MediaWiki GIS Extensions

GISWiki - Das freie Portal für Geoinformatik (GIS)
Version vom 12. Juli 2005, 19:08 Uhr von HeinzJ (Diskussion | Beiträge) (Koordinatentool "hjl_get_Coor")

Wechseln zu: Navigation, Suche


Google Maps Extensions

Google Maps ist der Karten- und Routing-Servive von Goggle.

Infofenster-Extension

Code


<?php

# Google Map WikiMedia extension
# Copy this text into a file called "hjlGoogleMap.php"
# To activate the extension, include it from your LocalSettings.php
# with: include("extensions/hjlGoogleMap.php"); 
#
# Use the tags <GoogleMap>Latitude|Longitude|ZoomFactor|InfoText<GoogleMap> to display this map.
#
# Sample: "<GoogleMap>53.053|7.803|10|GISWiki got a GoogleMap</GoogleMap>"
#
# Missing: error-handling, ....

function wfGoogleMapExtension() 
{
	global $wgParser;
	$wgParser->setHook( "GoogleMap", "renderGoogleMap" );
}

# The callback function for converting the input text to HTML output
function renderGoogleMap( $input ) 
{

$varAr = explode("|", $input);

$varLat	=  $varAr[0];
$varLon	=  $varAr[1];
$varZoom=  $varAr[2];
$varInfo = $varAr[3];

# Hint: you need to sign up for a Google Maps API key!!
#       http://www.google.com/apis/maps/signup.html
#       Then replace the key below.

$aMap = 
"
<script src='http://maps.google.com/maps?file=api&v=1&key=ABQIAAAAtThFd25f3RSm_Uyo-qMHZhSEt_GnVgvWmIxz4pFM1BN9jZGypxTTPP-dRrFjQMULBxRQCp9iRU2O2w' type='text/javascript'></script>
<div id='map' style='width: 500px; height: 400px'></div>
<script type='text/javascript'>
//<![CDATA[
var map = new GMap(document.getElementById('map'));
//map.addControl(new GSmallMapControl());
//map.addControl(new GMapTypeControl());
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
map.centerAndZoom(new GPoint(".$varLat.", ".$varLon."), ".$varZoom.");
map.setMapType(_SATELLITE_TYPE);
map.openInfoWindow(map.getCenterLatLng(),
document.createTextNode('".$varInfo."'));
</script>
";

return $aMap;
}
?>


Beispiel

Eingabe

<GoogleMap>53.0419921875|8.85000228881836|10|GISWiki got a GoogleMap</GoogleMap>

Ergebnis

<GoogleMap>53.0419921875|8.85000228881836|10|GISWiki got a GoogleMap</GoogleMap>

Marker Extension

Code


<?php

# Google Map WikiMedia extension
#
# Copy this text into a file called "hjlGoogleMapMarker.php"
# To activate the extension, include it from your LocalSettings.php
# with: include("extensions/hjlGoogleMap.php"); 
#
# Use the tags <GoogleMapM>Latitude|Longitude|ZoomFactor|URL|URL-Text|URL-Image|Image-Height<GoogleMapM> to display this map.
#
# Sample: "<GoogleMapM>53.053|7.803|10|http://www.giswiki.org/|GISWiki|http://www.giswiki.org/skins/common/images/wiki.png\|30</GoogleMapM>"
#
# Missing: error-handling, ....


$wgExtensionFunctions[] = "wfGoogleMapMarkerExtension";

function wfGoogleMapMarkerExtension() 
{
	global $wgParser;
	$wgParser->setHook( "GoogleMapM", "renderGoogleMapMarker" );
}

# The callback function for converting the input text to HTML output
function renderGoogleMapMarker( $input ) 
{

$varAr = explode("|", $input);

$varLat	  = $varAr[0];
$varLon	  = $varAr[1];
$varZoom  = $varAr[2];
$varURL   = $varAr[3];
$varText  = $varAr[4];
$varImg   = $varAr[5];
$varImgH  = $varAr[6];

# Hint: you need to sign up for a Google Maps API key!!
#       http://www.google.com/apis/maps/signup.html
#       Then replace the key below.

