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Results tagged with qgis
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user 40616
QGIS is a cross-platform GIS application licensed under the GNU General Public License.
3
votes
2
answers
926
views
Do QGIS layer definition files (qlr) support joined layers?
I tried to save a qlr file for a shp layer joined to an xls file, but when I load it, the join definition isn't there anymore...
Join definition is present in the qlr file, so I assume it should work …
- 879
4
votes
Accepted
How to convert QGIS 2.x composer templates to QGIS 3.x layouts templates?
I found the answer here :
http://osgeo-org.1560.x6.nabble.com/QGIS-Developer-QGIS-3-layout-conversion-from-old-template-format-td5352994.html
1- Create composers from templates (.qpt) in QGIS 2.x
2- … Save the project
3- Open the project in QGIS > 2.99
4- Save each layout (composer) as a layout template (.qpt)
This process is ok for a limited number of templates. …
- 879
3
votes
1
answer
946
views
How to convert QGIS 2.x composer templates to QGIS 3.x layouts templates?
I have a bunch of QGIS 2.x composer templates (.qpt) which I would like to use in QGIS 3.x. … I tried to create a layout from template, to add items from template and to copy/paste from QGIS 2.x composer to QGIS 3.x layout, but none succeed. …
- 879
0
votes
How to get a composer label by ID with Python in QGIS?
Here is the workaround I found with the help of QGIS Developer list :
@staticmethod
def getCompositionItem(composition, itemId, itemClass):
item = None
for item in composition.items(): …
- 879
2
votes
Accepted
How to get a composer label by ID with Python in QGIS?
Another workaround suggested by Nyall Dawson (cast) :
from qgis.core import QgsProject, QgsLayoutItemPicture
import sip
myLayout = QgsProject.instance().layoutManager().layoutByName('test')
myLayoutP …
- 879
2
votes
How to write a custom function for a label?
You can try :
cap = capt if capt is not None else ''
instead of :
cap=coalesce(capt,'')
and :
cap2 = (dist1 + ' ' + unit1 + ' ' + label1 + ' ' + dist2 + ' ' + unit2 + ' ' + label2).strip()
in …
- 879
1
vote
1
answer
74
views
Why does setSubSymbol causes QGIS to crash?
I am having problems creating a multilayer line symbol with this code :
symbol = QgsLineSymbolV2.createSimple({})
symbol.deleteSymbolLayer(0)
symbolLine = QgsSimpleLineSymbolLayerV2()
symbol.appendS …
- 879
1
vote
Accepted
How to modify spatialite table column names with QGIS?
3.4.1
Note : DropGeoTable should be replaced by DropTable when SpatiaLite lib will be updated in QGIS. … For more detailed information :
QGIS issue
SpatiaLite ticket …
- 879
1
vote
How to make Portable QGIS 3
This batch seems to work, adding a /qgisconfig directory in the current one to store QGIS config :
set DRV_LTR=%~dp0
REM set a specific Qgis variable with a variable setting before
set OSGEO4W_ROOT=% … Else open a Qgis program with a new empty project
if "%1" == "" (start "QGIS" /B %OSGEO4W_ROOT%\bin\qgis.bat --profiles-path %DRV_LTR%qgisconfig) else (start "QGIS" /B %OSGEO4W_ROOT%\bin\qgis-ltr.bat - …
- 879
2
votes
1
answer
529
views
How to specify data defined rounded background corners for labels in QGIS 3?
In QGIS 2 I could specify data defined rounded corners for labels background, using a string, for example '5, 5' :
In QGIS 3, this same syntax is correctly recognised by the expression generator, but …
- 879
1
vote
3
answers
2k
views
How to modify spatialite table column names with QGIS?
However, when I load the resulting table in QGIS and open the attribute table, I get old column names and datas replaced by column names.
Table before :
Table after : …
- 879
3
votes
1
answer
177
views
Display label with both direction symbols
I have a line layer describing a road network, with traffic attribute values for both driving directions.
I would like to display label for both traffic values with direction symbols (above label is t …
- 879
6
votes
1
answer
751
views
Angle orientation for data defined label rotation in QGIS?
It seems that angle orientation for data defined label rotation is different in QGIS 2 (anti-clockwise) and QGIS 3 (clockwise). …
- 879
1
vote
Accepted
How to add feature to auxiliary layer and commit changes to auxilliary field in QGIS 3.x?
It turns out that it didn't work because myLayer was a virtual layer, referencing a WFS source. Changing it to a straight WFS layer made it work like a charm, with second version of code (EDIT 2)...
- 879
2
votes
1
answer
158
views
How to add feature to auxiliary layer and commit changes to auxilliary field in QGIS 3.x?
I can't figure how to do that, here is my code :
auxKeyField = myLayer.fields().field(myLayer.fields().indexOf('id'))
auxStorage = QgsProject.instance().auxiliaryStorage()
myAuxLayer = auxStorage.crea …
- 879