[reminder] PostGIS v3.2: possible change in ST_AsMVTGeom()

[tobwen]

What?

Starting with PostGIS v3.2, ST_AsMVTGeom() preserves more of the original geometry's details at a scale close to the target extent. If you need previous simplifying behavior, you need to simplify the geometry in advance.

But this is still in discussion as of writing (2021-10-01), since there might be performance problems.

References

https://git.osgeo.org/gitea/postgis/postgis/raw/tag/3.2.0alpha1/NEWS
https://trac.osgeo.org/postgis/ticket/4149
postgis/postgis#463

[pka]

Support for using ST_AsMVTGeom is a long-term plan, but it requires a fundamental change in the t-rex architecture. Currently t-rex requests raw geometries from providers and converts them to MVTs in a separate step.