$varInfo = "<img src=\"".$varImg."\" height=\"".$varImgH."\" width=\"".$varImgW."\"><br><a href=\"".$varURL."\" target=\"_blank\">".$varText."</a>";

$aMap = 
"

<script>
// Creates a marker whose info window displays the given number
function createMarker(point, text) {
var marker = new GMarker(point);
var html = text + \"<br><br><font size='-1'>(öffnet in neuem Fenster)</font>\";
GEvent.addListener(marker, \"click\", function() {marker.openInfoWindowHtml(html);});
return marker;
}
</script>

<script src='http://maps.google.com/maps?file=api&v=1&key=ABQIAAAAtThFd25f3RSm_Uyo-qMHZhSEt_GnVgvWmIxz4pFM1BN9jZGypxTTPP-dRrFjQMULBxRQCp9iRU2O2w' type='text/javascript'></script>
<div id='map' style='width: 500px; height: 400px'></div>
<script type='text/javascript'>
//<![CDATA[
var map = new GMap(document.getElementById('map'));
//map.addControl(new GSmallMapControl());
//map.addControl(new GMapTypeControl());
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
map.centerAndZoom(new GPoint(".$varLat.", ".$varLon."), ".$varZoom.");
map.setMapType(_SATELLITE_TYPE);
var point = new GPoint(".$varLat.",".$varLon.");
var marker = createMarker(point, '".$varInfo."');
map.addOverlay(marker);
</script>
";

return $aMap;
}
?>



Beispiel

Eingabe

<GoogleMapM>53.0419921875|8.85000228881836|10|http://www.giswiki.org/|GISWiki|http://www.giswiki.org/skins/common/images/wiki.png\|30</GoogleMapM>

Ergebnis

<GoogleMapM>53.0419921875|8.85000228881836|10|http://www.giswiki.org/%7CGISWiki%7Chttp://www.giswiki.org/skins/common/images/wiki.png\%7C30</GoogleMapM>

Weblinks

Siehe auch

  • There's also a pointer to http://mygmaps.com , which allows you to display custom data files with Google Maps. (The site is alphaish, so things may break.)

GIS-Extension

Die GIS-Erweiterung auf der MediaWiki-Seite wurde erweitert.

Die Tabelle GIS wurde um zwei Felder erweitert. In folgender SQL-Anweisung sind die Änderungen fett hervorgehoben. Hinzu kam ein Feld gis_title für die Aufnahme alternativer/zusätzlicher Texte sowie das Feld gis_url um auf weitere Weblinks verweisen zu können als nur die aktuell verwendete Artikelseite.

Tabelle

CREATE TABLE /*$wgDBprefix*/gis (
  gis_page int(8) unsigned NOT NULL,
  gis_title varchar(255) binary default NULL,
  gis_url varchar(255) binary default NULL,
  gis_latitude_min real NOT NULL,
  gis_latitude_max real NOT NULL,
  gis_longitude_min real NOT NULL,
  gis_longitude_max real NOT NULL,
  gis_globe char(8) binary NOT NULL default ,
  gis_type char(12) binary,
  gis_type_arg real NOT NULL default 0,
  
  KEY gis_page (gis_page),
  INDEX gis_globe (gis_globe),
  INDEX gis_type (gis_type),
  INDEX gis_type_arg (gis_type_arg)
);

Dateien/Funktionen

Folgende Dateien/Funktionen der GIS-Erweiterung wurden diesbezüglich angepasst.

