<?php | <?php |
include ('include/common.inc.php'); | include ('include/common.inc.php'); |
include_header("About", "about") | include_header("About", "about") |
?> | ?> |
<p> | <p> |
Busness Time - An ACT bus timetable webapp<br /> | Busness Time - An ACT bus timetable webapp<br /> |
Based on the maxious-canberra-transit-feed (<a | Based on the maxious-canberra-transit-feed (<a |
href="http://s3-ap-southeast-1.amazonaws.com/busresources/cbrfeed.zip">download</a>, | href="http://s3-ap-southeast-1.amazonaws.com/busresources/cbrfeed.zip">download</a>, |
last updated <?php | last updated <?php |
echo date("F d Y.", @filemtime('cbrfeed.zip')); ?>)<br /> | echo date("F d Y.", @filemtime('cbrfeed.zip')); ?>)<br /> |
Source code for the <a | Source code for the <a |
href="https://github.com/maxious/ACTBus-data">transit | href="https://github.com/maxious/ACTBus-data">transit |
feed</a> and <a href="https://github.com/maxious/ACTBus-ui">this | feed</a> and <a href="https://github.com/maxious/ACTBus-ui">this |
site</a> available from github.<br /> | site</a> available from github.<br /> |
Uses jQuery Mobile, PHP, PostgreSQL, OpenTripPlanner, OpenLayers, OpenStreetMap, Cloudmade Geocoder and Tile Service<br /> | Uses jQuery Mobile, PHP, PostgreSQL, OpenTripPlanner, OpenLayers, OpenStreetMap, Cloudmade Geocoder and Tile Service<br /> |
<br /> | <br /> |
Feedback encouraged; contact maxious@lambdacomplex.org<br /> | Feedback encouraged; contact maxious@lambdacomplex.org<br /> |
<br /> | <br /> |
Some icons by Joseph Wain / glyphish.com<br /> | Some icons by Joseph Wain / glyphish.com<br /> |
<br /> | <br /> |
<small>Disclaimer: The content of this website is of a general and informative nature. Please check with printed timetables or those available on http://action.act.gov.au before your trip. | <small>Disclaimer: The content of this website is of a general and informative nature. Please check with printed timetables or those available on http://action.act.gov.au before your trip. |
Whilst every effort has been made to ensure the high quality and accuracy of the Site, the Author makes no warranty, | Whilst every effort has been made to ensure the high quality and accuracy of the Site, the Author makes no warranty, |
express or implied concerning the topicality, correctness, completeness or quality of the information, which is provided | express or implied concerning the topicality, correctness, completeness or quality of the information, which is provided |
"as is". The Author expressly disclaims all warranties, including but not limited to warranties of fitness for a particular purpose and warranties of merchantability. | "as is". The Author expressly disclaims all warranties, including but not limited to warranties of fitness for a particular purpose and warranties of merchantability. |
All offers are not binding and without obligation. The Author expressly reserves the right, in his discretion, to suspend, | All offers are not binding and without obligation. The Author expressly reserves the right, in his discretion, to suspend, |
change, modify, add or remove portions of the Site and to restrict or terminate the use and accessibility of the Site | change, modify, add or remove portions of the Site and to restrict or terminate the use and accessibility of the Site |
without prior notice. </small> | without prior notice. </small> |
<? | <?php |
include_footer(); | include_footer(); |
