我有一个包含作曲家的QGIS项目。当然,如果进入GUI,我可以将其导出为pdf等。对于我的make脚本,尽管我想通过python脚本来完成。通过在线阅读,这是我的尝试:
#!/usr/bin/env python
import sys
from qgis.gui import QgsMapCanvas, QgsLayerTreeMapCanvasBridge
from PyQt4.QtCore import QFileInfo
from PyQt4.QtXml import QDomDocument
from qgis.core import *
qgs = QgsApplication(sys.argv, True)
QgsApplication.setPrefixPath("/usr", True)
qgs.initQgis()
def make_pdf():
canvas = QgsMapCanvas()
bridge = QgsLayerTreeMapCanvasBridge(
QgsProject.instance().layerTreeRoot(), canvas)
bridge.setCanvasLayers()
QgsProject.instance().read(QFileInfo('../board.qgs'))
composition = QgsComposition(canvas.mapSettings())
map_item = composition.getComposerItemById('board36x48')
map_item.setMapCanvas(canvas)
map_item.zoomToExtent(canvas.extent())
composition.refreshItems()
composition.exportAsPDF('generated/board.pdf')
QgsProject.instance().clear()
make_pdf()
这将失败,特别是:
i:./assets/generate_board
QGraphicsScene::addItem: item has already been added to this scene
Traceback (most recent call last):
File "./assets/generate_board", line 30, in <module>
make_pdf()
File "./assets/generate_board", line 24, in make_pdf
map_item.setMapCanvas(canvas)
AttributeError: 'NoneType' object has no attribute 'setMapCanvas'
我基于使用Python(不更改可见布局中的任何内容)将“打印打印/地图QGIS编辑器”视图保存为PNG / PDF?但对其进行了修改,以尽可能简化。好像我在此过程中破坏了某些东西...我没有此模板文件。我简单地拥有一个带composer board36x48的board.qgs项目文件。有任何想法吗?
您可能会在Maps_printer插件中找到一些有用的代码:github.com/DelazJ/MapsPrinter/wiki。寻找def saveFile(self):、 def printToRaster(自身,cView,文件夹,名称,ext):、 def exportCompo(自身,cView,文件夹,标题,扩展名):
—
gisnside
你有工作吗?
—
Hugo Roussaffa-GeoDatup
qgs = QgsApplication(sys.argv, True)
与app = QtGui.QApplication(sys.argv, True)
和qgs.initQgis()
用QgsApplication.initQgis()
?