Terrain, Art, Python and LiDAR

Transcript

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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"<ffffffffffffH", normal[0], normal[1], normal[2],

    x1, y1, z1, x2, y2, z2, x3, y3, z3, 0, )
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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