Once the query is complete, you will see a new section namedSelected features. Click on theCreate layer with selectedbutton. A new layer will be added to theLayers Panel. ClickClose. Zoom-in to any area and compare the results. You will notice that the new layer contains only the feature...
layer = canvas.layer(0) 然后,试着获取一些信息看看。 # 获取图层支持的诸如「添加/删除要素」、「创建索引」等操作字符串 layer.capabilitiesString() # 返回示例:u'Add Features, Delete Features, Change Attribute Values, Add Attributes, Delete Attributes, Rename Attributes, Create Spatial Index, Create A...
filename=self.dlg.lineEdit.text()output_file=open(filename,'w')selectedLayerIndex=self.dlg.comboBox.currentIndex()selectedLayer=layers[selectedLayerIndex]fields=selectedLayer.pendingFields()fieldnames=[field.name()forfieldinfields]forfinselectedLayer.getFeatures():line=','.join(unicode(f[x])forxin...
layer =QGisLayers.getObjectFromUri(orgFilename,False)iflayer: filename = LayerExporter.exportVectorLayer(layer)else: layer =QGisLayers.getObjectFromUri(orgFilename,False)iflayer: useSelection = SextanteConfig.getSetting(SextanteConfig.USE_SELECTED)ifuseSelectionandlayer.selectedFeatureCount() !=0: file...
The old “Trajectories from point layer”, “Add heading to points”, and “Add speed (m/s) to points” algorithms have been superseded by the new“Create trajectories”algorithm which automatically computes speeds and headings when creating the trajectory outputs. ...
have my layer of the MySQL view activated Go to select features by polygon Create a polygon selection Only some of them are selected, and other features are selected instead which may be kilometers away despite in my zoom level I have only some meters in scale. ...
在 ArcGIS JS API 的开发中， FeatureLayer 可以说是让人又爱又恨， 特别是 ArcGIS JS API 4.x ，...
To reproduce the issue, create a simple point layer with two fields using the following settings: The desired behaviour of the function is that each new feature created would result in a default value forpt_numthat increases in value based on the highest value for that field compared to other...
Clicking “Modify selected features” will apply the operation to the features: All edits will be added to the layer’s “edit buffer”, so you can easily undo and redo the changes before saving them back to the data source. (There’ll be a range of “smarts” in place to ensure that...
This time, make sure you check the Selected features only box. Choose SUBREGION as the Dissolve field and POP_EST as the Sum field. Once the processing finishes, click Close and switch back to the main QGIS window. You will notice a new layer with only the selected features dissolved. ...