[OpenLayers-Users] loading heavy WFS. solutions?

[Simone Gadenz]

My two cents:

- if the WFS serves a large number of small polygon I believe you should set
an upper zoom limit to avoid the map to be really crowded and not readable,
hence not usable from your demanding users;
- we had a similar problem with a point layer of global critical
infrastructures and we approached the problem in a sligthly different way:
	1- we serve the layer as wms until a certain scale, the user can
click on the feature,  	the server send back all the information of that
point and a popup shows those info. No 	hoovering at this scale
 	2- at a larger scale we publish the layer as wfs limiting the number
of features	 	returned; obviously it is important to estimate the
limit on the number of features 	returned according to the spatial
density of the features in the layer
- in your case I probably would follow a similar strategy but I would send
back to the user the polygon corresponding to the clicked point as vector
feature (GML, GeoJSON, etc...)

Cheers

Simone




-----Original Message-----
From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] On
Behalf Of G. Allegri
Sent: 18 September 2008 00:13
To: percy
Cc: Robert Sanson; users at openlayers.org
Subject: Re: [OpenLayers-Users] loading heavy WFS. solutions?

> how would the click handler deal with hover events for a WMS of polygon
> features?

In fact there's no way of dealing with it.
And above all the problem of highlighting remains.
I definetly need WFS...
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