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POHow can I convert a Bing maps quadkey into zoom level, x-coordinate and y-coordinate using PHP?
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  1. POHow can I convert a Bing maps quadkey into zoom level, x-coordinate and y-coordinate using PHP?
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    copied!<p>I'm trying to write a script in PHP that will accept a Bing maps quadkey and then return the zoom level, x-coordinate and y-coordinate so that I can use my own maps. I've based my code off the C# example code provided by Microsoft as such <a href="http://msdn.microsoft.com/en-us/library/bb259689.aspx" rel="nofollow">here</a>:</p> <pre><code>public static void QuadKeyToTileXY(string quadKey, out int tileX, out int tileY, out int levelOfDetail) { tileX = tileY = 0; levelOfDetail = quadKey.Length; for (int i = levelOfDetail; i &gt; 0; i--) { int mask = 1 &lt;&lt; (i - 1); switch (quadKey[levelOfDetail - i]) { case '0': break; case '1': tileX |= mask; break; case '2': tileY |= mask; break; case '3': tileX |= mask; tileY |= mask; break; default: throw new ArgumentException("Invalid QuadKey digit sequence."); } } } </code></pre> <p>This is my recreation using PHP that isn't operating as I would expect:</p> <pre><code>$quadkey = intval($_GET["quadkey"]); $zoom = count($quadkey); for ($i = $zoom; $i &gt; 0; $i--) { $mask = 1 &lt;&lt; ($i - 1); $quadkey_array = str_split($quadkey); switch ($quadkey_array[$zoom - $i]) { case 0: break; case 1: $x |= $mask; break; case 2: $y |= $mask; break; case 3: $x |= $mask; $y |= $mask; break; default: echo "Error"; } echo "/" . $zoom . "/" . $x . "/" . $y . ".png"; } </code></pre> <p>The example quadkey I'm using and the expected results are as follows:</p> <p>Quadkey: <code>120202111102203112</code> X-coord: <code>134926</code> Y-coord: <code>86121</code> Zoom: <code>18</code></p> <p>Would anyone be able to shed some light on what I'm doing wrong? I've been looking all around and can't find any other example code to examine! Thanks all!</p>
 

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