User:Zverik/Tile Server on Fedora 20

See this page for most recent instructions for Ubuntu 14.04, by Paul Norman.

Initialize database

yum install postgresql postgresql-contrib postgresql-server postgis

Default DB location

If your /usr partition is low on space, follow the next chapter instructions. Otherwise run this command and skip to "Start PostgreSQL...":

su postgres -c "initdb -E UTF8"

Moving DB to home

We'll be moving PostgreSQL data directory to /home/pgdata, as described here.

mkdir /home/pgdata
chown postgres:postgres /home/pgdata
su postgres -c "initdb -E UTF8 -D /home/pgdata"

# change PGDATA in systemd config
sed "s#^Environment=PGDATA=.*#Environment=PGDATA=/home/pgdata#" /usr/lib/systemd/system/postgresql.service > /etc/systemd/system/postgresql.service

# change PGHOME selinux context
chcon -R --reference=/var/lib/pgsql/data /home/pgdata

# allow postgres to search /home
cd /root
mkdir selinux.local
cd selinux.local
chcon -R -t usr_t .
ln -s /usr/share/selinux/devel/Makefile .
touch postgresqlhome.fc
touch postgresqlhome.if

cat > postgresqlhome.te <<EOF
module postgresqlhome 0.1;

require {
        class dir search; 
        class lnk_file read;

        type home_root_t;
        type postgresql_t;
        type var_lib_t;
};

# Allow postgresql to search directory /home
allow postgresql_t home_root_t:dir search; 
EOF

make
semodule -i postgresqlhome.pp

Start PostgreSQL and create database

systemctl enable postgresql
systemctl start postgresql
su postgres -c "createdb gis"
psql -d gis -c "create extension postgis;"

Populate the database

It is recommended to set overcommit kernel flag, so osm2pgsql multiprocessing works (not tested on Fedora yet):

echo "vm.overcommit_memory=1" > /etc/sysctl.d/60-overcommit.conf
sysctl -p /etc/sysctl.d/60-overcommit.conf

Now download some data, cut it if needed (see below) and load to a database:

yum install osm2pgsql

# Download data
# wget http://be.gis-lab.info/data/osm_dump/dump/latest/local.osm.pbf

osm2pgsql -d gis --slim -C 8000 --number-processes 3 local.osm.pbf

Cutting a region

If you need to cut source file, install Osmosis:

mkdir osmosis
cd osmosis
wget -O - http://bretth.dev.openstreetmap.org/osmosis-build/osmosis-latest.tgz | tar -xz
ln -r -s bin/osmosis /usr/bin/
cd ..

# Cut local.osm.pbf with a polygon region.poly
osmosis --read-pbf local.osm.pbf --bounding-polygon file=region.poly --write-pbf local-cut.osm.pbf

# ...or with a bounding box
osmosis --read-pbf local.osm.pbf --bounding-box top=46.6 bottom=44 left=32 right=37 --write-pbf local-cut.osm.pbf

Prepare mapnik style

yum install mapnik mapnik-utils carto gdal unifont-fonts
git clone https://github.com/gravitystorm/openstreetmap-carto.git carto
cd carto
./get-shapefiles.sh
carto project.mml | grep -v 'Arundina\|Khmer\|Padauk' | sed 's/unifont/Unifont/' >osm.xml

Rendering tiles from command line

yum install python-shapely
git clone https://github.com/Zverik/polytiles.git
polytiles/polytiles.py -p region.poly -z 6 8

For rendering images, see Nik4.

Side note - installing TileMill

You would probably want it to edit mapnik style. Current instructions are too verbose: everything is packaged in Fedora except tilemill itself.

yum install nodejs-mapnik protobuf-devel protobuf-lite
git clone https://github.com/mapbox/tilemill
cd tilemill
grep -v topcube package.json > ptmp; mv ptmp package.json
npm install
./index.js

Now open localhost:20009 in any browser.