[Openstreetmap-dev] Applet hacking

[Frank Mohr]

Erik Johansson wrote:
>>i'd really like to have that "changed since" feature i proposed
>>sometimes ago on the wiki.
>>
> 
> 
> You mean onlt send the data that has changed since this date, i.e the
> difference? Yes that would be a good idea, but I would also like to
> vote for implementing the HTTP header "Last-modified:" and
> "If-Modified-Since" aka IMS for posibilities to do caching..
> 
> See:
> http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.29

forgot the wiki link:
http://wiki.openstreetmap.org/index.php/REST#Fetch_only_modified_data

"If-Modified-Since" was proposed there

> 
> 
>>Advantages:
>>- less network load for database request if people or offline editors
>>  cache some region localy
>>- people "feeling responsible" for an area have an easy way to see
>>  what's changed
> 
> 
> + less server load? If data is indexed by date..

+ distributed readonly map/database servers

	

	
		
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