How to evaluate raster calculator expressions from the console?
Geographic Information SystemsHow do I use raster calculator 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
Merge line shapefiles
Geographic Information SystemsHow do I combine shapefiles into one? Click on the Vector menu, Data Management tools, Merge Shapefiles to OneProcess Select the folder where the two (or more) shapefiles you want to merge are located using the Browse button. Click browse next to Output shapefile, find your working folder, and name the output shapefile. Click OK.
Limit what is shown in the layer panel window under a categorized layer to that which is showing in the canvas extents in QGIS
Geographic Information SystemsHow do I show extents in QGIS? How can I identify the coordinates for the Map Extents of my QGIS Map? The cursor coordinates are shown in the centre of the Status bar. By clicking the mouse image to the right of the coordinates, you change the setting from the default – cursor coordinates –
Rename workbench on FME Server
Geographic Information SystemsWhat is an FME Workbench? FME Workbench is a visual workflow editor used for developing data transformation tools. When the Data Interoperability extension is enabled, you can use it to create spatial ETL tools and custom formats. How do I access FME Server? Step-by-Step Instructions Open FME Workbench. Open the workspace from part 2 in
QGIS area calculation
Geographic Information SystemsHow do I calculate area in QGIS? Open QGIS and load the shapefile containing the polygons that you want to measure. Select the layer containing the polygons in the Layers panel. Click the Field Calculator button in the Attributes toolbar. In the Field Calculator dialog, select the field that you want to use to store
How to set a fixed scale to a layer in ArcMap?
Geographic Information SystemsHow do I set a fixed scale in Arcgis? If the scale box on the Standard toolbar is disabled, the data frame may be set to a fixed extent or fixed scale. To enable the scale box, click View > Data Frame Properties to open the Data Frame Properties dialog box. Click the Data Frame
Distance between two cities at equal latitudes
Geographic Information SystemsEach degree of latitude is approximately 69 miles (111 kilometers) apart. How do you find the distance between two cities using latitude? Calculating the distance between latitude lines is easy because this distance never varies. If you treat the Earth as a sphere with a circumference of 25,000 miles, then one degree of latitude is
Is it possible to add rings using other polygons?
Geographic Information SystemsHow do I add a ring to a polygon in Qgis? Quote from video: So sometimes you have a polygon. But sometimes you want to create just a hole in the polygon. And that is where our rings. Come into play so let's go to edit. And we'll go to add ring. How do you
Merging all vector files within directory with QGIS?
Geographic Information SystemsHow do I merge Vector data in QGIS? Click on the Vector menu, Data Management tools, Merge Shapefiles to OneProcess Select the folder where the two (or more) shapefiles you want to merge are located using the Browse button. Click browse next to Output shapefile, find your working folder, and name the output shapefile. Click
Reprojecting layer in QGIS with python commands
Geographic Information SystemsHow do I Reproject a layer in Qgis? Steps for reprojecting a shapefile: Open QGIS 2.0 desktop. From the menu bar choose ‘Layers’ à ‘Add vector layer’. A dialog box opens, browse to the location of the required shapefile and click ‘Open’. A shapefile will be displayed on the workspace and the name of the