xref: /plugin/openlayersmap/syntax/olmap.php (revision 44aba0bc9dfb85d095fa821c46f3f70464f9b599)
1<?php
2/*
3 * Copyright (c) 2008-2011 Mark C. Prins <mc.prins@gmail.com>
4*
5* Permission to use, copy, modify, and distribute this software for any
6* purpose with or without fee is hereby granted, provided that the above
7* copyright notice and this permission notice appear in all copies.
8*
9* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16*/
17
18/**
19 * Plugin OL Maps: Allow Display of a OpenLayers Map in a wiki page.
20 *
21 * @author Mark Prins
22 */
23
24if (!defined('DOKU_INC'))
25define('DOKU_INC', realpath(dirname(__FILE__) . '/../../') . '/');
26if (!defined('DOKU_PLUGIN'))
27define('DOKU_PLUGIN', DOKU_INC . 'lib/plugins/');
28require_once (DOKU_PLUGIN . 'syntax.php');
29
30/**
31 * All DokuWiki plugins to extend the parser/rendering mechanism
32 * need to inherit from this class
33 */
34class syntax_plugin_openlayersmap_olmap extends DokuWiki_Syntax_Plugin {
35	/** defaults of the known attributes of the olmap tag. */
36	private $dflt = array (
37		'id'		=> 'olmap',
38		'width'		=> '550px',
39		'height'	=> '450px',
40		'lat'		=> 50.0,
41		'lon'		=> 5.1,
42		'zoom'		=> 12,
43		'toolbar'	=> true,
44		'statusbar'	=> true,
45		'controls'	=> true,
46		'poihoverstyle'	=> false,
47		'baselyr'	=>'OpenStreetMap',
48	 	'gpxfile'	=> '',
49 		'kmlfile'	=> '',
50		'summary'	=>''
51	);
52
53	/**
54	 * Return the type of syntax this plugin defines.
55	 * @Override
56	 */
57	function getType() {
58		return 'substition';
59	}
60
61	/**
62	 * Defines how this syntax is handled regarding paragraphs.
63	 * @Override
64	 */
65	function getPType() {
66		//normal block stack
67		return 'block';
68	}
69
70	/**
71	 * Returns a number used to determine in which order modes are added.
72	 * @Override
73	 */
74	function getSort() {
75		return 901;
76	}
77
78	/**
79	 * This function is inherited from Doku_Parser_Mode.
80	 * Here is the place to register the regular expressions needed
81	 * to match your syntax.
82	 * @Override
83	 */
84	function connectTo($mode) {
85		$this->Lexer->addSpecialPattern('<olmap ?[^>\n]*>.*?</olmap>', $mode, 'plugin_openlayersmap_olmap');
86	}
87
88	/**
89	 * handle each olmap tag. prepare the matched syntax for use in the renderer.
90	 * @Override
91	 */
92	function handle($match, $state, $pos, &$handler) {
93		// break matched cdata into its components
94		list ($str_params, $str_points) = explode('>', substr($match, 7, -9), 2);
95		// get the lat/lon for adding them to the metadata (used by geotag)
96		preg_match('(lat[:|=]\"\d*\.\d*\")',$match,$mainLat);
97		preg_match('(lon[:|=]\"\d*\.\d*\")',$match,$mainLon);
98		$mainLat=substr($mainLat[0],5,-1);
99		$mainLon=substr($mainLon[0],5,-1);
100
101		$gmap = $this->_extract_params($str_params);
102		$overlay = $this->_extract_points($str_points);
103
104		$imgUrl = "{{";
105		// choose maptype based on tag
106		if (stripos($gmap['baselyr'],'google') !== false){
107			// use google
108			$imgUrl .= $this->_getGoogle($gmap, $overlay);
109		} elseif (stripos($gmap['baselyr'],'ve') !== false){
110			// use bing
111			$imgUrl .= $this->_getBing($gmap, $overlay);
112		} elseif (stripos($gmap['baselyr'],'bing') !== false){
113			// use bing
114			$imgUrl .= $this->_getBing($gmap, $overlay);
115		} elseif (stripos($gmap['baselyr'],'mapquest') !== false){
116			// use mapquest
117			$imgUrl .=$this->_getMapQuest($gmap,$overlay);
118		} else {
119			// use http://staticmap.openstreetmap.de "staticMapLite"
120			$imgUrl .=$this->_getStaticOSM($gmap,$overlay);
121		}
122		// TODO implementation for http://ojw.dev.openstreetmap.org/StaticMapDev/
123
124		// append dw specific params
125		$imgUrl .="&.png?".$gmap['width']."x".$gmap['height'];
