Taming Terrain: Sculpting Geoscapes With LiDAR

Transcript

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   Taming Terrain Sculpting geoscapes from LIDAR Andrew Godwin @andrewgodwin

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   Andrew Godwin / @andrewgodwin Hi, I’m Andrew Godwin • Python

   programmer-at-large • Geodata enthusiast • Does not (yet) own LiDAR equipment
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   Andrew Godwin / @andrewgodwin

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   Andrew Godwin / @andrewgodwin

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   Andrew Godwin / @andrewgodwin

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   Andrew Godwin / @andrewgodwin 1. Data 2. Modelling 3. Fabrication

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   Andrew Godwin / @andrewgodwin 1. Elevation Data

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   Andrew Godwin / @andrewgodwin Can be either surface or terrain

   (no buildings/plants) Digital Elevation Model
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   Andrew Godwin / @andrewgodwin Source: maps-for-free.com

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    Andrew Godwin / @andrewgodwin Hawai'i (ASTER GDEM)

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    Andrew Godwin / @andrewgodwin Radar

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    Andrew Godwin / @andrewgodwin Low resolution Needs large-ish antennas Long

    distance
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    Andrew Godwin / @andrewgodwin LiDAR

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    Andrew Godwin / @andrewgodwin Light Detection And Ranging

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin Very high resolution (cm range) Compact

    devices (planes or vehicles) Short distances
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    Andrew Godwin / @andrewgodwin Free data in both point clouds

    and DEMs! e.g. Environment Agency, USGIS
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    Andrew Godwin / @andrewgodwin data.gov.uk earthexplorer.usgs.gov

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    Andrew Godwin / @andrewgodwin 2. Processing

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    Andrew Godwin / @andrewgodwin "Point Cloud"

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    Andrew Godwin / @andrewgodwin Multiple returns Too much detail Noisy

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin a. "Thin" point cloud b. Rasterise

    point cloud to DEM c. Smooth results
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    Andrew Godwin / @andrewgodwin 3. Fabrication

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    Andrew Godwin / @andrewgodwin 3D Printing Laser Cutting Milling

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    Andrew Godwin / @andrewgodwin 3D Printing

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin 4 - 12 unattended hours (per

    15cm tile) Difficult to line up perfectly Has to print perfectly square!
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    Andrew Godwin / @andrewgodwin Milling

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin 2 - 4 attended hours per

    10cm piece Small features hard to mill CNC mills ain't cheap
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    Andrew Godwin / @andrewgodwin Laser Cutting

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin

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    Andrew Godwin / @andrewgodwin 15 minutes to cut, 15 mins

    to glue Only works for features surrounded by flat Limited detail
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    Andrew Godwin / @andrewgodwin What's next?

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    Andrew Godwin / @andrewgodwin Less human-intensive milling Better laser cut

    feature highlighting 3D directly from point clouds Somehow getting a LiDAR scanner?!
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    Andrew Godwin / @andrewgodwin code: github.com/andrewgodwin/lidartile blog: aeracode.org videos: youtube.com/user/andrewgodwin

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    Thanks. Andrew Godwin @andrewgodwin aeracode.org