Question

我试图在QGIS 3.6中的线shapefile上运行一些工具，以消除几何图形错误并识别自相交。我让脚本工作，以便它输出2层：“ Cleaned_Lines”：删除了重复的几何形状和无效几何的线层，以及“ Intersections”：一个点shapefile，它指示线相交的区域。这些层被创建并作为临时层加载到QGIS中。我希望“ Cleaned_Lines”层自动保存到与输入行层相同的目录中。

 # Check validity
            alg_params = {
                'IGNORE_RING_SELF_INTERSECTION': False,
                'INPUT_LAYER': parameters['lines'],
                'METHOD': 2,
                'VALID_OUTPUT': QgsProcessing.TEMPORARY_OUTPUT
            }

            in_path = self.parameterDefinition('lines').valueAsPythonString(parameters['lines'], context)
            directory = os.path.dirname(in_path)
            output_path = os.path.join(os.path.dirname(in_path), "CleanedLines.shp'")

...

# Delete duplicate geometries
        alg_params = {
            'INPUT': outputs['CheckValidity']['VALID_OUTPUT'],
            'OUTPUT': parameters['CleanedLines']
        }

        cleaned = processing.run('qgis:deleteduplicategeometries', alg_params, context=context, feedback=feedback, is_child_algorithm=True)
        outputs['DeleteDuplicateGeometries'] = processing.run('qgis:deleteduplicategeometries', alg_params, context=context, feedback=feedback, is_child_algorithm=True)
        results['CleanedLines'] = outputs['DeleteDuplicateGeometries']['OUTPUT']

        cleaned_lines_layer = results['CleanedLines']
        print(cleaned_lines_layer)

        layer = QgsVectorLayer(cleaned_lines_layer, 'CleanedLines', 'ogr')

        if not os.path.isfile(output_path) or Overwrite_Results_Files:
            writer = QgsVectorFileWriter.writeAsVectorFormat(layer, output_path, 'CP1250', layer.crs(), 'ESRI Shapefile')

            cleaned_lines_layer = output_path

        layer = None

我将文件写出到变量“ output_path”指示的目录中，但它只是将其创建为临时层，脚本完成了。任何见识将不胜感激！

Answer 1

QgsVectorFileWriter.writeAsVectorFormat(layer, "output_path", "UTF-8", layer.crs(), "ESRI Shapefile")

我在没有作家的情况下使用了它，并且可以正常工作

保存生成的矢量层QGIS 3.6 python脚本

1 个答案: