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Terrain, Andrew Godwin @andrewgodwin Art, Python & LiDAR

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Hi, I’m Andrew Godwin • Django contributor (Migrations/Channels) • Principle Engineer at • I always need more lasers

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1. Laser-cut profiles

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DEM: Digital Elevation Model

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10 9 5 3 2 9 7 4 3 2 8 7 3 2 4 6 8 5 3 5 4 9 7 4 6 3 8 8 6 5 2 5 4 3 3 10 9 5 3 2 9 7 4 3 2 8 7 3 2 4 6 8 5 3 5 4 9 7 4 6 3 8 8 6 5 2 5 4 3 3

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Loads the DEM as a CSV Picks one in N rows Draws a contour using svgwrite

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2. 3D-printed cities

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(1, 3, 4) (6, 5, 11) (3, 7, -2)

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POINT CLOUD → DIGITAL ELEVATION MAP (DEM) python-pcl lastools

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Top surface Fully sealed 3D model (with the tile base)

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Loads the DEM Clips height (top and bottom) Smooths rough features Writes out an STL file

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(1, 3, 4) (6, 5, 11) (3, 7, -2)

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How do you write STL? struct.pack( b"

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Should I have used NumPy? Yes. Did I use NumPy? Err, no.

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github.com/andrewgodwin/lidartile

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3. CNC-milled National Parks

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Take the US National DEM Get the outline of the National Park Use QGIS to cut out a park-only DEM https://viewer.nationalmap.gov https://catalog.data.gov/dataset/national-park-boundariesf0a4c Toolbox > GDAL > Clip By Extent

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Irregular shapes!

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MAP PROJECTIONS

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Things I Won't Work With Unicode Names Timezones Currencies Networks Addresses Dioxygen Difluoride

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Things I Won't Work With Unicode Names Timezones Currencies Networks Addresses Dioxygen Difluoride Map Projections

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4. The Future

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More US National Parks I do each one as I visit it. There are… 59.

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Easier Milling 8 hours per piece. Really.

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Better STL optimisation Millions of polygons isn't great.

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Personal LiDAR Thanks, autonomous vehicles!

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github.com/andrewgodwin/lidartile github.com/andrewgodwin/gis_tools

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Thanks. Andrew Godwin @andrewgodwin aeracode.org