https://mpetroff.net mpetroff.net Sun, 26 Jun 2016 22:24:36 +0000 en-US hourly 1 https://mpetroff.net/2016/06/light-pollution-map/ https://mpetroff.net/2016/06/light-pollution-map/#comments Sun, 26 Jun 2016 22:24:36 +0000 https://mpetroff.net/?p=2177 Continue reading →]]> A few weeks ago, The New World Atlas of Artificial Night Sky Brightness was published in Science Advances. The article is a report on artificial sky radiance, a current update to previous data. The supplement to the article is a light pollution map. Since I didn’t like the quality of the CIRES web visualization of the data, I decided to create a vectorized version. As the GeoTIFF source map isn’t publically available, I used the provided KMZ preview as a starting point. After extracting and assembling the JPEG tiles, I used a bilateral filter and other processing to remove the compression artifacts and convert the image into a usable state. I then used GDAL to apply coordinate information to the image and used makesurface and tippecanoe to create vector tiles of the map. Finally, I visualized the data using the Mapbox Dark style.

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