--- a/betweenpoint.submit.php +++ b/betweenpoint.submit.php @@ -1,1 +1,76 @@ +<?php +/* + * GeoPo Encode in PHP + * @author : Shintaro Inagaki + * @param $location (Array) + * @return $geopo (String) + */ +function geopoEncode($lat, $lng) { + // 64characters (number + big and small letter + hyphen + underscore) + $chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_"; + + $geopo = ""; + $scale = 7; + + // Change a degree measure to a decimal number + $lat = ($lat + 90) / 180 * pow(8, 10); + $lng = ($lng + 180) / 360 * pow(8, 10); + // Compute a GeoPo code from head and concatenate + for($i = 0; $i < $scale; $i++) { + $geopo .= substr($chars, floor($lat / pow(8, 9 - $i) % 8) + floor($lng / pow(8, 9 - $i) % 8) * 8, 1); + } + return $geopo; +} + +/* + * GeoPo Decode in PHP + * @author : Shintaro Inagaki + * @param $geopo (String) + * @return $location (Array) + */ +function geopoDecode($geopo) { + // 64characters (number + big and small letter + hyphen + underscore) + $chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_"; + // Array for geolocation + $location = array (); + + for ($i = 0; $i < strlen($geopo); $i++) { + // What number of character that equal to a GeoPo code (0-63) + $order = strpos($chars, substr($geopo, $i, 1)); + // Lat/Lng plus geolocation value of scale + $location['lat'] = $location['lat'] + floor($order % 8) * pow(8, 9 - $i); + $location['lng'] = $location['lng'] + floor($order / 8) * pow(8, 9 - $i); + } + + // Change a decimal number to a degree measure, and plus revised value that shift center of area + $location['lat'] = $location['lat'] * 180 / pow(8, 10) + 180 / pow(8, strlen($geopo)) / 2 - 90; + $location['lng'] = $location['lng'] * 360 / pow(8, 10) + 360 / pow(8, strlen($geopo)) / 2 - 180; + $location['scale'] = strlen($geopo); + + return $location; +} + +$conn = pg_connect("dbname=bus user=postgres password=snmc"); +if (!$conn) { + echo "An error occured.\n"; + exit; +} +$xml = simplexml_load_file("04-locatebetweenpoints.osm"); + +/* Access the <rating> nodes of the first movie. + * Output the rating scale, too. */ +foreach ($xml->node as $node) { + $geoPo = geopoEncode((float)$node['lat'],(float)$node['lon']); + $node['lat'] = (int) ((float)$node['lat']*10000000); + $node['lon'] = (int) ((float)$node['lon']*10000000); + echo($node['lat'].",".$node['lon']."=$geoPo<br>"); + $sql = "INSERT INTO stops (geohash, lat, lng) VALUES('$geoPo','{$node['lat']}','{$node['lon']}')"; + $result = pg_query($conn, $sql); + if (!$result) { + echo("Error in SQL query: " . pg_last_error() ."<br>\n"); + } +flush(); + +} +?>