[OSM-dev] History on lower ZL's

[Tom Hughes]

On 04/11/12 16:53, Alex Barth wrote:

> The history tab is greyed out on lower ZL's - why is that? Are there concerns with the expense of the queries powering lower ZL's?

Basically, yes.

> If I make up random low-ZL bounding boxes in high-contrib areas I'm still getting snappy responses:
>
> http://www.openstreetmap.org/browse/changesets?bbox=0.98%2C47.19%2C21.87%2C54.58

That's a bug really - there should be some checks in there to prevent 
abuse like that.

There's nothing very scientific about the limit AFAIK it was just a 
rough limit based on a usability vs not letting people force scans of 
the entire changeset table kind of thing.

It's not like such a view is very useful, then again the global 
changeset list is pretty much useless anyway due to the amount of global 
noise from all the bots and semi-automated bulk edits.

Tom

-- 
Tom Hughes (tom at compton.nu)
http://compton.nu/