Hierarchical ordering and/or clustering of stops

[shekhark]

For enhancing SMS search (Khodadad Circle, railways stations, other stops with close variants).

[batpad]

Hmm .. the idea for this is to create like a StopGroup model or so, where one can "cluster" stops that are very close by .. Ideally, lets try and see if we can figure out a way to do this with a database query rather than creating a new model .. Can we do something like "fetch all stops within a 500m radius that have a name similarity threshhold of 0.1" ? or something like this? Is there anywhere this would be useful other than clustering of routes returned in SMS?

[shekhark]

This is related to #133 and bears further investigation and discussion on the best way to go about this in the database. It will be a manual process.