126		$imgUrl .= "&nolink";
127		$imgUrl .= " |".$gmap['summary']."}} ";
128		// remove 'px'
129		$imgUrl = str_replace("px", "",$imgUrl);
130
131		$imgUrl=p_render("xhtml", p_get_instructions($imgUrl), $info);
132
133		$mapid = $gmap['id'];
134
135		// create a javascript parameter string for the map
136		$param = '';
137		foreach ($gmap as $key => $val) {
138			$param .= is_numeric($val) ? "$key: $val, " : "$key: '" . hsc($val) . "', ";
139		}
140		if (!empty ($param)) {
141			$param = substr($param, 0, -2);
142		}
143		unset ($gmap['id']);
144
145		// create a javascript serialisation of the point data
146		$poi = '';
147		$poitable='';
148		$rowId=0;
149		if (!empty ($overlay)) {
150			foreach ($overlay as $data) {
151				list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
152				$rowId++;
153				$poi .= ", {lat: $lat, lon: $lon, txt: '$text', angle: $angle, opacity: $opacity, img: '$img', rowId: $rowId}";
154				$poitable .='
155			<tr>
156				<td class="rowId">'.$rowId.'</td>
157				<td class="icon"><img src="'.DOKU_BASE.'/lib/plugins/openlayersmap/icons/'.$img.'" alt="icon" /></td>
158				<td class="lat" title="'.$this->getLang('olmapPOIlatTitle').'">'.$lat.'</td>
159				<td class="lon" title="'.$this->getLang('olmapPOIlonTitle').'">'.$lon.'</td>
160				<td class="txt">'.$text.'</td>
161			</tr>';
162			}
163			$poi = substr($poi, 2);
164		}
165		//$js .= "createMap({" . $param . " },[$poi]);";
166		$js .= "[{" . $param . " },[$poi]];";
167		// unescape the json
168		$poitable = stripslashes($poitable);
169
170		return array($mapid,$js,$mainLat,$mainLon,$poitable,$gmap['summary'],$imgUrl);
171	}
172
173	/**
174	 * render html tag/output. render the content.
175	 * @Override
176	 */
177	function render($mode, &$renderer, $data) {
178		static $initialised = false; // set to true after script initialisation
179		static $mapnumber = 0; // incremeted for each map tag in the page source
180		list ($mapid, $param, $mainLat, $mainLon, $poitable, $poitabledesc, $staticImgUrl) = $data;
181
182		if ($mode == 'xhtml') {
183			$olscript = '';
184			$olEnable = false;
185			$gscript = '';
186			$gEnable = $this->getConf('enableGoogle');
187			$vscript = '';
188			$vEnable = false;
189			//$yscript = '';
190			//$yEnable = false;
191			$mqEnable = $this->getConf('enableMapQuest');
192			$osmEnable = $this->getConf('enableOSM');
193			$enableBing = $this->getConf('enableBing');
194
195			$scriptEnable = '';
196
197			if (!$initialised) {
198				$initialised = true;
199				// render necessary script tags
200				if($gEnable){
201					$gscript ='<script type="text/javascript" src="http://maps.google.com/maps/api/js?v=3&sensor=false"></script>';
202				}
203
204				$vscript = $this->getConf('veScriptUrl');
205				$vscript = $vscript ? '<script type="text/javascript" src="' . $vscript . '"></script>' : "";
206
207				//$yscript = $this->getConf('yahooScriptUrl');
208				//$yscript = $yscript ? '<script type="text/javascript" src="' . $yscript . '"></script>' : "";
209
210				$olscript = $this->getConf('olScriptUrl');
211				$olscript = $olscript ? '<script type="text/javascript" src="' . $olscript . '"></script>' : "";
212				$olscript = str_replace('DOKU_BASE/', DOKU_BASE, $olscript);
213
214				$scriptEnable = '<script type="text/javascript">' . "\n" . '<!--//--><![CDATA[//><!--' . "\n";
215				$scriptEnable .= $olscript ? 'olEnable = true;' : 'olEnable = false;';
216				//$scriptEnable .= $yscript ? ' yEnable = true;' : ' yEnable = false;';
217				$scriptEnable .= $vscript ? ' veEnable = true;' : ' veEnable = false;';
218				$scriptEnable .= 'gEnable = '.($gEnable ? 'true' : 'false').';';
219				$scriptEnable .= 'osmEnable = '.($osmEnable ? 'true' : 'false').';';
