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Jerkmate
https://proj.org/en/stable/zreferences.html
References — PROJ 9.8.1 documentation
proj 9 81 documentationreferences
https://proj.org/en/stable/usage/ellipsoids.html
Ellipsoids — PROJ 9.8.1 documentation
proj 9 81 documentation
https://proj.org/en/stable/download.html
Download — PROJ 9.8.1 documentation
proj 9 81 documentationdownload
https://www.osgeo.org/foundation-news/proj-9-8-1-is-released/
PROJ 9.8.1 is released - OSGeo
Warning It was discovered after the PROJ 9.8.0 release that several EPSG updates introduced after EPSG v12.033 – notably the introduction of national...
proj 9 81releasedosgeo
https://proj.org/en/stable/
PROJ — PROJ 9.8.1 documentation
9 8 1projdocumentation