New file |
0,0 → 1,58 |
<?php |
/** |
* Author : Julien Moquet |
* |
* Inspired by Proj4php from Mike Adair madairATdmsolutions.ca |
* and Richard Greenwood rich@greenwoodma$p->com |
* License: LGPL as per: http://www.gnu.org/copyleft/lesser.html |
*/ |
/* similar to equi.js FIXME proj4 uses eqc */ |
class Proj4phpProjEqc { |
|
public function init() { |
|
if( !$this->x0 ) |
$this->x0 = 0; |
if( !$this->y0 ) |
$this->y0 = 0; |
if( !$this->lat0 ) |
$this->lat0 = 0; |
if( !$this->long0 ) |
$this->long0 = 0; |
if( !$this->lat_ts ) |
$this->lat_ts = 0; |
if( !$this->title ) |
$this->title = "Equidistant Cylindrical (Plate Carre)"; |
|
$this->rc = cos( $this->lat_ts ); |
} |
|
// forward equations--mapping lat,long to x,y |
// ----------------------------------------------------------------- |
public function forward( $p ) { |
|
$lon = $p->x; |
$lat = $p->y; |
|
$dlon = Proj4php::$common->adjust_lon( $lon - $this->long0 ); |
$dlat = Proj4php::$common . adjust_lat( $lat - $this->lat0 ); |
$p->x = $this->x0 + ($this->a * $dlon * $this->rc); |
$p->y = $this->y0 + ($this->a * $dlat ); |
return $p; |
} |
|
// inverse equations--mapping x,y to lat/long |
// ----------------------------------------------------------------- |
public function inverse( $p ) { |
|
$x = $p->x; |
$y = $p->y; |
|
$p->x = Proj4php::$common->adjust_lon( $this->long0 + (($x - $this->x0) / ($this->a * $this->rc)) ); |
$p->y = Proj4php::$common->adjust_lat( $this->lat0 + (($y - $this->y0) / ($this->a )) ); |
return $p; |
} |
|
} |
|
Proj4php::$proj['eqc'] = new Proj4phpProjEqc(); |