220				$scriptEnable .= 'mqEnable = '.($mqEnable ? 'true' : 'false').';';
221				$scriptEnable .= 'bEnable = '.($enableBing ? 'true' : 'false').';';
222				$scriptEnable .= 'bApiKey="'.$this->getConf('bingAPIKey').'";';
223				$scriptEnable .= 'OpenLayers.ImgPath = "'.DOKU_BASE.'lib/plugins/openlayersmap/lib/'.$this->getConf('olMapStyle').'/";';
224				$scriptEnable .= "\n" . '//--><!]]>' . "\n" . '</script>';
225			}
226			$renderer->doc .= "
227			$gscript
228			$vscript
229			$olscript
230			$scriptEnable";
231
232			$renderer->doc .= '
233				<div id="'.$mapid.'-static" class="olStaticMap">'.$staticImgUrl.'</div>
234				<div id="'.$mapid.'-clearer" class="clearer"><p>&nbsp;</p></div>';
235
236			// render a (hidden) table of the POI for the print and a11y presentation
237			$renderer->doc .= ' 	<div class="olPOItableSpan" id="'.$mapid.'-table-span"><table class="olPOItable" id="'.$mapid.'-table" summary="'.$poitabledesc.'" title="'.$this->getLang('olmapPOItitle').'">
238		<caption class="olPOITblCaption">'.$this->getLang('olmapPOItitle').'</caption>
239		<thead class="olPOITblHeader">
240			<tr>
241				<th class="rowId" scope="col">id</th>
242				<th class="icon" scope="col">'.$this->getLang('olmapPOIicon').'</th>
243				<th class="lat" scope="col" title="'.$this->getLang('olmapPOIlatTitle').'">'.$this->getLang('olmapPOIlat').'</th>
244				<th class="lon" scope="col" title="'.$this->getLang('olmapPOIlonTitle').'">'.$this->getLang('olmapPOIlon').'</th>
245				<th class="txt" scope="col">'.$this->getLang('olmapPOItxt').'</th>
246			</tr>
247		</thead>
248		<tfoot class="olPOITblFooter"><tr><td colspan="5">'.$poitabledesc.'</td></tr></tfoot>
249		<tbody class="olPOITblBody">'.$poitable.'</tbody>
250	</table></div>';
251			//TODO no tfoot when $poitabledesc is empty
252
253			// render inline mapscript
254			$renderer->doc .="				<script type='text/javascript'><!--//--><![CDATA[//><!--";
255			    // var $mapid = $param
256			$renderer->doc .="				olMapData[$mapnumber] = $param
257			   //--><!]]></script>";
258			$mapnumber++;
259			return true;
260		} elseif ($mode == 'metadata') {
261			// render metadata if available
262			if (!(($this->dflt['lat']==$mainLat)||($thisdflt['lon']==$mainLon))){
263				// unless they are the default
264				$renderer->meta['geo']['lat'] = $mainLat;
265				$renderer->meta['geo']['lon'] = $mainLon;
266			}
267			return true;
268		}
269		return false;
270	}
271
272	/**
273	 * extract parameters for the map from the parameter string
274	 *
275	 * @param   string    $str_params   string of key="value" pairs
276	 * @return  array                   associative array of parameters key=>value
277	 */
278	private function _extract_params($str_params) {
279		$param = array ();
280		preg_match_all('/(\w*)="(.*?)"/us', $str_params, $param, PREG_SET_ORDER);
281		// parse match for instructions, break into key value pairs
282		$gmap = $this->dflt;
283		foreach ($param as $kvpair) {
284			list ($match, $key, $val) = $kvpair;
285			$key = strtolower($key);
286			if (isset ($gmap[$key])){
287				if ($key == 'summary'){
288					// preserve case for summary field
289					$gmap[$key] = $val;
290				}else {
291					$gmap[$key] = strtolower($val);
292				}
293			}
294		}
295		return $gmap;
296	}
297
298	/**
299	 * extract overlay points for the map from the wiki syntax data
300	 *
301	 * @param   string    $str_points   multi-line string of lat,lon,text triplets
302	 * @return  array                   multi-dimensional array of lat,lon,text triplets
303	 */
304	private function _extract_points($str_points) {
305		$point = array ();
306		//preg_match_all('/^([+-]?[0-9].*?),\s*([+-]?[0-9].*?),(.*?),(.*?),(.*?),(.*)$/um', $str_points, $point, PREG_SET_ORDER);
307		/*
308		group 1: ([+-]?[0-9]+(?:\.[0-9]*)?)
