[OpenLayers-Users] Load Tile on Mouse Stop?

[Alexander Petkov]

On Mon, Apr 13, 2009 at 9:44 AM, Alexander Petkov <greenkov at gmail.com> wrote:
> On Mon, Apr 13, 2009 at 9:22 AM, Brian Walawender
> <Brian.Walawender at noaa.gov> wrote:
>> Hello,
>>
>>
>>
>> The National Weather Service (NWS) has recently released a Beta version of
>> its new watch, warning, and radar viewer (http://radar.srh.noaa.gov). It
>> utilizes the OpenLayers API and has been met with acclaim from many of our
>> customers.
>>
>>
>>
>> However, one common complaint, is how “heavy” our map is. This is
>> understandable given the amount of data we pile on the API at initialization
>> (5 radar layers, 1 warning layer, and a Google basemap). Through playing
>> with the API’s from other sites, it’s come to my attention one thing that
>> might be contributing to much of that heaviness: as soon as the user begins
>> to pan, all of our layers begin to start loading – even before the user has
>> finished panning. Other sites that have managed come up with a much more
>> smooth scrolling have gone with the tact of only attempting to load tiles
>> for the new viewport AFTER the user has completed scrolling and has released
>> the left mouse button (Example:
>> http://www.wunderground.com/wundermap/?lat=41.55956&lon=-90.55358&zoom=8&type=hyb&rad=1&rad.num=6&rad.spd=25&rad.opa=100&rad.stm=0&wxsn=0&svr=0&cams=0&sat=0&riv=0&mm=0&hur=0&fire=0&tor=0
>> – using Google Maps API, however).
>>
>>
>>
>> Would you be able to offer any advice as to how we could accomplish a
>> similar setup? That is, only looking to load more info AFTER the user has
>> finished scrolling on the map.
>>
>>
>>
>> Thanks.
>>
>>
>>
>> bw

One more thing--the wunderground example was also loading tiles during
panning. I panned around the map without releasing the mouse button,
and blank tiles were getting filled even though I hadn't stop moving
the mouse or released the mouse button. But that was one quick tile
serving, for sure.

Alex