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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