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map.setExtent not setting right values

MatejSkerjanc

var factor = 0;
var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor)
map.setExtent(xtent);

alert(map.extent.xmin + ',' + map.extent.ymin + ',' +map.extent.xmax + ',' + map.extent.ymax );

I got this code, and the xtent of a map differs from the extent of xtent. Any practical reason behind it or is my code just faulty?

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Accepted answers

HemingZhu

var factor = 0;
var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor)
map.setExtent(xtent);

alert(map.extent.xmin + ',' + map.extent.ymin + ',' +map.extent.xmax + ',' + map.extent.ymax );

I got this code, and the xtent of a map differs from the extent of xtent. Any practical reason behind it or is my code just faulty?

You might want to add sr parameter. list this: var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor, map.spatialReference);

All comments

MatejSkerjanc

Found sollution which was pretty obvious

var xtent = new esri.geometry.Extent({
        "xmin":xmin,
        "ymin":ymin,
        "xmax":xmax,
        "ymax":ymax, "spatialReference": { "wkid":map.spatialReference.wkid }
});

map.setExtent(xtent, true); //When true, for maps that contain tiled map service layers, you are guaranteed to have the input extent shown completely on the map. (As of v1.3)
I did test this but before when my SR was wrong and it "crashed with error". Previously i had SR set to   "spatialReference": { "wkid":map.spatialReference } and it's wrong it seems.

Thank you guys

MatejSkerjanc

You are probably reading the values before the map actually changes extent. I suggest you listen to the map.onExtentChange event and then get the map extent values.

I'm creating a group of features common extent. Getting minx, miny, maxx, maxy from whole group and assigning it to map extent, so it zooms in/out on the whole group. And the group extent comes out just fine. The problem is the map.setExtent sets extent to different envelope

MatejSkerjanc

I've used the SR it didn't help thank you though.

I'll go with jgraysons and see if his help.

I'll report back guys thank you for now.

HemingZhu

var factor = 0;
var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor)
map.setExtent(xtent);

alert(map.extent.xmin + ',' + map.extent.ymin + ',' +map.extent.xmax + ',' + map.extent.ymax );

I got this code, and the xtent of a map differs from the extent of xtent. Any practical reason behind it or is my code just faulty?

You might want to add sr parameter. list this: var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor, map.spatialReference);

JohnGrayson

You are probably reading the values before the map actually changes extent. I suggest you listen to the map.onExtentChange event and then get the map extent values.

var factor = 0;
var xtent =new esri.geometry.Extent(xmin-factor, ymin-factor, xmax+factor, ymax+factor)

var mapExtentChangeHandle = dojo.connect(map, 'onExtentChange', function(newExtent){
dojo.disconnect(mapExtentChangeHandle);

alert(dojo.replace("{xmin},{ymin},{xmax},{ymax}", newExtent);
alert(map.extent.xmin + ',' + map.extent.ymin + ',' +map.extent.xmax + ',' + map.extent.ymax);
});

map.setExtent(xtent);

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