Timestamps:
0:00 Intro
0:45 [QGIS] Merging
2:02 [QGIS] Cropping
4:11 [QGIS] Remapping with Raster calculator
06:39 [QGIS] Converting bit depth with Translate
08:15 [Rhino] Heightfield
12:06 [Rhino] Explicit mesh generation
13:27 [Rhino] Solidifying the surface
This tutorial demonstrates how to use a heightmap downloaded from SLU GET (Geodata Extraction Tool) as a heightfield model in Rhino, by using QGIS to convert it from a 32-bit heightmap to a 16-bit one with minimal stepping artefacts.
Expression for use with QGIS' raster calculator tool:
( "InputLayer@1" - X ) / ( Y - X ) * 65535
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"InputLayer@1" : the cropped heightmap layer
X = STATISTICS_MINIMUM of the same layer
Y = STATISTICS_MAXIMUM of the same layer
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Links:
https://zeus.slu.se/get/
As of VT23, QGIS is installed in the following computer labs: ARCPLAN, CADLAB, CHRISTOPHER, M102, M122, NILS, PIPPIN, XQ23, XQ25, and XQ32. Rhino 7 is installed in the following: ARCPLAN, BUTTER, CADLAB, GLADER, KLOKER, PROSIT, TOKER, TROTTER, XW343, XW344, XW41, and XW50. (Check
https://www.kth.se/en/student/it/campus/computer-rooms/lista for current status.)
Disclaimer:
This tutorial aims to increase student awareness of the versatility of the digital tools available for use within the context of the architectural education offered by KTH. As such, it might not be generally applicable, but on the other hand, if even one student is helped by it with fulfilling deliverables requirements, the purpose of this tutorial is satisfactorily achieved. There might be inaccuracies in this tutorial video – if you identify any significant one, please tell us in the comments.