I am using KML layers in Google Maps. And when I load a layer into a map, it shows up in every world as far as you keep horizontally scrolling. For layers with content on a quite small area that doesn't pose a problem, as the map will automatically zoom to show only the relevant content from the layer. But for layers that show markers across the whole world, having them repeat again on the next world, it looks like a bunch of gibberish.
Take for example this sample code from Google Maps, but with a layer of Holocene volcanoes instead of their layer provided by default. If you want to see all of them, you see more than all of them, and you have no reference for when you've come to the place where they are repeating the ones you've already looked at.
Example: http://jsfiddle.net/eppptn2x/
Code:
var map;
var elevator;
var myOptions = {
zoom: 2,
center: new google.maps.LatLng(10, 0)
};
map = new google.maps.Map(document.getElementById('map'), myOptions);
var markers = [];
var georssLayer = new google.maps.KmlLayer({
url: 'http://www.volcano.si.edu/ge/GVPWorldVolcanoes.kml'
});
georssLayer.setMap(map);
How do I prevent this behavior? How do I make all layer content, and any markers, be limited to only one world?
I hope I understood your question. Try entering a value for minZOom in mapOptions like this:
var myOptions = {
zoom: 2,
minZoom:2,
center: new google.maps.LatLng(10, 0)
};
I know it's too late but may be it would be useful for someone.
To prevent repeating markers you can set optimized option to false
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
title: 'Hello World!',
optimized: false
});
You can find related topic here.
Related
The Google map on my site no longer shows up. I can see the zoom in/out slider, map/satellite buttons, etc... but the map itself no longer shows up. I read somewhere that the map should be in a div tag labeled "map" with both height and width stated in the CSS. The map has always had height/width CSS properties listed, but the ID was labeled differently. I changed the ID to map and corresponding CSS, but the map still will not show up. I read elsewhere that the Google Analytics by Yoast plugin was also causing similar errors. I have disabled all plugins and then one at a time I have reactivated them to see if another plugin might be the issue. However, it seems that none of the plugins running have any effect on the map displaying.
I am a web designer with some HTML/CSS knowledge. I designed this site and had hired a guy to code it into a custom Wordpress theme for me. Like I said, the map had been showing just fine, but no longer does and I have no idea why. I could really use some help to figure this out. I'm trying to learn more about coding so in the future I can debug and fix things like this on my own. A little help would be greatly appreciated!
Here is a link to the page with the map: http://seegerlaw.com/contact-us/
Please let me know if you need any other information from me.
You're using undocumented fields:
function initialize() {
geocoder = new google.maps.Geocoder();
codeAddr(function(lat, lng) {
myLatlng = new google.maps.LatLng(lat,lng);
var mapOptions = {
zoom: 15,
center: myLatlng,
disableDefaultUI: false,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
var marker = new google.maps.Marker({
position: myLatlng,
map: map
});
});
}
function codeAddr(callback) {
if (geocoder) {
geocoder.geocode({ 'address': address }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
console.log(results[0].geometry);
maps_lat = results[0].geometry.location["kb"];
maps_lng = results[0].geometry.location["lb"];
callback(maps_lat, maps_lng);
}
else {
console.log("Geocoding failed: " + status);
}
});
}
}
Use the lat() and lng() properties of LatLng to get their values.
Even better, just pass in the LatLng directly from the Geocoder to the MapOptions object:
codeAddr(function(latLng) {
var mapOptions = {
center: latLng,
...
};
...
});
callback(results[0].geometry.location);
Even better – it appears that you always geocode the same address – just hardcode the LatLng into your code.
Not sure if this is possible but I have set my map up with custom styles and marker and I want to ensure the map shows at this level but with London in view. To do so I centred the map at a different location to my marker. I would like the map to zoom to my location if possible instead of the centre.
var myLatlng = new google.maps.LatLng('51.4525368','0.2481994');
var mapOptions = {
center: new google.maps.LatLng('51.4600368','0.0781994'),
mapTypeId: google.maps.MapTypeId.ROADMAP,
zoom: 11,
mapTypeControl: false,
scrollwheel:false
};
Also if anybody can tell me why my info window is displaying all funky I would appreciate too.
