Writing Conditional in QGIS raster calculator

How to do raster calculation in QGIS? To add a raster to the raster calculator expression field, double click its name in the Fields list. You can then use the operators to construct calculation expressions, or you can just type them into the box. In the Result layer section, you will need to define an

Error message when trying to create a new layer using the Spatial Query tool

How do I create a new layer in QGIS? Open QGIS and create a new blank project. Navigate to and click on the menu entry Layer ► Create Layer ► New Shapefile Layer. You’ll be presented with the New Shapefile Layer dialog, which will allow you to define a new layer.  How to use spatial

Find angle between two lines features that share a point

How do you find the angle between two lines? The simplest formula to find the angle between the two lines is from the slope of the two lines. The angle between two lines with slopes m1 m 1 , and m2 m 2 respectively is Tanθ = m1−m21+m1. How do you find the angle between

Subtract lines from lines in QGIS

How do I subtract one layer from another in Qgis? How can I do this? If both polygons are separate features, you can delete the small one via the Attribute Table (right-click the layer), toggle the Editing icon (looks like a pencil), select the feature of the polygon you wanted deleted, then select Delete Feature.

How to digitize building footprints with orthogonal edges?

How do I digitize a building in QGIS? To start digitizing the field, Open the downloaded raster imagery using ‘Add Raster Layer’ tool . This Opens the image in the QGIS map space along with the newly created polygon shapefile. Check if the Digitizing tools are available in the toolbar, if not right-click on the

Adding label to whole group of drainage features using QGIS?

How do I add labels to features in Qgis? Here, you’ll use the Layer Properties dialog. Open the Layer Properties dialog by double-clicking on the places layer. Select the Labels tab. Make sure Text is selected in the left-hand options list, then update the text formatting options to match those shown here: Click Apply. How

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