Explore adding SRTM global dem mosaic to GeoServer deployment

[wmjolly]

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]

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

[alexander-petkov]

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

[alexander-petkov]

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

[wmjolly]

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/ — Reply to this email directly, view it on GitHub <#61 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA4G3DYP45YMYEVTCJMMM3TYT4WLXAVCNFSM6AAAAABAGN6H3KVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNBYGA4TQNBQHE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[alexander-petkov]

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

[alexander-petkov]

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

[alexander-petkov]

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]

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.