Jump to Lat / Lon --- Convert X,Y to GIS Coordinates
richard.greenwood at GMAIL.COM
Thu Dec 2 22:43:40 EST 2004
On Thu, 2 Dec 2004 13:48:02 -0500, Shanton, James A
<james.shanton2 at nscorp.com> wrote:
> Is there an easy way to jump to a GIS Lat/Lon location with Mapserver?
> I'm also trying to convert X and Y (returned by JBox) to GIS Coordinates,
> but am not having any luck finding a sample.
jBox returns screen pixels, so you need to convert screen pixels to
map_units. It's pretty simple:
map_width = max_x - min_x
map_units/pixel = map_width / image_width
GIS_X = min_x + pos_x * map_units/pixel
where pos_x is the pixel x coordinate returned by jBox.
richard.greenwood at gmail.com
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