[GIS] Openlayers zoomToExtent from array of coordinates

openlayers-2

I have a dropdown list. On Selection, it will request extent of selected property to database (PostgreSQL). I am using PHP for server-side processing.

At client-side on console log gives extent output result (variable res):

[74.3965356273929, 75.2484319931094, 35.6450698628058, 34.776235256942]

Also I am sure that coordinates are float and not string using parseFloat() function. later I am passing that variable to OpenLayers.Bounds.

    var extent = new OpenLayers.Bounds(res);
    map.zoomToExtent(extent);

OpenLayers.Bounds gives following output:

OpenLayers.Bounds.OpenLayers.Class.initialize {left: 74.396535627393, bottom: 75.248431993109, right: 35.645069862806, top: 34.776235256942, left: null…}

Which is I guess correct. But Openlayers is not zooming to the provided extent and it is zooming to maximum zoom level at current map view only.

Best Answer

The order of attributes when you create an OpenLayers.Bounds object, you have to order the arguments like this: minx, miny, maxx, maxy.

See the following example:

http://jsfiddle.net/KfkwV/2/

Related Solutions

Get Coordinates from Polygon in OpenLayers

you can get the coordinates of your shape as below code:

vectorLayer.features[i].geometry.getBounds();

and also you can get covered area, centroid of your shape, vertices of ypur shape, length or geodesic area.

if you want specific feature bounds, you can write order of your feature [i] place like this:

vectorLayer.features[3].geometry.getBounds();

and below code will give all bounds of your features example :

var ft = vectorLayer.features;
for(var i=0; i< ft.length; i++){
    console.log(vectorLayer.features[i].geometry.getBounds());
};

I hope that will be useful for you....

[GIS] zoomToExtent on Vector Layer

When you create the bounds variable by instantiating the class OpenLayers.Bounds, it seems to me that you are not using the constructor method properly. According to the OpenLayers API (http://goo.gl/Nq0Ry):

OpenLayers.Bounds Construct a new bounds object. Coordinates can either be passed as four arguments, or as a single argument.

Parameters (four arguments)

left {Number} The left bounds of the box. Note that for width calculations, this is assumed to be less than the right value.

bottom {Number} The bottom bounds of the box. Note that for height calculations, this is assumed to be more than the top value.

right {Number} The right bounds.

top {Number} The top bounds.

Best Answer

Related Solutions

Get Coordinates from Polygon in OpenLayers

[GIS] zoomToExtent on Vector Layer

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