?> | ?> |
#!/bin/bash | #!/bin/bash |
#this script should be run from a fresh git checkout from github | #this script should be run from a fresh git checkout from github |
#ami base must have yum install lighttpd-fastcgi, git, tomcat6 | #ami base must have yum install lighttpd-fastcgi, git, tomcat6 |
#php-cli php-gd tomcat6-webapps tomcat6-admin-webapps svn maven2 | #php-cli php-gd tomcat6-webapps tomcat6-admin-webapps svn maven2 |
#postgres postgres-server php-pg | #postgres postgres-server php-pg |
#http://www.how2forge.org/installing-lighttpd-with-php5-and-mysql-support-on-fedora-12 | #http://www.how2forge.org/installing-lighttpd-with-php5-and-mysql-support-on-fedora-12 |
cp /root/aws.php /tmp/ | cp /root/aws.php /tmp/ |
mkdir /var/www/lib/staticmaplite/cache | mkdir /var/www/lib/staticmaplite/cache |
chcon -h system_u:object_r:httpd_sys_content_t /var/www | chcon -h system_u:object_r:httpd_sys_content_t /var/www |
chcon -R -h root:object_r:httpd_sys_content_t /var/www/* | chcon -R -h root:object_r:httpd_sys_content_t /var/www/* |
chcon -R -t httpd_sys_content_rw_t /var/www/lib/staticmaplite/cache | chcon -R -t httpd_sys_content_rw_t /var/www/lib/staticmaplite/cache |
chmod -R 777 /var/www/lib/staticmaplite/cache | chmod -R 777 /var/www/lib/staticmaplite/cache |
chcon -R -t httpd_sys_content_rw_t /var/www/labs/tiles | |
chmod -R 777 /var/www/labs/tiles | |
wget http://s3-ap-southeast-1.amazonaws.com/busresources/cbrfeed.zip \ | wget http://s3-ap-southeast-1.amazonaws.com/busresources/cbrfeed.zip \ |
-O /var/www/cbrfeed.zip | -O /var/www/cbrfeed.zip |
createdb transitdata | createdb transitdata |
createlang -d transitdata plpgsql | createlang -d transitdata plpgsql |
psql -d transitdata -f /var/www/lib/postgis.sql | psql -d transitdata -f /var/www/lib/postgis.sql |
# curl https://github.com/maxious/ACTBus-ui/raw/master/transitdata.cbrfeed.sql.gz -o transitdata.cbrfeed.sql.gz | # curl https://github.com/maxious/ACTBus-ui/raw/master/transitdata.cbrfeed.sql.gz -o transitdata.cbrfeed.sql.gz |
#made with pg_dump transitdata | gzip -c > transitdata.cbrfeed.sql.gz | #made with pg_dump transitdata | gzip -c > transitdata.cbrfeed.sql.gz |
gunzip /var/www/transitdata.cbrfeed.sql.gz | gunzip /var/www/transitdata.cbrfeed.sql.gz |
psql -d transitdata -f /var/www/transitdata.cbrfeed.sql | psql -d transitdata -f /var/www/transitdata.cbrfeed.sql |
#createuser transitdata -SDRP | #createuser transitdata -SDRP |
#password transitdata | #password transitdata |
#psql -d transitdata -c \"GRANT SELECT ON TABLE agency,calendar,calendar_dates,routes,stop_times,stops,trips TO transitdata;\" | #psql -d transitdata -c \"GRANT SELECT ON TABLE agency,calendar,calendar_dates,routes,stop_times,stops,trips TO transitdata;\" |
php /var/www/updatedb.php | php /var/www/updatedb.php |
wget http://s3-ap-southeast-1.amazonaws.com/busresources/Graph.obj \ | wget http://s3-ap-southeast-1.amazonaws.com/busresources/Graph.obj \ |
-O /tmp/Graph.obj | -O /tmp/Graph.obj |
rm -rfv /usr/share/tomcat6/webapps/opentripplanner* | rm -rfv /usr/share/tomcat6/webapps/opentripplanner* |
wget http://s3-ap-southeast-1.amazonaws.com/busresources/opentripplanner-webapp.war \ | wget http://s3-ap-southeast-1.amazonaws.com/busresources/opentripplanner-webapp.war \ |
-O /usr/share/tomcat6/webapps/opentripplanner-webapp.war | -O /usr/share/tomcat6/webapps/opentripplanner-webapp.war |