309		group 2: ([+-]?[0-9]+(?:\.[0-9]*)?)
310		group 3: (.*?)
311		group 4: (.*?)
312		group 5: (.*?)
313		group 6: (.*)
314		*/
315		preg_match_all('/^([+-]?[0-9]+(?:\.[0-9]*)?),\s*([+-]?[0-9]+(?:\.[0-9]*)?),(.*?),(.*?),(.*?),(.*)$/um', $str_points, $point, PREG_SET_ORDER);
316		// create poi array
317		$overlay = array ();
318		foreach ($point as $pt) {
319			list ($match, $lat, $lon, $angle, $opacity, $img, $text) = $pt;
320			$lat = is_numeric($lat) ? $lat : 0;
321			$lon = is_numeric($lon) ? $lon : 0;
322			$angle = is_numeric($angle) ? $angle : 0;
323			$opacity = is_numeric($opacity) ? $opacity : 0.8;
324			$img = trim($img);
325			// TODO validate using exist & set up default img?
326			$text = addslashes(str_replace("\n", "", p_render("xhtml", p_get_instructions($text), $info)));
327			$overlay[] = array($lat, $lon, $text, $angle, $opacity, $img);
328		}
329		return $overlay;
330	}
331
332	/**
333	 * Create a MapQuest static map API image url.
334	 * @param array $gmap
335	 * @param array $overlay
336	 */
337	private function _getMapQuest($gmap,$overlay) {
338		$sUrl=$this->getConf('iconUrlOverload');
339		if (!$sUrl){
340			$sUrl=DOKU_URL;
341		}
342		switch ($gmap['baselyr']){
343			case 'mapquest hybrid':
344				$maptype='hyb';
345				break;
346			case 'mapquest sat':
347				// $maptype='sat'
348				// because sat coverage is very limited use 'hyb' instead of 'sat' so we don't get a blank map
349				$maptype='hyb';
350				break;
351			case 'mapquest road':
352			default:
353				$maptype='map';
354				break;
355		}
356		$imgUrl = "http://open.mapquestapi.com/staticmap/v3/getmap?declutter=true&";
357		if (count($overlay)< 1){
358			$imgUrl .= "?center=".$gmap['lat'].",".$gmap['lon'];
359			//max level for mapquest is 16
360			if ($gmap['zoom']>16) {
361				$imgUrl .= "&zoom=16";
362			} else			{
363				$imgUrl .= "&zoom=".$gmap['zoom'];
364			}
365		}
366		// use bestfit instead of center/zoom, needs upperleft/lowerright corners
367		//$bbox=$this->_calcBBOX($overlay, $gmap['lat'], $gmap['lon']);
368		//$imgUrl .= "bestfit=".$bbox['minlat'].",".$bbox['maxlon'].",".$bbox['maxlat'].",".$bbox['minlon'];
369
370		// TODO declutter option works well for square maps but not for rectangular, maybe compensate for that or compensate the mbr..
371		$imgUrl .= "&size=".str_replace("px", "",$gmap['width']).",".str_replace("px", "",$gmap['height']);
372
373		// TODO mapquest allows using one image url with a multiplier $NUMBER eg:
374		// $NUMBER = 2
375		// $imgUrl .= DOKU_URL."/".DOKU_PLUGIN."/".getPluginName()."/icons/".$img.",$NUMBER,C,".$lat1.",".$lon1.",0,0,0,0,C,".$lat2.",".$lon2.",0,0,0,0";
376		if (!empty ($overlay)) {
377			$imgUrl .= "&xis=";
378			foreach ($overlay as $data) {
379				list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
380				//$imgUrl .= $sUrl."lib/plugins/openlayersmap/icons/".$img.",1,C,".$lat.",".$lon.",0,0,0,0,";
381				$imgUrl .= $sUrl."lib/plugins/openlayersmap/icons/".$img.",1,C,".$lat.",".$lon.",";
382			}
383			$imgUrl = substr($imgUrl,0,-1);
384		}
385		$imgUrl .= "&imageType=png&type=".$maptype;
386		dbglog($imgUrl,'syntax_plugin_openlayersmap_olmap::_getMapQuest: MapQuest image url is:');
387		return $imgUrl;
388	}
389	/**
390	 *
391	 * Create a Google maps static image url w/ the poi.
