[OpenLayers-Users] loading heavy WFS. solutions?

[G. Allegri]

This is exactly the other solution we're considering.

Two approaches:
1 - WMS until a certain zoom and then WFS
2 - WMS and feature overlay only for "clicked features"

3 - A mix from the twos: WMS with click->overaly, and then WFS at certain zooms.

A specific question for Eric: did you implement grid-map linking in Mapfish?


2008/9/18 Eric Lemoine <eric.c2c at gmail.com>:
> Hi.
>
> We got pretty good results here by using WMS along with
> GetFeatureInfo-like queries with Handler.Hover. The features resulting
> from a query can be added to a vector layer and/or to an external grid
> with 1:1 interaction between the grid records and the features on the
> map. We found this to be a good tradeoff between user interaction
> (vector) and performance (raster).
>
> Cheers,
>
> Eric
>
> 2008/9/18, Christopher Schmidt <crschmidt at metacarta.com>:
>> On Wed, Sep 17, 2008 at 03:10:00PM -0700, percy wrote:
>>> how would the click handler deal with hover events for a WMS of polygon
>>> features?
>>
>> It wouldn't. You'd use a Hover Handler for something like that. But the
>> user didn't mention that aspect of things.
>>
>> There are limitations to what you can do in the browser. Displaying 12MB
>> of binary data as vectors are about 11.9MB beyond them.
>>
>> Regards,
>> --
>> Christopher Schmidt
>> MetaCarta
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>