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New blog post: Accessing Planetary Computer STAC files in DuckDB - see blog.rtwilson.com/accessing-pl

This is a report of my experimentation on how to access STAC GeoParquet files provided by Planetary Computer in DuckDB - I struggle a bit with authentication and libraries, but get it working after a while.

blog.rtwilson.comAccessing Planetary Computer STAC files in DuckDB « Robin's Blog
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@hughagraham @esa Depending on what type of SAR data you'll use, you can often (application dependent) get away with using already RTC'ed ARD data (e.g., from #PlanetaryComputer), and by using fairly simple speckle reduction filters (mostly, they are ways of cleverly blurring images). For polarimetric or interferometic data, things are more complex. Let us know how you're getting on!

USGS 3DEP LiDAR Collection @ Microsoft
--
planetarycomputer.microsoft.co <-- Microsoft data / use case portal
--
“To respond to growing needs for high-quality elevation data, the goal of 3DEP is to complete acquisition of nationwide lidar (IfSAR in AK) to provide the first-ever national baseline of consistent high-resolution topographic elevation data – both bare earth and 3D point clouds. This dataset provides the raw 3D point clouds in the Cloud Optimized Point Cloud format, and various derived products as Cloud Optimized GeoTIFFs…”
#GIS #spatial #mapping #gischat #3dep #elevation #opendata #planetarycomputer #LiDAR #ifsar #USA #nationwide #acquistion #topography #topographic #dem #bareearth #pointclouds #cloudoptimization #geotiffs #download #library #usgs #microsoft
@microsoft @usgs

day 20: outdoors
summit views

aggregating viewsheds for all peaks within the cairngorms national park. brighter areas can be seen from more hill tops.

Cac Càrn Beag (1156 m) in the south east of the park wins the most visible prize: (can be seen from 289 other summits)

peaks and cairngorms boundary from #OpenStreetMap. DEM from Copernicus Global 30 m DEM via #PlanetaryComputer. viewshed analysis run with #gdal.

code: github.com/tlohde/30DMC/tree/m