--- a/include/common-geo.inc.php +++ b/include/common-geo.inc.php @@ -1,1 +1,151 @@ + $mapPoint) { + $markers.= $mapPoint[0] . "," . $mapPoint[1] . "," . $markerImage . ($index + 1); + if ($index + 1 != sizeof($mapPoints)) $markers.= "|"; + if ($mapPoint[0] < $minlat) $minlat = $mapPoint[0]; + if ($mapPoint[0] > $maxlat) $maxlat = $mapPoint[0]; + if ($mapPoint[1] < $minlon) $minlon = $mapPoint[1]; + if ($mapPoint[1] > $maxlon) $maxlon = $mapPoint[1]; + $totalLat+= $mapPoint[0]; + $totalLon+= $mapPoint[1]; + } + if ($zoom == 0) { + $mapwidthinmeters = distance($minlat, $minlon, $minlat, $maxlon); + foreach (array_reverse($metersperpixel, true) as $zoomLevel => $maxdistance) { + if ($zoom == 0 && $mapwidthinmeters < ($maxdistance + 50)) $zoom = $zoomLevel; + } + } + $center = $totalLat / sizeof($mapPoints) . "," . $totalLon / sizeof($mapPoints); + } + $output = ""; + if ($collapsible) $output.= '

Open Map...

'; + $output.= '
'; + if ($collapsible) $output.= '
'; + return $output; +} +function distance($lat1, $lng1, $lat2, $lng2, $roundLargeValues = false) +{ + $pi80 = M_PI / 180; + $lat1*= $pi80; + $lng1*= $pi80; + $lat2*= $pi80; + $lng2*= $pi80; + $r = 6372.797; // mean radius of Earth in km + $dlat = $lat2 - $lat1; + $dlng = $lng2 - $lng1; + $a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2); + $c = 2 * atan2(sqrt($a) , sqrt(1 - $a)); + $km = $r * $c; + if ($roundLargeValues) { + if ($km < 1) return floor($km * 1000); + else return round($km,2)."k"; + } else return floor($km * 1000); +} +function decodePolylineToArray($encoded) +{ + // source: http://latlongeeks.com/forum/viewtopic.php?f=4&t=5 + $length = strlen($encoded); + $index = 0; + $points = array(); + $lat = 0; + $lng = 0; + while ($index < $length) { + // Temporary variable to hold each ASCII byte. + $b = 0; + // The encoded polyline consists of a latitude value followed by a + // longitude value. They should always come in pairs. Read the + // latitude value first. + $shift = 0; + $result = 0; + do { + // The `ord(substr($encoded, $index++))` statement returns the ASCII + // code for the character at $index. Subtract 63 to get the original + // value. (63 was added to ensure proper ASCII characters are displayed + // in the encoded polyline string, which is `human` readable) + $b = ord(substr($encoded, $index++)) - 63; + // AND the bits of the byte with 0x1f to get the original 5-bit `chunk. + // Then left shift the bits by the required amount, which increases + // by 5 bits each time. + // OR the value into $results, which sums up the individual 5-bit chunks + // into the original value. Since the 5-bit chunks were reversed in + // order during encoding, reading them in this way ensures proper + // summation. + $result|= ($b & 0x1f) << $shift; + $shift+= 5; + } + // Continue while the read byte is >= 0x20 since the last `chunk` + // was not OR'd with 0x20 during the conversion process. (Signals the end) + while ($b >= 0x20); + // Check if negative, and convert. (All negative values have the last bit + // set) + $dlat = (($result & 1) ? ~($result >> 1) : ($result >> 1)); + // Compute actual latitude since value is offset from previous value. + $lat+= $dlat; + // The next values will correspond to the longitude for this point. + $shift = 0; + $result = 0; + do { + $b = ord(substr($encoded, $index++)) - 63; + $result|= ($b & 0x1f) << $shift; + $shift+= 5; + } while ($b >= 0x20); + $dlng = (($result & 1) ? ~($result >> 1) : ($result >> 1)); + $lng+= $dlng; + // The actual latitude and longitude values were multiplied by + // 1e5 before encoding so that they could be converted to a 32-bit + // integer representation. (With a decimal accuracy of 5 places) + // Convert back to original values. + $points[] = array( + $lat * 1e-5, + $lng * 1e-5 + ); + } + return $points; +} +function geocode($query, $giveOptions) +{ + global $cloudmadeAPIkey; + $url = "http://geocoding.cloudmade.com/$cloudmadeAPIkey/geocoding/v2/find.js?query=" . urlencode($query) . "&bbox=-35.5,149.00,-35.15,149.1930&return_location=true&bbox_only=true"; + $contents = json_decode(getPage($url)); + if ($giveOptions) return $contents->features; + elseif (isset($contents->features[0]->centroid)) return $contents->features[0]->centroid->coordinates[0] . "," . $contents->features[0]->centroid->coordinates[1]; + else return ""; +} +function reverseGeocode($lat, $lng) +{ + global $cloudmadeAPIkey; + $url = "http://geocoding.cloudmade.com/$cloudmadeAPIkey/geocoding/v2/find.js?around=" . $lat . "," . $lng . "&distance=closest&object_type=road"; + $contents = json_decode(getPage($url)); + return $contents->features[0]->properties->name; +} +?>