  • database.php
  • geo.php

Hier die Änderungen in den Funktionen. Änderungen sind fett gekennzeichnet.

database.php - function article_save_geo

 function article_save_geo ( $article, $user, $text ) 
 {
   $id = $article->getID();
 
   $g = new gis_database();
 
   $g->delete_position( $id );
 
   $tag = 'geo';
   $gis_content = array();
   $text = Parser::extractTags( $tag, $text, $gis_content );
 
   foreach( $gis_content as $marker => $content ) {
 
     $p = new geo_param( $content );
     $attr = $p->get_attr();
 
     //Begin Changes
     //
     //Added code for support of field "gis_title" and "gis_url"
     //see also "database.php"
     //Heinz-Josef Lücking - 7.7.2005
     //
 
     $g->add_position( $id,
            $p->latdeg_min, $p->londeg_min,
            $p->latdeg_max, $p->londeg_max,
            $attr['globe'],
            $attr['type'], $attr['arg:type'], $attr['title'], $attr['url'] );
 
     //End Changes
   }
   return true;
 }

database.php - function add_position

 function add_position( $id, $latmin, $lonmin, 
            $latmax, $lonmax, $globe, $type, $type_arg, $title, $url)
 {

   $fname = 'gis_database::add_position';
   
   //Begin Changes
   //
   //Added code for support of field "gis_title" and "gis_url"
   //see also "database.php"
   //Heinz-Josef Lücking - 7.7.2005
   //
   
   //If no title is set, the pagename is used.
   
   if ($title == "") 
   {
     $aTitle = gis_database::get_title( $id );
   } else {
     $aTitle = $title;
   };
   if (!$globe) $globe = "";

   $type_arg = str_replace( ',', , $type_arg); /* ignore commas */

   $this->db->insert( 'gis',
       array(
         'gis_page'          => $id,
         'gis_title'         => $aTitle,
         'gis_url'           => $url,
         'gis_latitude_min'  => $latmin,
         'gis_longitude_min' => $lonmin,
         'gis_latitude_max'  => $latmax,
         'gis_longitude_max' => $lonmax,
         'gis_globe'         => $globe,
         'gis_type'          => $type,
         'gis_type_arg'      => $type_arg),
       $fname );
   
   //End Changes
 }

geo.php - function geo_param

 function geo_param( $param )
 {
 
   //Begin Changes
   //
   //Added code for support of field "gis_title" and "gis_url"
   //see also "database.php"
   //Heinz-Josef Lücking - 7.7.2005
   //
   $sparam = str_replace( ' title:', '#|title:', $param);
   $sparam = str_replace( ' url:', '#|url:', $sparam);
 
   $arparam = explode("#", $sparam );
 
   for ($i=0; $i<count($arparam); $i++) {
     $var = stristr($arparam[$i],'|');
     if ($var === false) {
       $var = str_replace( '_', ' ', $arparam[$i] );
       $var = str_replace( ' ', '|', $var );
       $arparam[$i] = $var;
     }
   }
   $sparam =implode("",$arparam);
   
   $this->pieces = explode("|", str_replace( '_', ' ', $sparam ));
    
   //End Changes
    
   $this->get_coor( );

   $this->latdeg_min = $this->latdeg_max = $this->latdeg;
   $this->londeg_min = $this->londeg_max = $this->londeg;
   if ($this->pieces[0] == "to") {
     array_shift($this->pieces);
     $this->get_coor();
     if ($this->latdeg < $this->latdeg_max) {
       $this->latdeg_min = $this->latdeg;
     } else {
       $this->latdeg_max = $this->latdeg;
     }
     if ($this->londeg < $this->londeg_max) {
       $this->londeg_min = $this->londeg;
     } else {
       $this->londeg_max = $this->londeg;
     }
     $this->latdeg = ($this->latdeg_max+$this->latdeg_min) / 2;
     $this->londeg = ($this->londeg_max+$this->londeg_min) / 2;
     $this->coor = array();
   }
 }

Koordinatentool "hjl_get_Coor"

Unter Zurhilfenahme der Google Maps wurde ein Tool entwickelt, das die Erstellung von Koordinatenbezügen erleichtert. Die Geokoordinaten werden den Google Maps entnommen. Eingabe- und Auswahlfelder bieten die Möglichkeit weitere Informationen hinzuzufügen.

Näheres siehe hjl_get_Coor.