本文整理汇总了Python中qgis.core.QgsLayout.computeWorldFileParameters方法的典型用法代码示例。如果您正苦于以下问题：Python QgsLayout.computeWorldFileParameters方法的具体用法？Python QgsLayout.computeWorldFileParameters怎么用？Python QgsLayout.computeWorldFileParameters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.QgsLayout的用法示例。
在下文中一共展示了QgsLayout.computeWorldFileParameters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: TestQgsComposerMap
# 需要导入模块: from qgis.core import QgsLayout [as 别名]
# 或者: from qgis.core.QgsLayout import computeWorldFileParameters [as 别名]
#.........这里部分代码省略.........
overviewMap.setLayers([self.raster_layer])
self.layout.addLayoutItem(overviewMap)
# zoom in
myRectangle = QgsRectangle(192, -288, 320, -224)
self.map.setExtent(myRectangle)
myRectangle2 = QgsRectangle(0, -256, 256, 0)
overviewMap.setExtent(myRectangle2)
overviewMap.overview().setFrameMap(self.map)
overviewMap.overview().setInverted(False)
overviewMap.overview().setCentered(True)
checker = QgsLayoutChecker('composermap_overview_center', self.layout)
checker.setControlPathPrefix("composer_mapoverview")
myTestResult, myMessage = checker.testLayout()
self.layout.removeLayoutItem(overviewMap)
assert myTestResult, myMessage
def testMapCrs(self):
# create composition with composer map
map_settings = QgsMapSettings()
map_settings.setLayers([self.vector_layer])
layout = QgsLayout(QgsProject.instance())
layout.initializeDefaults()
# check that new maps inherit project CRS
QgsProject.instance().setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
map = QgsLayoutItemMap(layout)
map.attemptSetSceneRect(QRectF(20, 20, 200, 100))
map.setFrameEnabled(True)
rectangle = QgsRectangle(-13838977, 2369660, -8672298, 6250909)
map.setExtent(rectangle)
map.setLayers([self.vector_layer])
layout.addLayoutItem(map)
self.assertEqual(map.crs().authid(), 'EPSG:4326')
self.assertFalse(map.presetCrs().isValid())
# overwrite CRS
map.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
self.assertEqual(map.crs().authid(), 'EPSG:3857')
self.assertEqual(map.presetCrs().authid(), 'EPSG:3857')
checker = QgsLayoutChecker('composermap_crs3857', layout)
checker.setControlPathPrefix("composer_map")
result, message = checker.testLayout()
self.assertTrue(result, message)
# overwrite CRS
map.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
self.assertEqual(map.presetCrs().authid(), 'EPSG:4326')
self.assertEqual(map.crs().authid(), 'EPSG:4326')
rectangle = QgsRectangle(-124, 17, -78, 52)
map.zoomToExtent(rectangle)
checker = QgsLayoutChecker('composermap_crs4326', layout)
checker.setControlPathPrefix("composer_map")
result, message = checker.testLayout()
self.assertTrue(result, message)
# change back to project CRS
map.setCrs(QgsCoordinateReferenceSystem())
self.assertEqual(map.crs().authid(), 'EPSG:4326')
self.assertFalse(map.presetCrs().isValid())
def testuniqueId(self):
return
doc = QDomDocument()
documentElement = doc.createElement('ComposerItemClipboard')
self.layout.writeXml(documentElement, doc)
self.layout.addItemsFromXml(documentElement, doc)
# test if both composer maps have different ids
newMap = QgsComposerMap(self.layout, 0, 0, 10, 10)
mapList = self.layout.composerMapItems()
for mapIt in mapList:
if mapIt != self.map:
newMap = mapIt
break
oldId = self.map.id()
newId = newMap.id()
self.layout.removeComposerItem(newMap)
myMessage = 'old: %s new: %s' % (oldId, newId)
assert oldId != newId, myMessage
def testWorldFileGeneration(self):
return
myRectangle = QgsRectangle(781662.375, 3339523.125, 793062.375, 3345223.125)
self.map.setNewExtent(myRectangle)
self.map.setMapRotation(30.0)
self.layout.setGenerateWorldFile(True)
self.layout.setReferenceMap(self.map)
p = self.layout.computeWorldFileParameters()
pexpected = (4.180480199790922, 2.4133064516129026, 779443.7612381146,
2.4136013686911886, -4.179969388427311, 3342408.5663611)
ptolerance = (0.001, 0.001, 1, 0.001, 0.001, 1e+03)
for i in range(0, 6):
assert abs(p[i] - pexpected[i]) < ptolerance[i]