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1 | <?php | |
2 | /** | |
3 | * Draw Polygons in Google Maps and Determine whether an Address is in Polygons | |
4 | * | |
5 | * This sample source code uses Google Maps Javascript API V3 to draw polygons in Google Maps. | |
6 | * (Refer https://google-developers.appspot.com/maps/documentation/javascript/examples/drawing-tools) | |
7 | * | |
8 | * The address auto-complete uses Google Places Javascript library. | |
9 | * (Refer https://developers.google.com/maps/documentation/javascript/places#places_autocomplete) | |
10 | * | |
11 | * The server-side code will retrieve address' latitude and longitude using Google Gecoding API. | |
12 | * (Refer https://developers.google.com/maps/documentation/geocoding/) | |
13 | * | |
14 | * Using "Point-In-Polygon" Algorithm, the server-side code will determine whether address' coordinate is inside of polygons or outside. | |
15 | * (Refer http://alienryderflex.com/polygon/) | |
16 | * | |
17 | * ===== How To Use ===== | |
18 | * | |
19 | * First, draw polygons | |
20 | * Second, search address and click "Check Inside/Outside Polygons" submit button | |
21 | * | |
22 | * ===== For Your Information ===== | |
23 | * If you need client-side Javascript to determine whether an address is in/out polygons, | |
24 | * you can use google.maps.geometry.poly.containsLocation function in Google Maps API. | |
25 | * (Refer https://developers.google.com/maps/documentation/javascript/reference#poly) | |
26 | * | |
27 | * The address auto-complete (Google Places Library) returns address information including coordinate. | |
28 | * | |
29 | * @author Chris LEE | |
30 | * | |
31 | */ | |
32 | ||
33 | // Set up default polygon | |
34 | $polygons = array(); | |
35 | ||
36 | $polygon = array( | |
37 | array(-37.813310, 144.951553) | |
38 | , array(-37.820836, 144.954901) | |
39 | , array(-37.815209, 144.974728) | |
40 | , array(-37.807750,144.971209) | |
41 | , array(-37.813039,144.951468) | |
42 | ); | |
43 | ||
44 | // If received coordinates, then store into arrays | |
45 | $got_coordinates = isset($_GET['coordinates']) ? $_GET['coordinates'] : array(); | |
46 | ||
47 | if(!empty($got_coordinates)) | |
48 | { | |
49 | foreach($got_coordinates as $coordinates) | |
50 | { | |
51 | if(!empty($coordinates)) | |
52 | { | |
53 | $new_box = array(); | |
54 | foreach($coordinates as $coordinate) | |
55 | { | |
56 | $coordinate = explode("|", $coordinate); | |
57 | $new_box[] = array($coordinate[0], $coordinate[1]); | |
58 | } | |
59 | $polygons[] = $new_box; | |
60 | unset($new_box); | |
61 | } | |
62 | } | |
63 | } | |
64 | else | |
65 | { | |
66 | $polygons[] = $polygon; | |
67 | } | |
68 | unset($polygon); | |
69 | unset($got_coordinates); | |
70 | ||
71 | // Set up default address | |
72 | $got_this_address = isset($_GET['address']) ? $_GET['address'] : "140 Elizabeth Street, Melbourne, Victoria, Australia"; | |
73 | ||
74 | // Get address coordinate from Google Maps API | |
75 | $address = json_decode(get_address_coordinate($got_this_address)); | |
76 | ||
77 | if(!empty($address->results)) | |
78 | { | |
79 | $address = $address->results[0]; | |
80 | } | |
81 | $address_x = $address->geometry->location->lat; | |
82 | $address_y = $address->geometry->location->lng; | |
83 | ||
84 | $result = ""; | |
85 | ||
86 | if(!empty($polygons)) | |
87 | { | |
88 | foreach($polygons as $polygon) | |
89 | { | |
90 | $no_of_polygons = sizeof($polygon); | |
91 | ||
92 | $polygons_x = array(); | |
93 | $polygons_y = array(); | |
94 | ||
95 | foreach($polygon as $poly) | |
96 | { | |
97 | $polygons_x[] = $poly[0]; | |
98 | $polygons_y[] = $poly[1]; | |
99 | } | |
100 | ||
101 | ||
