[OSM-dev] OpenLayers, GeoRSS and annotations demo

[Dan Karran]

On 6/15/06, nick at hogweed.org <nick at hogweed.org> wrote:

> Currently an icon appears at the point that was clicked. However I agree these
> could be confused with ordinary OSM features, a pushpin like graphic - like
> the OpenLayers default - would be better.

Ah, then it may just be that I was using Safari at the time and it's
possible it doesn't do it in Safari at the moment.

> The only change to annotations  on my site which would affect OSM as a whole
> would be deletion of the features. I don't intend to add facilities such as
> the ability to move an annotated feature - not yet anyway.

Fair enough, that simplifies it a little I guess.

> That is an intrinsic problem with using planet-derived data, but that's really
> the only option at the moment. I'd imagine when OSM grows and has more server
> power, it will be sensible for OSM rendering clients to send OSM a map
> request, grab the raw XML and render locally, thus always keeping up to date.
>
> Sidetracking slightly, it's probably better that even in this hypothetical
> future scenario, clients of OSM data work off a copy of the OSM server which
> is read only, as the versioning stuff slows down database queries
> significantly, particularly for ways.

With the suggested improved queries there things could speed up
dramatically anyway. But clients that are reading should probably be
reading from a read-only slave anyway, with all the writing (and
versioning) happening on the master db.


Cheers,
Dan

-- 
Dan Karran
dan at karran.net
www.dankarran.com