Sources & Methods — 31 Days of WA Data

Data sources and methodologies for each day of the project.

Wadjemup Rottnest Bathymetry

Source

Perth Bathymetric LiDAR from the Department of Transport WA (December 2009, 10m grid). CC BY 4.0.

Processing

Individual survey grids combined as a virtual raster in QGIS, exported as a 25% Float32 DEFLATE COG (from 568 MB to 14 MB).

Tech Stack

HTML/CSS/JS webmap. I wanted a chance to upgrade from my Leaflet map experience, so this uses the modern and open MapLibre GL for basemap rendering. deck.gl: colours and hillshades the bathymetry on the client side. GeoTIFF.js reads the COG to show depth on click.

Author

Patrick Morrison

More sources will appear here as each day is published.