Blender Gis and 3D-Modelling

Hello,

i try to use Blender as a planning tool for a park.
Creating a height map with Blender GIS was no problem.
Now i want to project my 2D Shaped of the different areas like paths on this surface.
My workflow was doing this with booleans. First i draw 2D Shaped and then i made differences and intersections.
The solution was good, but this workflow has to problems:
first changing something is nearly impossible, second it happens that blender is creating very much and sometimes very ugly vertices networks.

My question is:
Has someone a better workflow idea for this usecase?

Best regards

Would the ShrinkWrap modifier or GeoNodes using RayCast be solution for this?

With Shrinkwrap i didn´t get a working solution that is “loseless” - it changes the form of the mesh. Is it possible to create it with a curve instead of changing the curve into a mesh?

I am not sure how to subdivide the shapes but i think this solution will not work better than boolean in the quality of the shape

If terrain information is available, you can use the Displace modifier.

You’ll have to make more precise modeling yourself.

Geometry nodes are effective if there are many changes and control of multiple objects is required.
However, you may need to configure complex nodes.

Raycasting looks very intresting.
The setup looks complicated, maybe this is the solution.
I will try it.

Have you tried setting the shrink wrap modifiers
“Wrap Mode” to “Project”
“Axis” to “Z” (and perhaps to) “negative”?

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A Geonodes setup like the following might be more flexible:

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Hello Lumpengnom,

how did you make this node ( red marked in the screenshot? Or can you maybe attach the file?
I tried to rebuild it but didn´t get this two nodes and i am not sure who get this geometry nodes modifier.
Thanks for your help!

I have since closed the file and did not save it, so I can not upload it.

But these nodes are just the index and the position node minimized with the little triangle thingy in the corner.
You can find them in the “add” menu under
Geometry → Read → position
Geometry → Read → index

But it is faster to use
“shift + a” and then just start typing “pos” or “ind”

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