steps-to-install-postgis-and-import-osm

- sudo apt-get install postgresql postgresql-contrib

- Install postgis using instructions at: 
  http://postgis.net/docs/postgis_installation.html
Notes: 
1) Depending on your version, 'postgis_tiger_geocoder' might not get installed.  
To rectify this, use the following commands:

psql -d <dbname> -c "CREATE EXTENSION hstore";
psql -d <dbname> -c "CREATE EXTENSION fuzzystrmatch";
psql -d <dbname> -c "CREATE EXTENSION postgis_tiger_geocoder";

2) Add the following environment variables to enable raster files:
export POSTGIS_ENABLE_OUTDB_RASTERS=1
export POSTGIS_GDAL_ENABLED_DRIVERS=ENABLE_ALL
export POSTGIS_GDAL_ENABLED_DRIVERS="GTiff PNG JPEG GIF XYZ"

Not setting these, will cause them to be turned off.


- Run 'make check' to ensure that postgis has been installed correctly

- create a database called 'osm'

- Install osm2pgsql using instructions at:
http://wiki.openstreetmap.org/wiki/Osm2pgsql
On debian wheezy, this involves:

sudo apt-get install build-essential libxml2-dev libgeos++-dev libpq-dev 
libbz2-dev libproj-dev libtool automake git

sudo apt-get install libprotobuf-c0-dev protobuf-c-compiler

sudo apt-get install osm2pgsql


- Insert <city>.osm into the database that you created, using the command:
osm2pgsql --create --database osm --latlong --hstore-all --slim 
/path/to/maps/<city>.osm

- Check if the data has been inserted correctly:

>psql osm
osm=# \d planet_osm_line;

This should return a description of the table

osm=# select count(*) from planet_osm_line where ((tags->'highway') = 
'secondary');

This should return a count of roads that are major roads, depending on the city 
map that you loaded