[OpenLayers-Users] very slow map using WKT Multipolygon with a lot of Points

[Sergeant_york]

Hello again,

I strongly agree with wms solution from one of the posts in this topic. If
you can use serverside capabilities it will be the best solution and as far
as I know people uses wms for showing geometries that has many vertexes. 

for this you can:
1- use serverside wms service (for example geoserver it also reads shape
files)
2- get boundaries data as images from server and apply sld for best look
(google, bing etc works like that)
3- show these borders as OpenLayers.Layer.Wms layer, you can even transform
features in different reference systems (for example from epsg:4326 to
epsg:900913)
4- you can also cache images in server for best speed

with this:
1- Performance issues will be solved at limited amount of wms layers 
2- Drawing will be done in server so you don't have to keep millions of
vertexes in clientside
3- can get feature info (with vertexes and attributes) with usng
OpenLayers.Control.WMSGetFeatureInfo

but with wms layer you cannot:
1- edit any geometries in this layer, or you can edit with the help of
vector layer but costs more effort
2- change layer styling easy as clientside styling with vectors. It costs a
bit more effort to apply dynamic styling
3- work with only clientside application. You need a server, geoserver for
drawing and datastore (in this case your shape file) which is inside of the
server

I changed my idea for simplification with respect to zoom levels, because
applying this algorithm to every feature in vector layer in clientside can
also cause performance issues(tryed and failed). Yet it is nice to use to
get data from server so still in the future if you will use this one, every
database accepts OGC standarts has simplify method or you can check this:

http://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm





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