392	 * @param array $gmap
393	 * @param array $overlay
394	 */
395	private function _getGoogle($gmap, $overlay){
396		$sUrl=$this->getConf('iconUrlOverload');
397		if (!$sUrl){
398			$sUrl=DOKU_URL;
399		}
400		switch ($gmap['baselyr']){
401			case 'google hybrid':
402				$maptype='hybrid';
403				break;
404			case 'google sat':
405				$maptype='satellite';
406				break;
407			case 'google relief':
408				$maptype='terrain';
409				break;
410			case 'google road':
411			default:
412				$maptype='roadmap';
413				break;
414		}
415		// TODO maybe use viewport / visible instead of center/zoom,
416		//		see: https://code.google.com/intl/nl/apis/maps/documentation/staticmaps/#ImplicitPositioning
417		//http://maps.google.com/maps/api/staticmap?center=51.565690,5.456756&zoom=16&size=600x400&markers=icon:http://wild-water.nl/dokuwiki/lib/plugins/openlayersmap/icons/marker.png|label:1|51.565690,5.456756&markers=icon:http://wild-water.nl/dokuwiki/lib/plugins/openlayersmap/icons/marker-blue.png|51.566197,5.458966|label:2&markers=icon:http://wild-water.nl/dokuwiki/lib/plugins/openlayersmap/icons/parking.png|51.567177,5.457909|label:3&markers=icon:http://wild-water.nl/dokuwiki/lib/plugins/openlayersmap/icons/parking.png|51.566283,5.457330|label:4&markers=icon:http://wild-water.nl/dokuwiki/lib/plugins/openlayersmap/icons/parking.png|51.565630,5.457695|label:5&sensor=false&format=png&maptype=roadmap
418		$imgUrl = "http://maps.google.com/maps/api/staticmap?sensor=false";
419		$imgUrl .= "&size=".str_replace("px", "",$gmap['width'])."x".str_replace("px", "",$gmap['height']);
420		$imgUrl .= "&center=".$gmap['lat'].",".$gmap['lon'];
421		// max is 21 (== building scale), but that's overkill..
422		if ($gmap['zoom']>16) {
423			$imgUrl .= "&zoom=16";
424		} else			{
425			$imgUrl .= "&zoom=".$gmap['zoom'];
426		}
427
428		if (!empty ($overlay)) {
429			$rowId=0;
430			foreach ($overlay as $data) {
431				list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
432				$imgUrl .= "&markers=icon%3a".$sUrl."lib/plugins/openlayersmap/icons/".$img."%7c".$lat.",".$lon."%7clabel%3a".++$rowId;
433			}
434		}
435		$imgUrl .= "&format=png&maptype=".$maptype;
436		global $conf;
437		$imgUrl .= "&language=".$conf['lang'];
438		dbglog($imgUrl,'syntax_plugin_openlayersmap_olmap::_getGoogle: Google image url is:');
439		return $imgUrl;
440	}
441
442	/**
443	 *
444	 * Create a Bing maps static image url w/ the poi.
445	 * @param array $gmap
446	 * @param array $overlay
447	 */
448	private function _getBing($gmap, $overlay){
449		if(!$this->getConf('bingAPIKey')){
450			// in case there is no Bing api key
451			$this->_getMapQuest($gmap, $overlay);
452		}
453		switch ($gmap['baselyr']){
454			case 've hybrid':
455			case 'bing hybrid':
456				$maptype='AerialWithLabels';
457				break;
458			case 've sat':
459			case 'bing sat':
460				$maptype='Aerial';
461				break;
462			case 've normal':
463			case 've road':
464			case 've':
465			case 'bing road':
466			default:
467				$maptype='Road';
468				break;
469		}
470		$bbox=$this->_calcBBOX($overlay, $gmap['lat'], $gmap['lon']);
471		//$imgUrl = "http://dev.virtualearth.net/REST/v1/Imagery/Map/".$maptype."/".$gmap['lat'].",".$gmap['lon']."/".$gmap['zoom'];
472		$imgUrl = "http://dev.virtualearth.net/REST/v1/Imagery/Map/".$maptype."/";
473		$imgUrl .= "?mapArea=".$bbox['minlat'].",".$bbox['minlon'].",".$bbox['maxlat'].",".$bbox['maxlon'];
474		// TODO declutter option works well for square maps but not for rectangular, maybe compensate for that or compensate the mbr..
