[Openstreetmap-dev] editing applet very unresponsive

SteveC steve at fractalus.com
Sun Aug 28 07:35:41 BST 2005


* @ 28/08/05 07:30:13 AM lars at aronsson.se wrote:
> Tom Carden wrote:
> 
> > Also, part of the unresponsiveness is down to the overhead of 
> > the XML-RPC API, which we hope to alleviate with a new REST API 
> 
> If the problem is that you try to transfer the coordinates of 5000 
> GPS samples, this is not going to improve by moving from one kind 
> of API to another.  You must cut down the amount of data that 
> needs to be transferred.  Producing a bitmap image of the grey GPS 
> samples on the server and transferring it as a GIF or PNG image 
> over the network should be faster.  It can then be used in the 
> applet as a background slate for drawing the black nodes and 
> lines.  If zooming and panning are locked to discrete levels, the 
> images can be cached on the server.  The cached images only need 
> to be cleared when new GPS points are uploaded.

Thats exactly what I'm planning to do :-)

have fun,

SteveC steve at fractalus.com http://www.fractalus.com/steve/




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