wget http://s3-ap-southeast-1.amazonaws.com/busresources/opentripplanner-api-webapp.war \ | wget http://s3-ap-southeast-1.amazonaws.com/busresources/opentripplanner-api-webapp.war \ |
-O /usr/share/tomcat6/webapps/opentripplanner-api-webapp.war | -O /usr/share/tomcat6/webapps/opentripplanner-api-webapp.war |
/etc/init.d/tomcat6 restart | /etc/init.d/tomcat6 restart |
<?php | <?php |
include ("include/common.inc.php"); | include ("include/common.inc.php"); |
include_header("Feedback", "feedback"); | include_header("Feedback", "feedback"); |
function sendEmail($topic, $message) | function sendEmail($topic, $message) |
{ | { |
$address = "maxious@lambdacomplex.org"; | $address = "maxious@lambdacomplex.org"; |
if (file_exists("/tmp/aws.php")) { | if (file_exists("/tmp/aws.php")) { |
include_once ("lib/ses.php"); | include_once ("lib/ses.php"); |
include_once ("/tmp/aws.php"); | include_once ("/tmp/aws.php"); |
$con = new SimpleEmailService($accessKey, $secretKey); | $con = new SimpleEmailService($accessKey, $secretKey); |
//$con->verifyEmailAddress($address); | //$con->verifyEmailAddress($address); |
//$con->listVerifiedEmailAddresses(); | //$con->listVerifiedEmailAddresses(); |
$m = new SimpleEmailServiceMessage(); | $m = new SimpleEmailServiceMessage(); |
$m->addTo($address); | $m->addTo($address); |
$m->setFrom($address); | $m->setFrom($address); |
$m->setSubject($topic); | $m->setSubject($topic); |
$m->setMessageFromString($message); | $m->setMessageFromString($message); |
$con->sendEmail($m); | $con->sendEmail($m); |
} | } |
else { | else { |
// In case any of our lines are larger than 70 characters, we should use wordwrap() | // In case any of our lines are larger than 70 characters, we should use wordwrap() |
$message = wordwrap($message, 70); | $message = wordwrap($message, 70); |
// Send | // Send |
mail($address, $topic, $message); | mail($address, $topic, $message); |
} | } |
} | } |
if (isset($_REQUEST['feedback']) || isset($_REQUEST['newlocation'])){ | if (isset($_REQUEST['feedback']) || isset($_REQUEST['newlocation'])){ |
sendEmail("bus.lambda feedback",print_r($_REQUEST,true)); | sendEmail("bus.lambda feedback",print_r($_REQUEST,true)); |
echo "<center><h2>Thank you for your feedback!</h2></center>"; | echo "<h2 style='text-align: center;'>Thank you for your feedback!</h2>"; |
} else { | } else { |
$stopid = ""; | $stopid = ""; |
$stopcode = ""; | $stopcode = ""; |
$urlparts = explode("?",$_SERVER["HTTP_REFERER"]); | $urlparts = explode("?",$_SERVER["HTTP_REFERER"]); |
if (isset($urlparts[1])) { | if (isset($urlparts[1])) { |
$getparams = explode("&",$urlparts[1]); | $getparams = explode("&",$urlparts[1]); |
foreach ($getparams as $param) { | foreach ($getparams as $param) { |
$paramparts=explode("=",$param); | $paramparts=explode("=",$param); |
if ($paramparts[0] == "stopid") $stopid = $paramparts[1]; | if ($paramparts[0] == "stopid") $stopid = $paramparts[1]; |
if ($paramparts[0] == "stopcode") $stopcode = $paramparts[1]; | if ($paramparts[0] == "stopcode") $stopcode = $paramparts[1]; |
} | } |
} | } |
?> | ?> |
<h3>Add/Move/Delete a Bus Stop Location</h3> | <h3>Add/Move/Delete a Bus Stop Location</h3> |
<form action="feedback.php" method="post"> | <form action="feedback.php" method="post"> |
StopID: <input type="text" name="stopid" value="<?php echo $stopid ?>"/><br> | StopID: <input type="text" name="stopid" value="<?php echo $stopid ?>"/><br> |
