Do OpenLayers maps always show/flash an empty screen while zooming?

Question

When double-clicking on an OpenLayers map, the screen is momentarily blank while the next zoom level draws.

Is this avoidable? It's not ideal, given that many other mapping APIs show a smooth zooming effect.

Thanks

Answer 1

You will have to change the layer transitionEffect to 'resize'. According to OpenLayers documentation:

transitionEffect

{String} The transition effect to use when the map is panned or zoomed.

There are currently two supported values

• null

  No transition effect (the default).

• resize

  Existing tiles are resized on zoom to provide a visual effect of the zoom having taken place immediately. As the new tiles become available, they are drawn over top of the resized tiles.

http://dev.openlayers.org/releases/OpenLayers-2.7/doc/apidocs/files/OpenLayers/Layer-js.html#OpenLayers.Layer.transitionEffect