102 | if (determine_in_polygon($no_of_polygons, $polygons_x, $polygons_y, $address_x, $address_y)) | |
103 | { | |
104 | $result = "The Address '".$got_this_address."' (". $address_x.", ".$address_y.") is in polygons!"; | |
105 | break; | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | if($result == "") | |
111 | { | |
112 | $result = "The Address '".$got_this_address."' (". $address_x.", ".$address_y.") is not in polygons!"; | |
113 | } | |
114 | ||
115 | function determine_in_polygon($no_of_polygons, $polygons_x, $polygons_y, $address_x, $address_y) { | |
116 | $j = $no_of_polygons - 1; | |
117 | $odd_nodes = 0; | |
118 | for ($i = 0; $i < $no_of_polygons; $i++) | |
119 | { | |
120 | if ($polygons_y[$i] < $address_y && $polygons_y[$j] >= $address_y || $polygons_y[$j] < $address_y && $polygons_y[$i] >= $address_y) | |
121 | { | |
122 | if ($polygons_x[$i] + ($address_y - $polygons_y[$i]) / ($polygons_y[$j] - $polygons_y[$i]) * ($polygons_x[$j] - $polygons_x[$i]) < $address_x) | |
123 | { | |
124 | $odd_nodes = !$odd_nodes; | |
125 | } | |
126 | } | |
127 | $j = $i; | |
128 | } | |
129 | ||
130 | return $odd_nodes; | |
131 | } | |
132 | ||
133 | function get_address_coordinate($address) | |
134 | { | |
135 | $url = "http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($address)."&sensor=false"; | |
136 | $ch = curl_init(); | |
137 | curl_setopt($ch, CURLOPT_URL, $url); | |
138 | curl_setopt($ch, CURLOPT_HEADER, 0); | |
139 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); | |
140 | $output = curl_exec($ch); | |
141 | curl_close($ch); | |
142 | return $output; | |
143 | } | |
144 | ?><!DOCTYPE html> | |
145 | <html> | |
146 | <head> | |
147 | <title>Draw Polygons in Google Maps and Determine whether an Address is in Polygons</title> | |
148 | <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"> | |
149 | - | <script src="jquery-1.9.1.min.js" type="text/javascript" charset="utf-8"></script> |
149 | + | <script src="http://code.jquery.com/jquery-1.9.1.min.js"></script> |
150 | <meta charset="utf-8"> | |
151 | <style> | |
152 | #map { | |
153 | padding: 0; | |
154 | margin: 0; | |
155 | width: 65%; | |
156 | height: 65%; | |
157 | position: absolute; | |
158 | } | |
159 | ||
160 | #panel { | |
161 | width: 65%; | |
162 | font-family: Arial, sans-serif; | |
163 | font-size: 13px; | |
164 | margin: 10px; | |
165 | } | |
166 | </style> | |
167 | ||
168 | <script src="http://maps.google.com/maps/api/js?sensor=false&libraries=geometry,places,drawing"></script> | |
169 | <script> | |
170 | var map, drawing_manager, selected_shape, overlays = []; | |
171 | ||
172 | function clear_selection() | |
173 | { | |
174 | if (selected_shape) | |
175 | { | |
176 | selected_shape.setEditable(false); | |
177 | selected_shape = null; | |
178 | } | |
179 | } | |
180 | ||
181 | function set_selection(shape) | |
182 | { | |
183 | clear_selection(); | |
184 | selected_shape = shape; | |
185 | shape.setEditable(false); | |
186 | } | |
187 | ||
188 | function delete_selected_shape() | |
189 | { | |
190 | if (selected_shape) { | |
191 | if(overlays) | |
192 | { | |
193 | $.each(overlays, function(i, overlay){ | |
194 | if(overlay == selected_shape) | |
195 | { | |
196 | overlays[i] = null; | |
197 | } | |
198 | }); | |
199 | } | |
200 | ||
201 | selected_shape.setMap(null); | |
202 | reset_coordinates(); | |
203 | } | |
204 | } | |
205 | ||
206 | function reset_coordinates() | |
207 | { | |
208 | $("#coordinates").html(""); | |
209 | var index = 0; | |
210 | if(overlays) | |
211 | { | |
212 | $.each(overlays, function(i, overlay){ | |
213 | if(overlay) | |
214 | { | |
215 | $.each(overlay.getPath().getArray(), function (j, coordinate){ | |