475		$imgUrl .= "&declutter=1";
476		$imgUrl .= "&ms=".str_replace("px", "",$gmap['width']).",".str_replace("px", "",$gmap['height']);
477		$imgUrl .= "&key=".$this->getConf('bingAPIKey');
478		if (!empty ($overlay)) {
479			$rowId=0;
480			foreach ($overlay as $data) {
481				list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
482				// TODO icon style lookup, see: http://msdn.microsoft.com/en-us/library/ff701719.aspx for iconStyle
483				$iconStyle=32;
484				$rowId++;
485				// NOTE: the max number of pushpins is 18!
486				if ($rowId==18) {
487					break;
488				}
489				$imgUrl .= "&pp=$lat,$lon;$iconStyle;$rowId";
490			}
491		}
492		dbglog($imgUrl,'syntax_plugin_openlayersmap_olmap::_getBing: bing image url is:');
493		return $imgUrl;
494	}
495
496	/**
497	 *
498	 * Create a static OSM map image url w/ the poi from http://staticmap.openstreetmap.de (staticMapLite)
499	 * @param array $gmap
500	 * @param array $overlay
501	 */
502	private function _getStaticOSM($gmap, $overlay){
503		//http://staticmap.openstreetmap.de/staticmap.php?center=47.000622235634,10.117187497601&zoom=5&size=500x350
504		// &markers=48.999812532766,8.3593749976708,lightblue1|43.154850037315,17.499999997306,lightblue1|49.487527053077,10.820312497573,ltblu-pushpin|47.951071133739,15.917968747369,ol-marker|47.921629720114,18.027343747285,ol-marker-gold|47.951071133739,19.257812497236,ol-marker-blue|47.180141361692,19.257812497236,ol-marker-green
505		$imgUrl = "http://staticmap.openstreetmap.de/staticmap.php";
506		$imgUrl .= "?center=".$gmap['lat'].",".$gmap['lon'];
507		$imgUrl .= "&size=".str_replace("px", "",$gmap['width'])."x".str_replace("px", "",$gmap['height']);
508		if ($gmap['zoom']>16) {
509			$imgUrl .= "&zoom=16";
510		} else			{
511			$imgUrl .= "&zoom=".$gmap['zoom'];
512		}
513
514		switch ($gmap['baselyr']){
515			case 'mapnik':
516				$maptype='mapnik';
517				break;
518			case 't@h':
519				$maptype='osmarenderer';
520				break;
521			case 'cycle map':
522				$maptype='cycle';
523				break;
524			default:
525				$maptype='';
526			break;
527		}
528		$imgUrl .= "&maptype=".$maptype;
529
530		if (!empty ($overlay)) {
531			$rowId=0;
532			$imgUrl .= "&markers=";
533			foreach ($overlay as $data) {
534				list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
535				$rowId++;
536				$iconStyle = "lightblue$rowId";
537				$imgUrl .= "$lat,$lon,$iconStyle%7c";
538			}
539			$imgUrl = substr($imgUrl,0,-3);
540		}
541
542		dbglog($imgUrl,'syntax_plugin_openlayersmap_olmap::_getStaticOSM: bing image url is:');
543		return $imgUrl;
544	}
545	/**
546	 * Calculate the minimum bbox for a start location + poi.
547	 *
548	 * @param array $overlay  multi-dimensional array of array($lat, $lon, $text, $angle, $opacity, $img)
549	 * @param float $lat latitude for map center
550	 * @param float $lon longitude for map center
551	 * @return multitype:float array describing the mbr and center point
552	 */
553	private function _calcBBOX($overlay, $lat, $lon){
554		$lats[] = $lat;
555		$lons[] = $lon;
556		foreach ($overlay as $data) {
557			list ($lat, $lon, $text, $angle, $opacity, $img) = $data;
558			$lats[] = $lat;
559			$lons[] = $lon;
560		}
561		sort($lats);
562		sort($lons);
563		// TODO: make edge/wrap around cases work
564		$centerlat = $lats[0]+($lats[count($lats)-1]-$lats[0]);
565		$centerlon = $lons[0]+($lons[count($lats)-1]-$lons[0]);
566		return array('minlat'=>$lats[0], 'minlon'=>$lons[0],
567						'maxlat'=>$lats[count($lats)-1], 'maxlon'=>$lons[count($lats)-1],
568						'centerlat'=>$centerlat,'centerlon'=>$centerlon);
569	}
570}