r/QGIS • u/Key-Pea-5909 • 4d ago

Make 3D map from point data?

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I have all of this overlapping data, which doesn't look good, and isn't very useful. I was wondering if it's possible to make this point data 3D? So, for example, the location where there are 42 data points would be 42 "units" tall, the 11 would be 11 tall, etc. If this is possible, does anyone know where I could find a tutorial on how to do it? I know there are other ways to map the data points than what I show here, but I thought the 3D would look cool. Thanks!

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15

u/katergold 4d ago

I can recommend reading a book about cartography and data visualization Thematic Mapping by Kenneth Fields.

What you mention could maybe be down with some sort of extrusion based on your values. Not sure if you could actually show 42 individual blocks

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u/Key-Pea-5909 4d ago

Thanks for the recommendation. I’ll check it out

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u/Armando_F 4d ago

The first avenue, before considering extrusion/3D, is to draw your symbols in order of size.. large ones first, then transparency and border style.

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u/ikarusproject 4d ago

Are the circles aggregates of more smaller circles or are they simply scaled?

In the first case you can create a heat map via the style option or by doing Kernel Density estimation.

In the second case you can make the circles transparent and only have the outer edge show. That way you get to Conway the scale but still have the map visible.

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u/Key-Pea-5909 4d ago

The circles are point clusters, and the size is based on the number of points in the cluster. Thank you for the suggestions. I tried making them more transparent, but that doesn't make it look any more readable. And yes, I can do something like a heat map. I just thought doing it in 3D would look good.

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u/ikarusproject 3d ago edited 3d ago

You can use the kernel density heat map raster to create a 3d surface.

edit: If the circles where polygons themselves you could use the 2.5D styling option to achieve your desired effect of vertical bars. But I dont know how to cluster the points.

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u/Key-Pea-5909 3d ago

Thanks. I’ll look into this. Do you know of any tutorial that would help? I’ve never done anything with 3D before.

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u/ScientistRelative718 15h ago

Ich mache 3D Modelle ueberwiegend in plotly oder rayshader. Gib mal bei Google einfach Forest 3D map ein, da gibt es Anleitungen zu. Ich weiß allerdings nicht, wie deine Programmierkenntnisse sind oder wie es in GIS geht.