geospatial queries in javascript [closed]

Answer 1

You can extend OpenLayers to support this operation. I make this using OpenLayers native functions. Try this, maybe you must fix and customize this code.

// The first object is instanced using data given from gmaps
var objBound1 = new OpenLayers.Bounds();
objBound1.extend(new OpenLayers.LonLat(2,2));
objBound1.extend(new OpenLayers.LonLat(8,8));

// The second object is instanced using data given from gmaps
var objBound2 = new OpenLayers.Bounds();
objBound2.extend(new OpenLayers.LonLat(5,5));
objBound2.extend(new OpenLayers.LonLat(10,10));

// Extract limits from our objects
var arrBound1 = objBound1.toArray();
var arrBound2 = objBound2.toArray();

// Determine an virtual bound. It must contain our two bounds
var intMinLeft = arrBound1.left < arrBound2.left ? arrBound1.left : arrBound2.left;
var intMinTop = arrBound1.top < arrBound2.top ? arrBound1.top : arrBound2.top;
var intMaxRight = arrBound1.right > arrBound2.right ? arrBound1.right : arrBound2.right;
var intMaxBottom = arrBound1.bottom > arrBound2.bottom ? arrBound1.bottom : arrBound2.bottom;

// Search all points of virtual bound, storing the points contained in bound1 or bound2
var objBoundResult = new OpenLayers.Bounds();
for(var intI = intMinLeft; intI < intMaxRight; intI++) {
    for(var intJ = intMinTop; intJ < intMaxBottom; intJ++) {
        if(objBound1.containsLonLat(new OpenLayers.LonLat(intI, intJ)) || objBound2.containsLonLat(new OpenLayers.LonLat(intI, intJ))) {
            objBoundResult.add(intI, intJ);
        }
    }
}

// objBoundResult is what you want