topic Get Zoom level of map for use in centerAndZoom() in ArcGIS JavaScript Maps SDK Questions

Get Zoom level of map for use in centerAndZoom()

DavidMelville — Mon, 09 May 2011 14:31:47 GMT

Hi all,

For the purposes of synchronizing two maps on the same webpage, how can I get the zoom level of one map to use in the method centerAndZoom() of the other map?

Thanks is advance,
Dave

Re: Get Zoom level of map for use in centerAndZoom()

derekswingley1 — Mon, 09 May 2011 15:14:45 GMT

Take a look at the compare maps sample: http://www.arcgis.com/home/webmap/templates/Compare/Configure/index.html

More info: http://www.arcgis.com/home/item.html?id=a35a934152dc44dda8d793a2303f0df1

Relevant code is the syncMapLocations() function here: http://www.arcgis.com/home/webmap/templates/Compare/Configure/javascript/layout.js

Re: Get Zoom level of map for use in centerAndZoom()

JeffPace — Wed, 11 May 2011 14:07:12 GMT

cant you just use

this.map2.setLevel(this.map.getLevel()));

assuming they use the same tiling scheme?

you could even put it in an event listener for onextentchange

dojo.connect(this.map, "OnExtentChange", this, "changeMap2");

function: changeMap2(){
this.map2.setLevel(this.map.getLevel()));
}

pardon my terrible pseudo code.