or StopCode: <input type="text" name="stopcode" value="<?php echo $stopcode ?>"/><br> | or StopCode: <input type="text" name="stopcode" value="<?php echo $stopcode ?>"/><br> |
<small> if you click on feedback from a stop page, these will get filled in automatically. else describe the location/street of the stop in one of these boxes </small><br> | <small> if you click on feedback from a stop page, these will get filled in automatically. else describe the location/street of the stop in one of these boxes </small><br> |
Suggested Stop Location (lat/long or words): <input type="text" name="newlocation"/><br> | Suggested Stop Location (lat/long or words): <input type="text" name="newlocation"/><br> |
<!--<small> if your device supports javascript, you can pick a location from the map above</small><br>--> | <!--<small> if your device supports javascript, you can pick a location from the map above</small><br>--> |
<input type="submit" value="Submit!"/> | <input type="submit" value="Submit!"/> |
</form> | </form> |
<h3>Bug Report/Feedback</h3> | <h3>Bug Report/Feedback</h3> |
Please leave feedback about bugs/errors or general suggestions about improvements that could be made to the way the data is presented! | Please leave feedback about bugs/errors or general suggestions about improvements that could be made to the way the data is presented! |
<form action="feedback.php" method="post"> | <form action="feedback.php" method="post"> |
<textarea name="feedback"> | <textarea name="feedback"> |
</textarea> | </textarea> |
<textarea name="extrainfo" id="extrainfo"> | <textarea name="extrainfo" id="extrainfo"> |
<?php | <?php |
echo "Referrer URL: ".$_SERVER["HTTP_REFERER"]; | echo "Referrer URL: ".$_SERVER["HTTP_REFERER"]; |
echo "\nCurrent page URL: ".curPageURL(); | echo "\nCurrent page URL: ".curPageURL(); |
echo "\nUser Agent: ".$_SERVER["HTTP_USER_AGENT"]; | echo "\nUser Agent: ".$_SERVER["HTTP_USER_AGENT"]; |
echo "\nUser host/IP: ".$_SERVER["HTTP_X_FORWARDED_FOR"]." ".$_SERVER["REMOTE_ADDR"]; | echo "\nUser host/IP: ".$_SERVER["HTTP_X_FORWARDED_FOR"]." ".$_SERVER["REMOTE_ADDR"]; |
echo "\nServer host/IP: ".php_uname("n"); | echo "\nServer host/IP: ".php_uname("n"); |
echo "\nCurrent date/time: ". date("c"); | echo "\nCurrent date/time: ". date("c"); |
echo "\nCurrent code revision: ".exec("git rev-parse --short HEAD"); | echo "\nCurrent code revision: ".exec("git rev-parse --short HEAD"); |
echo "\nCurrent timetables version: ".date("c",@filemtime('cbrfeed.zip')); | echo "\nCurrent timetables version: ".date("c",@filemtime('cbrfeed.zip')); |
echo "\nDump of session: ".print_r($_SESSION,true); | echo "\nDump of session: ".print_r($_SESSION,true); |
?> | ?> |
</textarea> | </textarea> |
<input type="submit" value="Submit!"/> | <input type="submit" value="Submit!"/> |
</form> | </form> |
<?php | <?php |
} | } |
include_footer(); | include_footer(); |
?> | ?> |
<?php | <?php |
// SELECT array_to_string(array(SELECT REPLACE(name_2006, ',', '\,') as name FROM suburbs order by name), ',') | // SELECT array_to_string(array(SELECT REPLACE(name_2006, ',', '\,') as name FROM suburbs order by name), ',') |
