Contents
How to program a standalone application using pyqgis?
I’ve tried going through IRC to see if people can help me out with this, but the medium seems a little clumsy for making any answers clear, so I’m going to try this instead. I would like to program a standalone application using PyQGIS the way I can already program standalone applications using ArcPy. PyQGIS itself is straightforward.
Why does pyqgis not work with ArcPy or QGIS?
Certainly ArcPy doesn’t require people to mess around with the computer’s environmental settings, so I’m having difficulty understanding why PyQGIS does. It seems to me people will simply give up rather than teach themselves Windows Batch Scripting Language. Now, I notice that when I run a script in QGIS’s console editor, it works.
How does QGIS allow you to reproject data on the fly?
QGIS allows you to reproject data “on the fly”. What this means is that even if the data itself is in another CRS, QGIS can project it as if it were in a CRS of your choice. To enable “on the fly” projection, click on the CRS Status button in the Status Bar along the bottom of the QGIS window:
What’s the difference between QGIS and standalone applications?
This leads me to believe that the difference is that the QGIS application correctly sets external environment variables, but those variables are not set properly when I run it as a standalone script.
Do you need PyQt4, Tkinter, or QGIS?
You don’t need here PyQt4, Tkinter or qgis.gui: you can create an application. You need here PyQt4 (and not Tkinter) and qgis.gui. I would like to program a standalone application using PyQGIS the way I can already program standalone applications using ArcPy.
Why is my standalone script not importing QGIS?
The issue does not appear to be that I have failed to import some Python package automatically imported by the QGIS application (qgis.core and qgis.utils) – I have those import statements in my standalone script, along with all the other package imports the script requires.
What do you do with the map canvas in QGIS?
The QgsMapCanvas class also controls refreshing of the rendered map. Besides this item which acts as a background, there may be more map canvas items. Typical map canvas items are rubber bands (used for measuring, vector editing etc.) or vertex markers.
How to create a standalone application in Python?
Creating a standalone application. QGIS is a complete desktop GIS application. However, with PyQGIS, it can also be a comprehensive geospatial Python library to build standalone applications. In this recipe, we will build a simple standalone script that creates a map with a line on it.
How to make a pyqgis script with osgeo4w?
An essential first step is to ensure that all environment variables are set correctly. The most reliable approach is to go to C:\\OSGeo4W64\\bin (or wherever OSGeo4W is installed on your machine), make a copy of qgis-dev-g7.bat (or any other QGIS version that you have installed) and rename it to pycharm.bat:
Why is init pyqgis not updated in cookbook?
It seems things changed to init PyQGIS but were not updated in the cookbook. There is a discussion about the issue. Look at the bottom of the discussion mainly. Be careful, it’s only a hint. It may be related to your Windows path too (working on Linux mainly).
Can you use ArcPy outside of QGIS on Windows?
Because you use the Python version of ArcGIS, in other cases, the same is true, look using arcpy outside arcmap or Configure PyScripter to use with QGIS (and still use arcpy) on Windows, for example. You don’t need here PyQt4, Tkinter or qgis.gui: you can create an application. You need here PyQt4 (and not Tkinter) and qgis.gui.