[OpenLayers-Users] A LOT of features

[Greg Allensworth]

Well explained, Armin.

Short version: it's not the features, but the vertices.

A significant factor there is the parsing of the vertices: GML/XML is 
significantly more "expensive" than JSON. If you're able to control the 
format of the data you're loading, try making a JSON representation of 
the data and including fewer attributes; this means less processing time 
figuring out the data, which may help raise your ceiling.

If you have control over the dataset you're trying to render, you can 
try a "simplify" on the data (this isn't an OpenLayers thing, it means 
fudging your data server-side). This removes vertices and accuracy, in 
exchange for raising the ceiling further. This can get dicey, though: it 
would be wholly unsuitable for surveying applications, but may work fine 
for indicating general areas such as state boundaries at large scales.

-- 
Greg Allensworth, Web GIS Developer
BS  A+  Network+  Security+  Linux+  Server+
GreenInfo Network - Information and Mapping in the Public Interest
564 Market Street, Suite 510  San Francisco CA 94104
PH: 415-979-0343 x302  FX: 415-979-0371    email: gregor at greeninfo.org
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