If you want to make points (or other geometry types) a different size in QGIS, based on one of the columns in your dataset then you can do it really easily.
You just need to click on the *Data defined override* button in QGIS - you'll see these buttons everywhere in the Layer Properties for layers in QGIS. Once you get how it works you can do all sorts of cool and interesting things.
*Leeds data used in the video* [ Ссылка ]
*The point data used in the video*
[ Ссылка ]
See my intro and intermediate QGIS courses for more: [ Ссылка ]
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