216 | $("#coordinates").append('<input type="hidden" name="coordinates['+index+'][]" value="' + coordinate.lat() + "|" + coordinate.lng() + '" />'); | |
217 | }); | |
218 | index++; | |
219 | } | |
220 | }); | |
221 | } | |
222 | } | |
223 | ||
224 | function initialize() | |
225 | { | |
226 | // Set up Address Autocomplete | |
227 | var input = $("#address")[0]; | |
228 | var autocomplete = new google.maps.places.Autocomplete(input); | |
229 | ||
230 | // Set up Google Map | |
231 | map = new google.maps.Map($("#map")[0], { | |
232 | zoom: 15, | |
233 | center: new google.maps.LatLng(<?php echo $address_x;?>, <?php echo $address_y;?>), | |
234 | mapTypeId: google.maps.MapTypeId.ROADMAP, | |
235 | disableDefaultUI: true, | |
236 | zoomControl: true | |
237 | }); | |
238 | ||
239 | var marker = new google.maps.Marker({ | |
240 | position: new google.maps.LatLng(<?php echo $address_x;?>, <?php echo $address_y;?>), | |
241 | map: map, | |
242 | title: "<?php echo $got_this_address;?>" | |
243 | }); | |
244 | ||
245 | ||
246 | // Configure drawingManager options | |
247 | var polygon_options = { | |
248 | editable: true, | |
249 | strokeColor : "#0000FF", | |
250 | strokeOpacity : 0.8, | |
251 | strokeWeight : 2, | |
252 | fillColor : "#0000FF", | |
253 | fillOpacity : 0.4 | |
254 | }; | |
255 | ||
256 | // Set up drawing manager | |
257 | drawing_manager = new google.maps.drawing.DrawingManager({ | |
258 | drawingControl: true, | |
259 | drawingControlOptions: { | |
260 | position: google.maps.ControlPosition.TOP_CENTER, | |
261 | drawingModes: [ | |
262 | google.maps.drawing.OverlayType.POLYGON, | |
263 | ] | |
264 | }, | |
265 | markerOptions: { | |
266 | draggable: true | |
267 | }, | |
268 | polylineOptions: { | |
269 | editable: true | |
270 | }, | |
271 | polygonOptions: polygon_options, | |
272 | map: map | |
273 | }); | |
274 | ||
275 | google.maps.event.addListener(drawing_manager, "overlaycomplete", function(e) { | |
276 | if (e.type != google.maps.drawing.OverlayType.MARKER) | |
277 | { | |
278 | drawing_manager.setDrawingMode(null); | |
279 | ||
280 | var new_shape = e.overlay; | |
281 | new_shape.type = e.type; | |
282 | ||
283 | google.maps.event.addListener(new_shape, "click", function() { | |
284 | set_selection(new_shape); | |
285 | }); | |
286 | ||
287 | set_selection(new_shape); | |
288 | overlays.push(new_shape); | |
289 | ||
290 | reset_coordinates(); | |
291 | } | |
292 | }); | |
293 | ||
294 | ||
295 | ||
296 | google.maps.event.addListener(drawing_manager, "drawingmode_changed", clear_selection); | |
297 | google.maps.event.addListener(map, "click", clear_selection); | |
298 | google.maps.event.addDomListener($("#delete-button")[0], "click", delete_selected_shape); | |
299 | ||
300 | // Set up polygons | |
301 | <?php | |
302 | if(!empty($polygons)) | |
303 | { | |
304 | foreach($polygons as $key => $polygon) | |
305 | { | |
306 | ?> | |
307 | var poly<?php echo $key;?>, box<?php echo $key;?>; | |
308 | box<?php echo $key;?> = [ | |
309 | <?php | |
310 | foreach($polygon as $polygon_key => $co) | |
311 | { | |
312 | if($polygon_key != 0) | |
313 | { | |
314 | echo ", "; | |
315 | } | |
316 | ?> | |
317 | new google.maps.LatLng(<?php echo $co[0];?>, <?php echo $co[1];?>) | |
318 | <?php | |
319 | } | |
320 | ?> | |
321 | ]; | |
322 | poly<?php echo $key;?> = new google.maps.Polygon({ | |
323 | paths : box<?php echo $key;?>, | |
324 | strokeColor : "#0000FF", | |
325 | strokeOpacity : 0.8, | |
326 | strokeWeight : 2, | |
327 | fillColor : "#0000FF", | |
328 | fillOpacity : 0.4 | |
329 | }); | |
330 | poly<?php echo $key;?>.setMap(map); | |
331 | ||
332 | google.maps.event.addListener(poly<?php echo $key;?>, "click", function() { | |
