I was looking at the size of the packages I had installed and noticed libgweather took 80Mb. libgweather apparently "Provides access to weather information from the net", not something you expect to take 80Mb.
I found most of the space was taken up by xml files.
$ ls -sh /usr/share/libgweather/
total 76M
916K Locations.ang.xml 964K Locations.et.xml 976K Locations.lt.xml 1000K Locations.ru.xml
960K Locations.ar.xml 948K Locations.eu.xml 952K Locations.lv.xml 916K Locations.rw.xml
1.1M Locations.as.xml 952K Locations.fa.xml 1.1M Locations.mai.xml 1.0M Locations.si.xml
932K Locations.az.xml 972K Locations.fi.xml 948K Locations.mg.xml 916K Locations.sk.xml
948K Locations.be.xml 976K Locations.fr.xml 968K Locations.mk.xml 976K Locations.sl.xml
1000K Locations.be@latin.xml 920K Locations.ga.xml 1.1M Locations.ml.xml 964K Locations.sq.xml
1004K Locations.bg.xml 976K Locations.gl.xml 932K Locations.mn.xml 972K Locations.sr.xml
984K Locations.bn.xml 1.1M Locations.gu.xml 1.1M Locations.mr.xml 968K Locations.sr@latin.xml
1.1M Locations.bn_IN.xml 976K Locations.he.xml 916K Locations.ms.xml 972K Locations.sv.xml
936K Locations.bs.xml 1.1M Locations.hi.xml 972K Locations.nb.xml 1.1M Locations.ta.xml
972K Locations.ca.xml 948K Locations.hr.xml 996K Locations.ne.xml 1.1M Locations.te.xml
976K Locations.cs.xml 976K Locations.hu.xml 972K Locations.nl.xml 996K Locations.th.xml
948K Locations.cy.xml 948K Locations.id.xml 948K Locations.nn.xml 972K Locations.tr.xml
972K Locations.da.xml 972K Locations.it.xml 916K Locations.oc.xml 976K Locations.uk.xml
972K Locations.de.xml 996K Locations.ja.xml 1.1M Locations.or.xml 976K Locations.vi.xml
1012K Locations.dz.xml 956K Locations.ka.xml 1008K Locations.pa.xml 916K Locations.xml
980K Locations.el.xml 1.1M Locations.kn.xml 972K Locations.pl.xml 960K Locations.zh_CN.xml
952K Locations.en_CA.xml 976K Locations.ko.xml 976K Locations.pt.xml 976K Locations.zh_HK.xml
988K Locations.en_GB.xml 936K Locations.ku.xml 988K Locations.pt_BR.xml 976K Locations.zh_TW.xml
972K Locations.es.xml 956K Locations.ky.xml 972K Locations.ro.xml 4.0K locations.dtd
Lets take a look a couple of these xml files.
The start of Locations.en_GB.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE gweather SYSTEM "locations.dtd">
<gweather format="1.0">
<region>
<name xml:lang="en_GB">Africa</name>
<country>
<name xml:lang="en_GB">Algeria</name>
<iso-code>DZ</iso-code>
<fips-code>AG</fips-code>
<timezones>
<timezone id="Africa/Algiers"/>
</timezones>
<tz-hint>Africa/Algiers</tz-hint>
<city>
<name xml:lang="en_GB">Adrar</name>
<coordinates>27.900000 -0.283333</coordinates>
<location>
<name>Adrar</name>
<code>DAUA</code>
<coordinates>27.883333 -0.283333</coordinates>
</location>
</city>
The start of Locations.fr.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE gweather SYSTEM "locations.dtd">
<gweather format="1.0">
<region>
<name xml:lang="fr">Afrique</name>
<country>
<name xml:lang="fr">Algérie</name>
<iso-code>DZ</iso-code>
<fips-code>AG</fips-code>
<timezones>
<timezone id="Africa/Algiers"/>
</timezones>
<tz-hint>Africa/Algiers</tz-hint>
<city>
<name xml:lang="fr">Adrar</name>
<coordinates>27.900000 -0.283333</coordinates>
<location>
<name>Adrar</name>
<code>DAUA</code>
<coordinates>27.883333 -0.283333</coordinates>
</location>
</city>
Looks like every file contains the exact same data just with localised place names.