===============
osm@spline Xapi
===============

Contact
============
http://osm.spline.de
mailing list: osm@lists.spline.de or xapi@lists.spline.de
irc: irc://irc.freenode.net/#spline

Aim
============

We like to rewrite some parts of the XApi needed for our own application. Our 
aim is not get a full implementation of the Xapi, but to answer only specific 
requests, at low latency. For this subset of Xapi we want completly cover the 
original api. 

Requests
=============

This is a list of example requests, we want to optimize.

* xapi.spline.de/api/0.6/node[amenity=*]
* xapi.spline.de/api/0.6/node[highway=busstop]
* xapi.spline.de/api/0.6/node[bbox=-6,50,2,61]
* xapi.spline.de/api/0.6/node[amenity=hospital][bbox=-6,50,2,61]

a more formal description
-------------------------

We serve the node endpoint, but no others. We implment the tag based filtering,
for only one tag and a bounding box.

Basic setup
=============

Just execute bootstrap.sh which will install node and everything you need into
your local directory. If you don't trust us read the bootstrap.sh. If you have
node and npm installed you can just use "npm link src/nodejs/" to install all 
the dependencies.

Dependencies
=============

For dependencies checkout the package.json file. One special case is the node-postgres
lib. Use a patched version: https://github.com/AlexanderS/node-postgres

If you try the libxml branch make sure you have installed libxml for developers.

Database setup
=============

We use postgres 9.* with postgis 1.5. Postgres 9.0 is used because we need some
functions on hstores and postgis 1.5 is used for fancy geometry things.

To setup a database you first need a runing postgres 9.0 instance. I hope you know
how to do this. 

Use 

	createdb osm

to create a database with name osm. Use 

	createlang plpgsql osm

to add plpgsql to your database. If you want to create a database user do so:

	createuser <username>

Add hstore support for your database:

	psql -d osm < /share/contrib/hstore.sql

Add postgis support for your database:

	psql -d osm < /share/contrib/postgis-1.5/postgis.sql

Just do:

	psql -d osm < /share/contrib/postgis-1.5/spatial_ref_sys.sql

Create the actual schema for osm data. For this step you need osmosis. If your 
osmosis build is correct there should be a directory named pacakge/scripts where
you run:

	psql -d osm < pgsql_simple_schema_0.6.sql
	psql -d osm < pgsql_simple_schema_0.6_linestring.sql
Optional/stil to test:

	psql -d osm < pgsql_simple_schema_0.6_action.sql
	psql -d osm < pgsql_simple_schema_0.6_bbox.sql 

For documentation on the schema read pgsql_simple.txt.

Import data from xml with:

	osmosis --read-xml file="planet.osm.bz2" --wp host="localhost" password="TopSecretPassword" user="insertUserNameHere" database="osm"

Before or after import you may want to create a indexes. Examples below:
	CREATE INDEX idx_nodes_tags ON nodes USING GIN(tags);	
	CREATE INDEX idx_nodes_tags ON nodes USING GIST(tags);
	CREATE INDEX idx_ways_tags ON ways USING GIN(tags);
	CREATE INDEX idx_ways_tags ON ways USING GIST(tags);