Asynchrone clients? (continues vectordata retrieval / use gdal directly?)

[Eduard Witteveen]

Marcos Cobeña schreef:
 >> Does anyone know a asynchrone (opensource) web-clients that retrieve
 >> gisdata?
 >> I would like to use a client that keeps retrieving data from the area,
 >> but in which you can also click / pan / zoom in the meantime(with
 >> keeping already loaded vector data).
> Give a try to OpenLayers (http://openlayers.org/), just cool. :-)
Thank you, this openlayers viewer really looks great. However, i want to 
have the viewer running on vector data.

Currently we have a prototype-flashviewer(based upon the flash output of 
mapserver), but due to the amount of data in the viewer, the rendering 
becomes really slow (the conversion movie --> memory takes a lot of time)

>> If i would have to implement it i know it can be done by using the
>> "google" way of retrieving square's of data. Is there also a way to make
>> a streaming sollution with mapserver, or should i write my own server
>> using GDAL directly..(fetch objects around a certain coordinate with
>> ((distance to coordinate) * area) as order for which one to send first)
Maybe i should ask this question at the GDAL list?
-- 
Ing. Eduard Yeb Witteveen           Software Engineer
Hawar Information Technology bv   lid Dijkoraad Groep
De Wymerts 7  8701 WT                        Bolsward
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