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# elevation2scad
Generate OpenSCAD source code from elevation data. I don't provide code for getting elevation data because providers might have their own license. You need to write your own for getting that.
Save your elevation data into `elevations.dat` with the format `longitude latitude elevation` and order by `[longitude, latitude].`
After `elevations.dat` is ready, run `python genscad.py`. Use [OpenSCAD](https://www.openscad.org/) to open the generated `evelation.scad` which requires my library [dotSCAD](https://github.com/JustinSDK/dotSCAD).
You can use the `gen_surface_from` function to generate data for [`surface`](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Other_Language_Features#Surface). Just uncomment the line in `genscad.py`.
if __name__ == "__main__":
ymin, yinc, thickness, scale = 21.750, 0.015, -1, 100
# generate elevation.scad
# gen_scad_from('elevations.dat', ymin, yinc, thickness, scale = scale)
# generate surface.dat
gen_surface_from('elevations.dat', ymin, yinc)
After generating `surface.dat`, write `surface.scad` containing the following.
surface(file = "surface.dat", center = true, convexity = 5);
The model shown below is [Taiwan](https://www.google.com.tw/maps/place/%E5%8F%B0%E7%81%A3/@23.6558232,120.3439706,8.04z/data=!4m5!3m4!1s0x346ef3065c07572f:0xe711f004bf9c5469!8m2!3d23.69781!4d120.960515), generated from data that latitude from 21.75 to 25.500 and longitude from 119.900 to 122.100.
You can use `-math.inf` to reserve original elevation below sea level.
