Try usingvar ext = new esri.geometry.Extent({"xmin":((parseFloat(arr.X)) - 1000, "ymin":(parseFloat(arr.Y) - 1000),"xmax": (parseFloat(arr.X) + 1000), "ymax":(parseFloat(arr.Y) + 1000), "spatialReference":{"wkid": 3414}}); map.setExtent(ext);