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Articles (3) tagged with #geotiff

Experiments with the global JAXA ALOS World 30m elevation model on AWS S3

## TL;DR Using "this one weird GDAL creation option" `-co PREDICTOR=2` shaves 325Gb off the ALOS World global 30m elevation model. Data available in requester pays S3 bucket via GDAL virtual file system at `/vsis3/geofolio-public/jaxa_alos_world_30m/jaxa_alos_world_30m.vrt`. ## Data access I...

Hosting and accessing cloud optimized GeoTIFF files on AWS S3 - A practical guide using the EU-DEM elevation model

There are lots of great geospatial datasets available online, but accessing this data automatically and at scale is often difficult, and manual access usually takes a bit of work to download and sort it all. You'll have to register for some silly data portal, pick out the tiles that overlap your...

Guide to GeoTIFF compression and optimization with GDAL

With the fast ZSTD compression (GDAL 2.3 and above) and Limited Error Raster Compression (GDAL 2.4) becoming available in our favourite geospatial toolkit, I thought it would be interesting to run some benchmarks and write a guide on compressing and optimizing GeoTIFF files using the latest...