$suburbs = explode(",", "Acton,Ainslie,Amaroo,Aranda,Banks,Barton,Belconnen,Bonner,Bonython,Braddon,Bruce,Calwell,Campbell,Chapman,Charnwood,Chifley,Chisholm,City,Conder,Cook,Curtin,Deakin,Dickson,Downer,Duffy,Dunlop,Evatt,Fadden,Farrer,Fisher,Florey,Flynn,Forrest,Franklin,Fraser,Fyshwick,Garran,Gilmore,Giralang,Gordon,Gowrie,Greenway,Griffith,Gungahlin,Hackett,Hall,Harrison,Hawker,Higgins,Holder,Holt,Hughes,Hume,Isaacs,Isabella Plains,Kaleen,Kambah,Kingston,Latham,Lawson,Lyneham,Lyons,Macarthur,Macgregor,Macquarie,Mawson,McKellar,Melba,Mitchell,Monash,Narrabundah,Ngunnawal,Nicholls,Oaks Estate,O'Connor,O'Malley,Oxley,Page,Palmerston,Parkes,Pearce,Phillip,Pialligo,Red Hill,Reid,Richardson,Rivett,Russell,Scullin,Spence,Stirling,Symonston,Tharwa,Theodore,Torrens,Turner,Wanniassa,Waramanga,Watson,Weetangera,Weston,Yarralumla"); | $suburbs = explode(",", "Acton,Ainslie,Amaroo,Aranda,Banks,Barton,Belconnen,Bonner,Bonython,Braddon,Bruce,Calwell,Campbell,Chapman,Charnwood,Chifley,Chisholm,City,Conder,Cook,Curtin,Deakin,Dickson,Downer,Duffy,Dunlop,Evatt,Fadden,Farrer,Fisher,Florey,Flynn,Forrest,Franklin,Fraser,Fyshwick,Garran,Gilmore,Giralang,Gordon,Gowrie,Greenway,Griffith,Gungahlin,Hackett,Hall,Harrison,Hawker,Higgins,Holder,Holt,Hughes,Hume,Isaacs,Isabella Plains,Kaleen,Kambah,Kingston,Latham,Lawson,Lyneham,Lyons,Macarthur,Macgregor,Macquarie,Mawson,McKellar,Melba,Mitchell,Monash,Narrabundah,Ngunnawal,Nicholls,Oaks Estate,O'Connor,O'Malley,Oxley,Page,Palmerston,Parkes,Pearce,Phillip,Pialligo,Red Hill,Reid,Richardson,Rivett,Russell,Scullin,Spence,Stirling,Symonston,Tharwa,Theodore,Torrens,Turner,Wanniassa,Waramanga,Watson,Weetangera,Weston,Yarralumla"); |
function staticmap($mapPoints, $zoom = 0, $markerImage = "iconb", $collapsible = true) | function staticmap($mapPoints, $zoom = 0, $markerImage = "iconb", $collapsible = true) |
{ | { |
$width = 300; | $width = 300; |
$height = 300; | $height = 300; |
$metersperpixel[9] = 305.492 * $width; | $metersperpixel[9] = 305.492 * $width; |
$metersperpixel[10] = 152.746 * $width; | $metersperpixel[10] = 152.746 * $width; |
$metersperpixel[11] = 76.373 * $width; | $metersperpixel[11] = 76.373 * $width; |
$metersperpixel[12] = 38.187 * $width; | $metersperpixel[12] = 38.187 * $width; |
$metersperpixel[13] = 19.093 * $width; | $metersperpixel[13] = 19.093 * $width; |
$metersperpixel[14] = 9.547 * $width; | $metersperpixel[14] = 9.547 * $width; |
$metersperpixel[15] = 4.773 * $width; | $metersperpixel[15] = 4.773 * $width; |
$metersperpixel[16] = 2.387 * $width; | $metersperpixel[16] = 2.387 * $width; |
// $metersperpixel[17]=1.193*$width; | // $metersperpixel[17]=1.193*$width; |
$center = ""; | $center = ""; |
$markers = ""; | $markers = ""; |
$minlat = 999; | $minlat = 999; |
$minlon = 999; | $minlon = 999; |
$maxlat = 0; | $maxlat = 0; |
$maxlon = 0; | $maxlon = 0; |
if (sizeof($mapPoints) < 1) return "map error"; | if (sizeof($mapPoints) < 1) return "map error"; |
if (sizeof($mapPoints) === 1) { | if (sizeof($mapPoints) === 1) { |
if ($zoom == 0) $zoom = 14; | if ($zoom == 0) $zoom = 14; |
$markers.= "{$mapPoints[0][0]},{$mapPoints[0][1]},$markerimage"; | $markers.= "{$mapPoints[0][0]},{$mapPoints[0][1]},$markerimage"; |
$center = "{$mapPoints[0][0]},{$mapPoints[0][1]}"; | $center = "{$mapPoints[0][0]},{$mapPoints[0][1]}"; |
} | } |
else { | else { |
foreach ($mapPoints as $index => $mapPoint) { | foreach ($mapPoints as $index => $mapPoint) { |
$markers.= $mapPoint[0] . "," . $mapPoint[1] . "," . $markerImage . ($index + 1); | $markers.= $mapPoint[0] . "," . $mapPoint[1] . "," . $markerImage . ($index + 1); |
if ($index + 1 != sizeof($mapPoints)) $markers.= "|"; | if ($index + 1 != sizeof($mapPoints)) $markers.= "|"; |