333 | set_selection(poly<?php echo $key;?>); | |
334 | }); | |
335 | set_selection(poly<?php echo $key;?>); | |
336 | overlays.push(poly<?php echo $key;?>); | |
337 | <?php | |
338 | } | |
339 | } | |
340 | ?> | |
341 | ||
342 | } | |
343 | ||
344 | google.maps.event.addDomListener(window, "load", initialize); | |
345 | ||
346 | </script> | |
347 | </head> | |
348 | <body> | |
349 | <h1>Draw Polygons in Google Maps and Determine whether an Address is in Polygons</h1> | |
350 | <pre>/** | |
351 | * Draw Polygons in Google Maps and Determine whether an Address is in Polygons | |
352 | * | |
353 | * This sample source code uses Google Maps Javascript API V3 to draw polygons in Google Maps. | |
354 | * (Refer https://google-developers.appspot.com/maps/documentation/javascript/examples/drawing-tools) | |
355 | * | |
356 | * The address auto-complete uses Google Places Javascript library. | |
357 | * (Refer https://developers.google.com/maps/documentation/javascript/places#places_autocomplete) | |
358 | * | |
359 | * The server-side code will retrieve address' latitude and longitude using Google Gecoding API. | |
360 | * (Refer https://developers.google.com/maps/documentation/geocoding/) | |
361 | * | |
362 | * Using "Point-In-Polygon" Algorithm, the server-side code will determine whether address' coordinate is inside of polygons or outside. | |
363 | * (Refer http://alienryderflex.com/polygon/) | |
364 | * | |
365 | * ===== How To Use ===== | |
366 | * | |
367 | * First, draw polygons | |
368 | * Second, search address and click "Check Inside/Outside Polygons" submit button | |
369 | * | |
370 | * ===== For Your Information ===== | |
371 | * If you need client-side Javascript to determine whether an address is in/out polygons, | |
372 | * you can use google.maps.geometry.poly.containsLocation function in Google Maps API. | |
373 | * (Refer https://developers.google.com/maps/documentation/javascript/reference#poly) | |
374 | * | |
375 | * The address auto-complete (Google Places Library) returns address information including coordinate. | |
376 | * | |
377 | * @author Chris LEE | |
378 | * | |
379 | */</pre> | |
380 | <div id="panel"> | |
381 | <form method="get"> | |
382 | Search Address: <input type="text" id="address" name="address" value="<?php echo $got_this_address;?>" style="width:50%;"/> | |
383 | <input type="submit" value="Check Inside/Outside Polygons" /> | |
384 | <div id="coordinates" style="display:none;"> | |
385 | <?php | |
386 | if(!empty($polygons)) | |
387 | { | |
388 | foreach($polygons as $key => $polygon) | |
389 | { | |
390 | if(!empty($polygon)) | |
391 | { | |
392 | foreach($polygon as $b) | |
393 | { | |
394 | ?> | |
395 | <input type="hidden" name="coordinates[<?php echo $key;?>][]" value="<?php echo $b[0];?>|<?php echo $b[1];?>" /> | |
396 | <?php | |
397 | } | |
398 | } | |
399 | } | |
400 | } | |
401 | ?> | |
402 | ||
403 | </div> | |
404 | </form> | |
405 | <br /> | |
406 | <strong><?php echo $result;?></strong> | |
407 | <br /><br /> | |
408 | <button id="delete-button">Delete Selected Polygon</button> | |
409 | ||
410 | </div> | |
411 | <div id="map"></div> | |
412 | <br /><br /> | |
413 | <br /><br /> | |
414 | <script type="text/javascript"> | |
415 | var _gaq = _gaq || []; | |
416 | _gaq.push(['_setAccount', 'UA-1581881-5']); | |
417 | _gaq.push(['_trackPageview']); | |
418 | ||
419 | (function() { | |
420 | var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; | |
421 | ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; | |
422 | var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); | |
423 | })(); | |
424 | ||
425 | </script> | |
426 | </body> | |
427 | </html> |