PHPMapscriptSnippet1

Here is a code snippet from Antti Roppola, there is also another example in the GMap demo application that is a little fancier (GMap demo http://www2.dmsolutions.ca/gmap/gmap75.phtml download demo: http://dl.maptools.org/dl/). {{{
/**

• converts pixel units into map units

• @param int $click_x coordinate X in pixels

• @param int $click_y coordinate Y in pixels

• @param array $current_extent holds the current extent of the map (XMin, YMin, XMax, YMax)

• @global map object

• @return array [0]=> X in map units; [1]=> Y in map units
  */
  function click2map ($click_x, $click_y, $current_extent) {
  global $map;

   $x_pct = ($click_x / $map->width);                                                                                                                                                                                        
   $y_pct = 1 - ($click_y / $map->height);                                                                                                                                                                                   
                                                                                                                                                                                                                             
   $x_map = $current_extent[0] + ( ($current_extent[2] - $current_extent[0]) * $x_pct);                                                                                                                                      
   $y_map = $current_extent[1] + ( ($current_extent[3] - $current_extent[1]) * $y_pct);                                                                                                                                      
                                                                                                                                                                                                                             
   return array($x_map, $y_map);                                                                                                                                                                                             
  

}
}}}

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