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alexander-petkov / wfas

A placeholder for the WFAS project.
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Explore adding SRTM global dem mosaic to GeoServer deployment #61

Open wmjolly opened 10 months ago

wmjolly commented 10 months ago

Jason and Natalie asked if we could add the global SRTM data to GeoServer so they can use it in WindNinja. Here is a link to the description and the data.

https://lpdaac.usgs.gov/products/srtmgl1v003/

I think we can work with the DEM tiles and a tile index in GeoServer but right now, I just want to explore what the options are to make this dataset available. It'll make lots of our other work easier too.

alexander-petkov commented 7 months ago

Remotely accessible SRTM tiles on S3, but at ~76.5 m resolution: https://elevation-tiles-prod.s3.amazonaws.com/ No overviews

alexander-petkov commented 7 months ago

SRTM downloader: https://srtm.csi.cgiar.org/srtmdata/

alexander-petkov commented 7 months ago

30 meter SRTM downloader: https://dwtkns.com/srtm30m/

wmjolly commented 7 months ago

Here is an article about hosting 30m tiles on AWS S3

https://kokoalberti.com/articles/experiments-with-the-global-jaxa-alos-world-30m-dem-on-aws-s3/

On Fri, Feb 16, 2024 at 3:13 AM alexander-petkov @.***> wrote:

30 meter SRTM downloader: https://dwtkns.com/srtm30m/

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alexander-petkov commented 7 months ago

SRTM downloader plugin for QGIS: https://github.com/hdus/SRTM-Downloader/wiki

alexander-petkov commented 6 months ago

SRTM30 configured over North America: https://wfas.firenet.gov/geoserver/nasa/wms?service=WMS&version=1.1.0&request=GetMap&layers=nasa%3Asrtm&bbox=-180.00015258789062%2C9.999860763549805%2C-51.99985885620117%2C60.00014114379883&width=768&height=330&srs=EPSG%3A4326&styles=&format=application/openlayers

image

alexander-petkov commented 6 months ago

Experiment with different methods to optimize initial loading times of SRTM mosaic, especially at full extent. Some guides: Image Pyramid: https://docs.geoserver.org/main/en/user/tutorials/imagepyramid/imagepyramid.html https://docs.geoserver.geo-solutions.it/draft/edu/en/enterprise/raster.html GDAL vrt mosaics: https://kokoalberti.com/articles/experiments-with-the-global-jaxa-alos-world-30m-dem-on-aws-s3/

alexander-petkov commented 4 months ago

OK to extend this globally? Or use a different DEM, such as ASTER?

I need a DEM with global coverage, one that the WeatherStream WPS can use as we add new datasets.

Right now the WeatherStream service assumes a separate DEM for every model. I'd like to change that.