if ($mapPoint[0] < $minlat) $minlat = $mapPoint[0]; | if ($mapPoint[0] < $minlat) $minlat = $mapPoint[0]; |
if ($mapPoint[0] > $maxlat) $maxlat = $mapPoint[0]; | if ($mapPoint[0] > $maxlat) $maxlat = $mapPoint[0]; |
if ($mapPoint[1] < $minlon) $minlon = $mapPoint[1]; | if ($mapPoint[1] < $minlon) $minlon = $mapPoint[1]; |
if ($mapPoint[1] > $maxlon) $maxlon = $mapPoint[1]; | if ($mapPoint[1] > $maxlon) $maxlon = $mapPoint[1]; |
$totalLat+= $mapPoint[0]; | $totalLat+= $mapPoint[0]; |
$totalLon+= $mapPoint[1]; | $totalLon+= $mapPoint[1]; |
} | } |
if ($zoom == 0) { | if ($zoom == 0) { |
$mapwidthinmeters = distance($minlat, $minlon, $minlat, $maxlon); | $mapwidthinmeters = distance($minlat, $minlon, $minlat, $maxlon); |
foreach (array_reverse($metersperpixel, true) as $zoomLevel => $maxdistance) { | foreach (array_reverse($metersperpixel, true) as $zoomLevel => $maxdistance) { |
if ($zoom == 0 && $mapwidthinmeters < ($maxdistance + 50)) $zoom = $zoomLevel; | if ($zoom == 0 && $mapwidthinmeters < ($maxdistance + 50)) $zoom = $zoomLevel; |
} | } |
} | } |
$center = $totalLat / sizeof($mapPoints) . "," . $totalLon / sizeof($mapPoints); | $center = $totalLat / sizeof($mapPoints) . "," . $totalLon / sizeof($mapPoints); |
} | } |
$output = ""; | $output = ""; |
if ($collapsible) $output.= '<div data-role="collapsible" data-collapsed="true"><h3>Open Map...</h3>'; | if ($collapsible) $output.= '<div class="map" data-role="collapsible" data-collapsed="true"><h3>Open Map...</h3>'; |
$output.= '<center><img src="' . curPageURL() . '/lib/staticmaplite/staticmap.php?center=' . $center . '&zoom=' . $zoom . '&size=' . $width . 'x' . $height . '&markers=' . | $output.= '<img class="map" src="' . curPageURL() . '/lib/staticmaplite/staticmap.php?center=' . $center . '&zoom=' . $zoom . '&size=' . $width . 'x' . $height . '&markers=' . |
$markers . '" width=' . $width . ' height=' . $height . '></center>'; | $markers . '" width=' . $width . ' height=' . $height . '>'; |
if ($collapsible) $output.= '</div>'; | if ($collapsible) $output.= '</div>'; |
return $output; | return $output; |
} | } |
function distance($lat1, $lng1, $lat2, $lng2, $roundLargeValues = false) | function distance($lat1, $lng1, $lat2, $lng2, $roundLargeValues = false) |
{ | { |
$pi80 = M_PI / 180; | $pi80 = M_PI / 180; |
$lat1*= $pi80; | $lat1*= $pi80; |
$lng1*= $pi80; | $lng1*= $pi80; |
$lat2*= $pi80; | $lat2*= $pi80; |
$lng2*= $pi80; | $lng2*= $pi80; |
$r = 6372.797; // mean radius of Earth in km | $r = 6372.797; // mean radius of Earth in km |
$dlat = $lat2 - $lat1; | $dlat = $lat2 - $lat1; |
$dlng = $lng2 - $lng1; | $dlng = $lng2 - $lng1; |
$a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2); | $a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2); |
$c = 2 * atan2(sqrt($a) , sqrt(1 - $a)); | $c = 2 * atan2(sqrt($a) , sqrt(1 - $a)); |
$km = $r * $c; | $km = $r * $c; |
if ($roundLargeValues) { | if ($roundLargeValues) { |
if ($km < 1) return floor($km * 1000); | if ($km < 1) return floor($km * 1000); |
else return round($km,2)."k"; | else return round($km,2)."k"; |
} else return floor($km * 1000); | } else return floor($km * 1000); |
} | } |
function decodePolylineToArray($encoded) | function decodePolylineToArray($encoded) |
{ | { |
// source: http://latlongeeks.com/forum/viewtopic.php?f=4&t=5 | // source: http://latlongeeks.com/forum/viewtopic.php?f=4&t=5 |
$length = strlen($encoded); | $length = strlen($encoded); |
$index = 0; | $index = 0; |
