsJSONUtils.exportAttributes(feature)
f.write(json_text)
# Attempts to retrieve the fields from a GeoJSON string representing a
# collection of features.
fields = QgsJSONUtils.stringToFields(
geojson_contributors_string,
QTextCodec.codecForName('UTF-8')
)
for f in fields:
print(f.name(), f.type())
# Attempts to parse a GeoJSON string to a collection of features.
features = QgsJSONUtils.stringToFeatureList(
geojson_contributors_string,
fields,
QTextCodec.codecForName('UTF-8')
)
print(features)