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How to load a raster layer using pyqgis?
The original command can be run successfully in QGIS python command line. Also, if I try to enter the code in python console, the layer.isValid () would return true. It is just not working in standalone script.
How to add a raster layer to a basemap?
Second part of adding raster layer from online data source is to add a raster layer from a TMS service. TMS or xyz layer type is frequently used to add a basemap such as google maps, Open Street Map (OSM), ESRI, etc. To add a xyz tile is the same with adding a WMS layer, we need a layer address (url) but with different parameters.
How to add a raster file to QGIS?
For example, the following code is adding a file with ecw format into QGIS. Other raster type like TIF, JPEG, etc also can be added to QGIS with the same expression. In figure 1 can be seen the raster file that already loaded into QGIS map canvas.
How to load a WMS layer using pyqgis?
Answer can be found here: https://gis.stackexchange.com/questions/120823/how-to-load-a-wms-layer-using-pyqgis. Basically, it is just a version problem. If you have qgis previous than v2.6, it would not work. But it is fixed for 2.6 If it is still not working for you, you most likely have problem for environment variable settings.
Where can I find the pyqgis developer cookbook?
More information can be found in the PyQGIS Developer Cookbook. From the menu, select Plugins -> Python Console, or Ctrl + Alt + P (Windows) You can type directly into the console, or select the pad and paper icon to write code in the editor.
How to create color ramp to symbolize raster?
The color ramp shader will define the new color ramp we create to symbolize the raster. First we’ll create and empty color ramp shader. We also need to set type of color ramp we want to use. Options are Interpolated , Discrete, or Exact. The data I’m using represent elevations, they are continuous data so I’ll use an Interpolated ramp.
Is there support for composer templates in QGIS?
Besides creating the composer items by hand, QGIS has support for composer templates which are essentially compositions with all their items saved to a .qpt file (with XML syntax). Unfortunately this functionality is not yet available in the API.
Why is the pyrsgis plugin missing from QGIS?
You are missing the pyrsgis python module, which must be required by that plugin. Please execute either CMD, PowerShell, or Windows Terminal as Admininstrator. Ensure QGIS is completely closed. Re-Launch QGIS and it should work, provided there are no other missing dependencies.
What to do if QGIS is missing OpenSSL?
Please execute either CMD, PowerShell, or Windows Terminal as Admininstrator. Ensure QGIS is completely closed. Re-Launch QGIS and it should work, provided there are no other missing dependencies. In response to your additional information above: You are also missing OpenSSL for Windows.
How to create a PostgreSQL connection with QGIS?
PostGIS database — data source is a string with all information needed to create a connection to PostgreSQL database. QgsDataSourceURI class can generate this string for you. Note that QGIS has to be compiled with Postgres support, otherwise this provider isn’t available:
Which is the path to the PostGIS database?
OGR library (shapefiles and many other file formats) — data source is the path to the file: PostGIS database — data source is a string with all information needed to create a connection to PostgreSQL database. QgsDataSourceURI class can generate this string for you.