Flow map arrows in QGIS | Anita Graser
►https://anitagraser.com/2016/12/30/new-style-flow-map-arrows
Où Anita Graser explique comment dessiner (tracer et paramétrer le design) des flèches symbolisant des flux avec QGIS ; une référence.
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Details of good flow maps
- number of flow overlaps should be minimized;
– sharp bends and excessively asymmetric flows should be avoided;
– acute intersection angles should be avoided;
– flows must not pass under unconnected nodes;
– flows should be radially arranged around nodes;
– quantity is best represented by scaled flow width;
– flow direction is best indicated with arrowheads;
– arrowheads should be scaled with flow width, but arrowheads for thin flows - should be enlarged; and
– overlaps between arrowheads and flows should be avoided.▻https://anitagraser.com/2016/12/18/details-of-good-flow-maps
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Application des recommandations sur un cas pratique :
Last time, I wrote about the little details that make a good flow map. The data in that post was made up and simpler than your typical flow map. That’s why I wanted to redo it with real-world data.
►https://anitagraser.com/2016/12/30/new-style-flow-map-arrows
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La suite :
Today’s post was motivated by a question following up on my recent post “Details of good flow maps“: How to create arrows with gradients from transparent to opaque?
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