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Functions for parsing tilematrixset from json

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This commit is contained in:
Dalibor Janák
2016-02-09 14:37:26 +01:00
parent 8b49aa2b8c
commit ab7862209a
1 changed files with 65 additions and 0 deletions
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65
tileserver.php
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@@ -718,6 +718,71 @@ class Wmts extends Server {
$this->getCapabilities();
}
}
/**
* Validates tilematrixset, calculates missing params
* @param Obrject $tileMatrix
* @return Object
*/
public function parseTileMatrix($tileMatrix){
for($i = 0; $i <= sizeof($tileMatrix[$i]); $i++){
if(!isset($tileMatrix[$i]['tile_size'])){
$tileMatrix[$i]['tile_size'] = array(256, 256);
}
if (!isset($tileMatrix[$i]['matrix_size'])) {
$tileMatrix[$i]['matrix_size'] = array(pow(2, $i), pow(2, $i));
}
//když není nebo když
if(!isset($tileMatrix[$i]['origin']) && isset($tileMatrix[$i]['extent'])){
$tileMatrix[$i]['origin'] = array($tileMatrix[$i]['extent'][0], $tileMatrix[$i]['extent'][4]);
}
if(!isset($tileMatrix[$i]['scale_denominator'])){
//constants
$tileMatrix[$i]['scale_denominator'] = null;
}
if(!isset($tileMatrix[$i]['pixel_size']) && $tileMatrix[$i]['pixel_size'][1] > 0){
}
//kontrola jestli piel size je kladná v obou osách
}
return $tileMatrix;
}
/**
* Calculates corners of tilematrix
* @param array $extent
* @param array $origin
* @param array $pixel_size
* @param array $tile_size
* @return array
*/
public function tilesOfExtent($extent, $origin, $pixel_size, $tile_size) {
//$minx, $miny, $maxx, $maxy = $extent;
function minsample($x, $f){
return $f > 0 ? floor($x / $f) : ceil(($x / $f) - 1);
}
function maxsample($x, $f){
return $f < 0 ? floor($x / $f) : ceil(($x / $f) - 1);
}
$tiles = array();
$tiles[] = minsample($extent[0] - $origin[0], $pixel_size[0] * $tile_size[0]);
$tiles[] =minsample($extent[1] - $origin[1], $pixel_size[1] * $tile_size[1]);
$tiles[] =maxsample($extent[2] - $origin[0], $pixel_size[0] * $tile_size[0]);
$tiles[] =maxsample($extent[3] - $origin[1], $pixel_size[1] * $tile_size[1]);
return $tiles;
}
/**
* Default TileMetrixSet for Pseudo Mercator projection 3857