Questions tagged [aggregate]
The aggregate tag has no usage guidance.
6
questions
1
vote
1answer
35 views
Making a spatial link to points within polygons in the field calculator in QGIS
I have a polygon shapefile of the counties in the UK and a separate point shapefile of project sites.
Within the project sites attribute table I would like to add a new virtual column with the name ...
3
votes
1answer
75 views
Calculating the sum of a column based on another column in another table in the field calculator of QGIS
I have a records table with site numbers and abundances of different species at that site (e.g. site 1 has 6 common bats and 13 pipistrellus bats).
I would like to sum total number (i.e. 6+13=19) at ...
2
votes
1answer
59 views
Aggregates Functions - QGIS - Calculating Area Explained
I've been reading through question and answers on the Aggregates Function, but have been unable to obtain a clear understanding and solution to my problem. I have a polygon grid ("Grid 4km") and I ...
0
votes
0answers
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Aggregate&Clip OR Clip&Aggregate?
I have a raster data with resolution of 0.00833333 deg and want to aggregate it to 0.25 deg resolution. I used two approach:
I first clipped my raster with my study area (polygon feature) and then ...
3
votes
1answer
140 views
Layout expression for getting all features of layer within the current map view in QGIS 3?
In a map layout template, I want to insert an expression which gets all feature's names of a certain layer, which are contained in the current layout's view/extent. Is there a way to get an aggregate ...
1
vote
1answer
1k views
Using Aggregate and Infowindow in CartoDB
I'd like to use CartoDb to map historic addresses of a city (link to demo). Individual addresses are mapped as points on the map. Detailed information for each address point should be displayed in ...
