Thanks for the response Tom, but could you be a bit more specific?

What do you mean with "Same problem with qgis"? Do you mean you've also encountered a "undefined symbol: GEOSMakeValid" error related to the "postgis-3.so" library when trying to use some tool in QGIS?

I have installed PostgreSQL 12 and PostGIS 3.0.1 via Synaptic on Ubuntu 20.04 (Focal) and use CREATE EXTENSION (via pgAdmin4), when I encounter the error.

Marco

Op 13-5-2020 om 14:40 schreef Tom van Tilburg:
Same problem with qgis

On Wed, 13 May 2020, 11:14 Marco Boeringa, <[email protected] <mailto:[email protected]>> wrote:

    Hi all,

    Is there someone who can confirm they have been able to install
    PostGIS
    3.0.1 via the official APT repository?:

    https://wiki.postgresql.org/wiki/Apt

    After using the Synaptics Package Manager to install the three
    packages
    involved
    
("postgresql-12-postgis-3"/"postgresql-12-postgis-3-dbgsym"/"postgresql-12-postgis-3-scripts"),

    and subsequently trying to create the PostGIS extension in
    pgAdmin4, I
    get the following error:

    ERROR: could not load library
    "/usr/lib/postgresql/12/lib/postgis-3.so":
    /usr/lib/postgresql/12/lib/postgis-3.so: undefined symbol:
    GEOSMakeValid

    I have been trying different things to fix this for past two days
    including re-install, but to no avail. I have also attempted to
    include
    the UbuntuGIS repository as a potential alternative resource of
    PostGIS
    packages, but discovered the UbuntuGIS repository is lagging
    behind and
    doesn't yet have packages for 20.04LTS.

    Marco

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