Hi,
I have a scenario in which there are 24 Vector layers. I am adding plenty of
features into these layers.
For example: 16000 feature to every layer (which means 16000 * 24 total
features in 24 different layers)
And once the features are added, I want to switch b/w these layers with certain
interval in order to see kind of animation.
I am using setInterval function of JavaScript and showing/hiding the layer
visibility after certain interval using "setVisibility" function of open layers.
However, I believe that setVisibility function is re-drawing the features every
time it is called. I have seen that there is another function called
"layer.display"
which can be used to show and hide the layers. But this doesn't work in my case
because I set the layer visibility of all layers to false before adding the
features to map.
For better explanation, pseudo code as follows:
1. Request from client - Draw Feature on map
2. Request sent to server for fetching data ( geometry value and other
attributes)
3. Response received.
4. Set layer's visibility to false - before creating features so that adding
features are bit faster.
5. Create vector features on client side and add them to corresponding layers.
6. Once the feature creation is finished, set Visibility of one layer(first
one) to true.
7. Finally, allow user to switch between layer with certain interval by
providing a play button.
8. Pressing on play button start switching between layers. (using setVisibility)
The problem in above case is that, setting layer visibility to true and false
is bit slow when there are more features.
Is there any alternative function or approach i can use to implement this
behaviour using open layers ?
Best Regards,
Rajat Arora
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