It has been tough to understand your question but if I got you right, you are trying to fit both center of London and your location on the map without setting a center on some position on the map. If that's correct, then you need google.maps.LatLngBounds() to get it done.
var bounds= new google.maps.LatLngBounds();
var London= new google.maps.LatLng(//London values);
var myLatLng = new google.maps.LatLng(//your values);
bounds.extend(London);
bounds.extend(myLatLng);
map.fitBounds(bounds);
Check if this serves your purpose.
Google Maps javascript API question - Map object recenters after applying KML layer. How do I prevent this?
I created a simple page with a map. When I apply a simple polygon KML, it recenters and zooms the map. Any ideas?
var myOptions = {
center: new google.maps.LatLng(27, -97),
zoom: 17,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var buildings = new google.maps.KmlLayer('https://mysite/site/buildings.xml');
buildings.setMap(map);
//i tried this to recenter and zoom, but no dice.
var posn = new google.maps.LatLng(27, -97);
map.setCenter(posn);
map.setZoom(17);
Sounds like you need the preserveViewport option. From the documentation:
By default, the input map is centered and zoomed to the bounding box of the contents of the layer. If this option is set to true, the viewport is left unchanged, unless the map's center and zoom were never set.
Pass it a KMLLayerOptions object through the constructor:
var buildings = new google.maps.KmlLayer('https://mysite/site/buildings.xml',{preserveViewport:true});
I am putting together a clients contact us page and I need to have two Google maps on it.
The first map is a small version of the second. The second map opens up in a lightbox activated by a link beneath the first.
The issue is, the large map goes wrong when I attempt to open it. I typically get one tile in the top left hand corner and nothing more.
You can see for yourself at http://test2omniforce.co.uk/node/8. It's some kind of conflict between the two because if I remove the small map, the larger map works fine.
I am trying to determine why this happens, and how I can fix it.
OS: Here's my code for the large map (the small map code is exactly the same except instead of map_canvas, it uses map_canvas2).
var myLatlng = new google.maps.LatLng(53.3820845337596, -1.46965489864111);
var myOptions = {
zoom: 15,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
scrollwheel:false
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: 'we are right here ...'
});
var myLatlng2 = new google.maps.LatLng(53.3820845337596, -1.46965489864111);
marker.setMap(map);
google.maps.event.addListener(marker, 'click', function(){
infowindow.open(map, marker);
});
Inspired by #rggardner's suggestion, I made the small map a static map. I had no idea those existed before.
That removes the conflict and the large map now plays nice.
#rggardner, thank you very much!
I am trying to create a site that has option to add maps to the site using google maps api. I found hundreds of tutorial and blog posts on embeding map in the site. But what I actually want is a way to give the user choose a place on the map and add marker. Then get the co-ordinates of the marker and store it in the database of retrieving and showing in the front-end. I have seen this option given wordpress plugins like mappress. But now I'm trying to achieve this in codeigniter. I can't find any thing to start on. Can any one point out some one tell me where to start?
This is really easy the 3rd version of the Google maps API. Versions before that where much more complicated, and most of the tutorials floating around are for those versions. Have a look through the API documentation and examples.
Adding a marker is as simple as:
var marker=new google.maps.Marker({/* ... see API */});
Adding an event (eg click) to a marker is as simple as:
var marker_click=new google.maps.event.addListener(
marker,
'click',
function() {/*...*/});
Sounds like you'd want a click event for the map, which you'd translate into a latlong, then (a) generate a marker on the map with JS, and (b) post that back to your server using AJAX, or by storing the values in a hidden form field to be submitted after.
Update:
Mostly from the API documentation # http://code.google.com/apis/maps/documentation/javascript/events.html:
var map;
function initialize() {
var myLatlng = new google.maps.LatLng(-25.363882,131.044922);
var myOptions = {
zoom: 4,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
google.maps.event.addListener(map, 'click', function(event) {
placeMarker(event.latLng);
});
}
function placeMarker(location) {
var clickedLocation = new google.maps.LatLng(location);
var marker = new google.maps.Marker({
position: location,
map: map
});
map.setCenter(location);
/*Do your processing here:
* eg. ajax.post('addMarkerDB&lat='+location.lat+'&long='+location.long);
*/
}
Note: There is no ajax.post function by default, but there could be :)