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