Where do I find the command prompt in QGIS?
Open the Python Console by going to Plugins ‣ Python Console. You will see a new panel open at the bottom of QGIS canvas. You will see a prompt like >>> at the bottom where you can type commands.
How to access the current active layer in QGIS?
To access the currently active layer in QGIS, you can type the following and press Enter. This command fetches the reference to the currently loaded layer and stores it in the layer variable. There is a handy function called dir () in python that shows you all available methods for any object.
How to dissolving a layer in QGIS 3.4.5?
This is QGIS 3.4.5 EDIT – this is the code I ended up using: The layer exists as a memory layer on the QGIS layers list as “Spray_SHP” (note – this is not a shapefile – we’re doing everything in memory and not saving to disk). This will just get that layer and dissolve it to layer_dissolve_shp, then add it as ‘output’.
How to enable on the fly CRS transformation in QGIS?
Back in the main QGIS Window, click at the CRS button in the bottom-right corner. In the Project Properties | CRS dialog, check the Enable on-the-fly CRS transformation and select EPSG:3460 Fiji 1986 / Fiji Map Grid as the CRS. This will ensure that our original and reprojected layers will line up correctly.
What can you do with a QGIS program?
QGIS has a powerful programming interface that allows you to extend the core functionality of the software as well as write scripts to automate your tasks. QGIS supports the popular Python scripting language.
How to add a vector layer to QGIS?
Launch QGIS and go to Layer ‣ Add Layer ‣ Add Vector Layer. Browse to the folder containing the unzipped shapefiles and select the roads.shp file and click Open. First we must re-project the roads layer to a Projected CRS. This will allow us to use meters as units when performing analysis instead of degrees.