[OpenLayers-Users] Marker Problem when having too much data : Help

[Greg Allensworth]

> Here "respJSONObject" length is 13783. With this large amount of data,
> my IE browser is simply hanging out with out showing the marker layers.

Yeah, I bet it it; 13k features is too many for vector layers, and 
crashing the browser is what happens. Even if you weren't fetching JSON, 
if you manually added 1 feature at a time, 13k would still crash the 
browser. I'd recommend Not Doing That.

One approach is to paginate the points, as one would do with 
Openlayers.Strategy.Paging That is, draw only the first 100 points and 
put a button to View More, which would call layer.removeAllfeatures() 
and fetch the next 100. If you have the results sorted by distance or 
relevance or the like, such a paging behavior is actually quite 
user-friendly.

Paginating means more complication on your side: that URL serving up 
JSON, would need to accept a "page" or "offset" value and know to fetch 
those specific records. So it's not entirely simple, but it would allow 
you to display 13k points, though not all at once.

-- 
Greg Allensworth
Web GIS Developer, GreenInfo Network
BS  A+  Network+  Security+  Linux+  Server+