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geocoder-us for Debian ---------------------- The Geocoder::US package is a Ruby library that uses a database built from the US Census Bureau's TIGER/Line data to interpolate a latitude/longitude coordinate for a given US street address. Binary shared objects --------------------- The Geocoder::US module depends on being able to load a native extension module in its SQLite driver. For this reason, a version of libsqlite-ruby >= 1.3.0 is needed. The module is built and included in the .deb as `sqlite.so`, and it is installed in the same directory as the Ruby modules. This may not be ideal, but this makes it easy for the Geocoder::US library to find it there; otherwise, a configuration option would be necessary. REST API server --------------- The library's API centers on a single method 'geocode' to the Geocoder::US::Database class that takes an address string and returns a list of dicts containing the most likely matches with coordinates. The `geocode` method is wrapped in a very simple Sinatra application with a single endpoint `/geocode` and a single argument `q`, which returns the result of the geocode method in JSON format. The Sinatra web framework does not support running as a daemon on its own, so the Thin web server is used as a container for the application. This package creates an `/etc/geocoder-us` directory containing two files: `/etc/geocoder-us/geocoder.ru` is the "rackup" adapter between Thin and Sinatra and should probably not be changed. This file doesn't have to live in /etc, but I couldn't figure out where else to put it. `/etc/geocoder-us/thin.yml` contains the configuration options to run the Thin server. This file as packaged runs the REST server as the www-data user on port 8080. This file *probably* doesn't need to be changed, but if the server starts doing weird things, different options to control Thin's behavior can be set here. The package creates `/var/log/geocoder-us` and `/var/run/geocoder-us` directories for the Thin log file and PID file, respectively, and chowns them to www-data. An init script is also included in `/etc/init.d/geocoder-us`. It is heavily hacked from the default Debian init.ex script to support the weirdnesses of Thin, but it is LSB compliant and supports the `status` command. Where to put the database ------------------------- The location of the database file should be set in `/etc/default/geocoder-us`. The package creates a `/var/lib/geocoder-us` directory and configures the database location by default to be `/var/lib/geocoder-us/geocoder.db`. If you have an EBS volume containing a file called `geocoder.db`, for example, you can just mount the volume at `/var/lib/geocoder-us` and then start the server and all will be well.