$points = array(); | $points = array(); |
$lat = 0; | $lat = 0; |
$lng = 0; | $lng = 0; |
while ($index < $length) { | while ($index < $length) { |
// Temporary variable to hold each ASCII byte. | // Temporary variable to hold each ASCII byte. |
$b = 0; | $b = 0; |
// The encoded polyline consists of a latitude value followed by a | // The encoded polyline consists of a latitude value followed by a |
// longitude value. They should always come in pairs. Read the | // longitude value. They should always come in pairs. Read the |
// latitude value first. | // latitude value first. |
$shift = 0; | $shift = 0; |
$result = 0; | $result = 0; |
do { | do { |
// The `ord(substr($encoded, $index++))` statement returns the ASCII | // The `ord(substr($encoded, $index++))` statement returns the ASCII |
// code for the character at $index. Subtract 63 to get the original | // code for the character at $index. Subtract 63 to get the original |
// value. (63 was added to ensure proper ASCII characters are displayed | // value. (63 was added to ensure proper ASCII characters are displayed |
// in the encoded polyline string, which is `human` readable) | // in the encoded polyline string, which is `human` readable) |
$b = ord(substr($encoded, $index++)) - 63; | $b = ord(substr($encoded, $index++)) - 63; |
// AND the bits of the byte with 0x1f to get the original 5-bit `chunk. | // 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 | // Then left shift the bits by the required amount, which increases |
// by 5 bits each time. | // by 5 bits each time. |
// OR the value into $results, which sums up the individual 5-bit chunks | // 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 | // into the original value. Since the 5-bit chunks were reversed in |
// order during encoding, reading them in this way ensures proper | // order during encoding, reading them in this way ensures proper |
// summation. | // summation. |
$result|= ($b & 0x1f) << $shift; | $result|= ($b & 0x1f) << $shift; |
$shift+= 5; | $shift+= 5; |
} | } |
// Continue while the read byte is >= 0x20 since the last `chunk` | // Continue while the read byte is >= 0x20 since the last `chunk` |
// was not OR'd with 0x20 during the conversion process. (Signals the end) | // was not OR'd with 0x20 during the conversion process. (Signals the end) |
while ($b >= 0x20); | while ($b >= 0x20); |
// Check if negative, and convert. (All negative values have the last bit | // Check if negative, and convert. (All negative values have the last bit |
// set) | // set) |
$dlat = (($result & 1) ? ~($result >> 1) : ($result >> 1)); | $dlat = (($result & 1) ? ~($result >> 1) : ($result >> 1)); |
// Compute actual latitude since value is offset from previous value. | // Compute actual latitude since value is offset from previous value. |
$lat+= $dlat; | $lat+= $dlat; |
// The next values will correspond to the longitude for this point. | // The next values will correspond to the longitude for this point. |
$shift = 0; | $shift = 0; |
$result = 0; | $result = 0; |
do { | do { |
$b = ord(substr($encoded, $index++)) - 63; | $b = ord(substr($encoded, $index++)) - 63; |
$result|= ($b & 0x1f) << $shift; | $result|= ($b & 0x1f) << $shift; |
$shift+= 5; | $shift+= 5; |
} while ($b >= 0x20); | } while ($b >= 0x20); |
$dlng = (($result & 1) ? ~($result >> 1) : ($result >> 1)); | $dlng = (($result & 1) ? ~($result >> 1) : ($result >> 1)); |
$lng+= $dlng; | $lng+= $dlng; |