atlaslabelingqgis
I have a shapefile of about 100 streets and another one of all the districts within a city. Some of these streets run over multiple districts. In QGIS, I use the atlas tool to successively print maps of theses streets one by one.
How can I only display the labels for the districts under each individual street street in the atlas?
I tried doing this with rule based styling. I tried using the refFunctions pluging and other spatial operators in the field calculator.
To hide the labels outside the atlas geometry boundary, you need to do the following:
Layer properties for each layer -> Labels -> Rendering -> Show Labels
Select Data Defined override -> Edit..., and write the following formula:
intersects( $geometry , @atlas_geometry )
The above formula will show the labels only within the atlas geometry.
Repeat the same formula for other layers to hide the labels outside the atlas geometry boundary.
Without using the formula:
With using the above formula:
There is different solution:
The simplest way but may be not applicable. You set the label to be only shown over a specific scale. Choose "rule-based labelling" and adjust the maximum zoom to fit your use case:
Other solution, you can transform your country layer used for label to a line and the name of the country will only be shown when you see the border of a country. Use the tool polygons to lines to do so and adjust the labelling.
The last solution using expression. I think it could be quite hard to do well and more time consuming. I will not tell you the complete formula you have to find your own because it could depend on your project.
What you should know:
Here is a base of formula:
aggregate (
'YOURLAYER' ,
'count', 1,
filter:=intersects( @map_extent , geometry(@parent))
) > 1
I don't know if you should use geometry(@parent) or $geometry.
Best Answer
Rule label and use the following formula 'Intersects ($ geometry, @atlas_geometry) = 1' to do on districts
You must have created the atlas to use @atlas_geometry