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Is it possible to install postgresql-9.5-postgis-2.3 (Postgres 9.5, Postgis 2.3) on Ubuntu 16.04 Server without installing x11-common?

After I installed Postgresql 9.5, I attempted to install postgresql-9.5-postgis-2.3. This stated that I needed to install a large stack of dependencies including: x11, libgl, libpulse, libqt and others.

This is pretty crazy in my opinion as a simple sudo apt-get install postgresql-9.5-postgis-2.3 results in an additional 590 MB install.

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    can you tell us why you need exactly this combination?
    – pLumo
    Jul 24 '18 at 11:27
  • I agree with RoVo I can't find anything to even substantiate this problem, and I'm looking at the packages themselves. Nov 26 '18 at 23:16
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If the package developer says his/her package depends on "x11, libgl, libpulse, libqt and others", believe him/her.

How would one use postgis without X11?

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    Why should one 'just believe' a package author if a database extension tries to install a whole windowing system? There is no obvious reason why those dependencies are needed. It even tries to install mysql-common. What?!?! Installing a Postgres extension installs mysql? This at least needs some clarification.
    – Xatoo
    Jul 24 '18 at 11:21
  • use apt-get source postgresql-9.5-postgis-2.3 and you can figure out yourself.
    – waltinator
    Jul 24 '18 at 22:02
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+100

PostGIS is a PostgreSQL spatial extension that provides new geometry types and spatial functions on these types. Functionally, I can't see why it would require libqt, or other GUI libraries, except for auxiliary programs perhaps. (Are you sure these dependencies are not from other things like qgis?)

I don't have 16.04 now, but installing on a fresh 18.04 does not seem to require libqt, and the following did not report anything:

sudo apt-get install postgresql-10-postgis-2.4 -s | grep libqt

Anyways, if you need PostGIS with minimum dependency on a Ubuntu server, you can build from source. It is not very difficult to install/build GEOS and several dependent libraries and then PostGIS itself. See e.g. the instructions here.

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