[OSM-dev] osmo - Populate a MongoDB collection with OpenStreetMap data

[Frederik Ramm]

Hi,

On 09/11/2011 10:31 PM, Andreas Kalsch wrote:
> Once the data
> is in Mongo, you can do a lot with it with simple means since it's no
> SQL

[...]

> osmo is just suited to give you fast access
> by primary key.

Maybe then using SQL would help ;)

I like to approach OSM projects in a result-oriented rather than 
technology-oriented fashion. I'm not prepared to try out MongoDB just 
because "it's no SQL"; but if someone could demonstrate that, for 
example, they can load the whole planet into MongoDB on a single machine 
in less than a day, effortlessly apply minutely updates and still have a 
quick answer to queries like "give me all relations that have members in 
this bounding box", then I'd be interested. Or, indeed, anything else 
where MongoDB outperforms that which I currently use.

Are there any known examples like that?

> Probably my data model could inspire a discussion about simplifying data
> models, too?

Your code does not seem to properly support UTF-8 (it assumes that keys 
and values cannot be longer than 256 bytes whereas a 256-character UTF-8 
string can be over 1kb in size).

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"