[HN Gopher] Shaded Relief Maps in Blender
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Shaded Relief Maps in Blender
Author : mooreds
Score : 117 points
Date : 2021-10-04 16:19 UTC (6 hours ago)
(HTM) web link (github.com)
(TXT) w3m dump (github.com)
| a_large_rat00 wrote:
| Why would you want to do this rather than using the built-in
| hillshader and 3D map view?
|
| https://opengislab.com/blog/2018/3/20/3d-dem-visualization-i...
| xemoka wrote:
| My guess is that Blender's 3D rendering and lighting is far
| better than most GIS packages, including QGIS.
| jblindsay wrote:
| These blender-based shaded relief images have been popping up a
| fair bit in the geomatics space recently. I really love them, but
| they are fairly complicated to make. I developed the open-source
| geospatial platform WhiteboxTools (developed in pure Rust) to
| help with tasks like this. You can create multi-scale hillshade
| images with it and the type of shadow model displayed above as
| well with one click:
|
| https://www.whiteboxgeo.com/manual/wbt_book/available_tools/...
|
| Better yet, you can create a dynamic shadow model based on a DEM
| using the ShadowAnimation tool:
|
| https://www.whiteboxgeo.com/Guelph_Shadow_Animation/shadow_a...
|
| multidirection hillshade:
| https://www.whiteboxgeo.com/manual/wbt_book/available_tools/...
|
| TimeInDaylight tool:
| https://www.whiteboxgeo.com/manual/wbt_book/available_tools/...
| jblindsay wrote:
| Here are some more examples of the dynamic shadow models, that
| you may enjoy:
|
| https://whiteboxgeo.com/Shadow_Animation/small_farm_shadows_...
|
| https://www.whiteboxgeo.com/Shadow_Animation/Kitchener_shado...
| xemoka wrote:
| Thank you John for your work with WhiteBoxTools, I was
| introduced to it when a former student of yours entered our GIS
| program at Selkirk College a couple years back and have been
| keeping one eye on it since.
|
| You've got some really excellent algorithms and tools in WBT,
| I've used them to shortcut some obnoxiously long
| lidar/pointcloud processing with other packages.
|
| I'm not sure that this is "less complicated" than the linked
| tutorial though, but some great exploration for someone who
| knows a little more ;)
| jblindsay wrote:
| @xemoka Thanks for the kind words. I will respectfully
| disagree about the level of complication involved though. In
| this case, you simply open the ShadowImage tool, specify your
| input DEM, choose a palette, name the output and press run. I
| realize that there is a lot of GIS knowledge that is required
| in many cases, but this one is fairly straight forward to
| run.
| MilStdJunkie wrote:
| Easier geodata workflow is to use the addon BlenderGIS
|
| https://github.com/domlysz/BlenderGIS
|
| Advantage of DEMs is you can make fictional stuff as well.
| dymk wrote:
| This is really neat. I dabble in woodworking, and the workflow
| for making these maps is pretty similar to what I do to create
| the 3D models for CNC caved wooden relief maps:
| https://imgur.com/a/ZihtlwN
| tylermw wrote:
| For doing this type of work programmatically in R, check out the
| rayshader package:
|
| https://www.rayshader.com
|
| It has a high-quality pathtracing renderer built-in
| (https://www.rayrender.net) that only requires a single line of R
| code to produce results similar to what's offered here (without
| all the manual work).
| DIVx0 wrote:
| This is apropos. I am buying some land and wanted to model it to
| help visualize building site options. There are publicly
| available topomaps and some DEMs but there was also LIDAR data
| sets too.
|
| I spent hours learning how to render lidar point clouds into maps
| using QGIS and some other tools. Very steep learning curve but it
| was fun to do. Now to apply what I learned with this to make some
| neat shaded maps too!
| winkeltripel wrote:
| I use https://terrain.party to source heightmaps as image files,
| and perform any manipulation of the heightmap in normal image-
| editing software. It's a lot less funky if you already have the
| image-editing skill.
| ashtonkem wrote:
| Now to just send it off to a high quality printshop for framing.
| dfgasdgsd wrote:
| looked into doing this last year for a bit - there are a few
| people selling these maps that are pretty cool:
|
| https://scottreinhardmaps.com/ (from what I can tell he was the
| first one to do this?)
| https://twitter.com/geo_spatialist?ref_src=twsrc%5Egoogle%7C...
|
| https://eastofnowhere.co/collections/best-sellers/products/t...
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