We also know the latlng for the above two reference points.

How do I set the box north-east and south-west corners so that I can place it on the map.

Appreciate any help/pointers.

Thanks

NorthEast (topRight) points (70.495574, -102.304688)
topRight[0] = 70.495574;
topRight[1]= -102.304688;

SouthWest(BottomLeft) points (-59.712097, 47.109375)
BottomLeft[0] =-59.712097;

and my point is under this getBounds

we have a condition like

if(lat > bottomLeft[0] and lat BottomLeft[1] and lng < TopRight[1])
{}
this condition falils in some points even though its under that Bounded Rectangle
and the actual point is (30.145127,75.234) between those top and bottom points

Here’s the method:

# returns a hash of top right and bottom left bounds
def self.bounds(collection)
top = 0
bottom = 0
right = 0
left = 0
initially_set = false
collection.each do |point|
if point.lat and point.long
if !initially_set or point.long > top
top = point.long
end
if !initially_set or point.long right
right = point.lat
end
if !initially_set or point.lat < left
left = point.lat
end
initially_set = true
end
end
# you could add 10% to each value here
# if your map is correct portioned (otherwise)
# your centre will be skewed
# now create the hash
result = Hash.new
result[:top] = top
result[:bottom] = bottom
result[:right] = right
result[:left] = left
return result
end

And then in the map definition…

// if we have a collection of items, set the map to fit them all
// Define the two corners of the bounding box
var sw = new GLatLng(, );
var ne = new GLatLng(, );
var bounds = new GLatLngBounds(sw, ne);

bounds.extend(new GLatLng(lat, lng));

Maybe that’s the reason it doesn’t work properly?

I haven’t looked at your new method yet.

I found new method how to set zoom level of a google map base on markers.

maybe you can check this out for your reference. Thanks

Set zoom level of a google map base on markers

I have never encountered the error you’re talking about myself. Could be a bug in the API?

var bounds = new GLatLngBounds();
bounds.extend(GLatLng(lat:Number, lng:Number));

so you have to assign all marker by using this code
bounds.extend(GLatLng(lat:Number, lng:Number));

but sometimes the function of :
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
didn’t work properly and will returns an incorrect zoom level. until now i can’t figure out this problem.

In the Google Maps API there’s the GLatLngBounds class which is a representation of a BoundingBox. Some overlays such as GPolyLine and GPolygon has a getBounds() method that returns a GLatLngBounds. In the case of markers I don’t know of any easy way to do it. I guess one have to do as you suggest and loop through them all to extract min and max values.

I can imagine doing a minimum and maximum loop thru all the data, but it seems like there should be an easier way to get via an api call of some sort.