I have a google map as page background and a few div layers above it. When I place markers on the map I would like to be placed in the visible part of the map, not below the divs. In other words.. I need to add padding to the map so the functions like fitBounds(), setCenter() and etc. to position the markers in the visible part of the map.
There are many examples around but none of them looks quite well or it is working at all. Most of them are similar to:
I have tried to calculate the bounds and to extend bounds with some padding but it is a two step process. At first.. the map is positioned at original bounds to get the correct projection and then it is animated to the extended bounds. It doesnt look professional, we have two fitBounds() and the second one is animated. http://jsfiddle.net/seddass/CuKTK/
I have tried to add custom control to my map but it seems that the custom controls doesnt add padding to the map as suggested on many places. http://jsfiddle.net/seddass/wtT3t/1/
Can anyone can provide a working example or a better solution for padding to for Google Map v3? Thanks in advance!
Related
I need to select an rectangular area on a map and identify markers that fall within that area.
Ideally, rectangle should be draggable and resizeable.
I am not too particular about the mapping and Google or Mapbox or Leaflet would all work just fine.
I found location-filter for Leaflet (https://github.com/kajic/leaflet-locationfilter/), which does seem to do the job. However, I couldn't find simple example code that shows how to use it. It has been used on tripcode.com but it is hard to make anything out of what is going on.
Does anyone have any experience with location-filter? If so, can you please point me to simple example of how to use it?
Are there similar examples for other mapping services particularly google maps?
Thanks.
For my bbox page I've snatched two files: SimpleShape, Rectangle from Leaflet.draw plugin and fixed them for better usability. The code for the rectangle is simple:
var rect = L.rectangle([[59.9, 29.9], [60.1, 30.1]]);
map.addLayer(rect);
rect.editing.enable();
rect.on('edit', function() { console.log(rect.getBounds().getBBoxString()); });
For advanced things like centering the rectangle on screen, see source code for the page.
When you are drawing the markers onto the map you will need to add them to some kind of an array which will contain the lat/lng pair of each marker.
You can use Leaflet.draw to draw the rectangle and modify it to return top left and bottom right coordinates on mouse up. On mouse up you can go over the entire list and which elements fit inside that bounding box.
This solution is just an example, there are many ways you can do this.
I am trying achieve a map like the above image using google map. I made the map grayscale by giving saturation to -100 in StyledMapType object and drawn a radius around the marker using Circle object. Now the whole map is grayscle as i cannot set another saturation level inside the circle. Is there any way to achieve this ?
Another idea is to create second map, style it in another way via StyledMapType, make it absolutely positioned, and put it in front of first grayscaled map.
You can make it look round using -webkit-mask like described here
You should also synchronize events between maps, so that they would coincide, i.e. centered to the same position and always have same zoom level.
You need also to create some kind of blocker to avoid recursive calls
var block = false;
google.maps.event.addListener (thismap, 'center_changed', function(event) {
if (block) return;
block = true;
othermap.setCenter(thisMap.getCenter());
block=false;
});
The same should be done for 'center_changed' (to control maps centering) and for 'zoom_changed' (control maps zoom), for both maps
Here I've set up an example
If you will need to create more than one map that way, you'll need to do more work to make them stick to necessary points
As far as I am aware there is no way to accomplish this directly within the API. I have had to achieve a similar effect in the past and the way that I went about it was to create a 'donut' rather than a circle.
Effectively the idea is to create a large shape which excludes a circular area at it's center. This way you can set the opacity on the polygon fairly low in order to highlight the 'area of interest' in this case the central circle.
This is perhaps a good starting point: http://www.geocodezip.com/v3_polygon_example_donut.html
Though obviously in your case your going to want to alter the colors. Also be aware that the size is fixed so unless you limit the map bounds users will be able to zoom out far enough to see the edges (thus ruining the illusion), and polygons distort towards the poles (pesky spherical earth).
Hope this helps.
Is it possible to create custom layers/overlays in google maps?
As an example, would it be possible to have one layer with polygons, another with circles, and a third with markers? and then hide/show these layers individually?
I tried looking at the documentation, but the layers seems to only be a fixed set of predefined layers. And overlays seems to only support image overlays.
Any help on this is appreciated.
I'm not sure if there exists a better way to do this, but I've found a workaround to a similar problem. My example utilizes markers and polylines, but it should be easy to extend the functionality to circles and polygons too.
Link to JSFiddle
Basically it works like this:
Initialize the map.
User selects an option what he would like to see on the map.
Click triggers a method (see HTML part of the fiddle) in the map object that first clears the map and then pushes new overlays on map.
The data that is currently shown on map is stored in arrays, and the map clearing method simply goes through these arrays and checks if there exists any content on map, and removes them if does.
Hope this helps. Cheers!
Does anyone know how to hide the base map in Google Maps V2? I've added the following lines in my attempt to remove the standard map types, but it seems to insist on showing some sort of base map:
map.removeMapType(G_SATELLITE_MAP);
map.removeMapType(G_HYBRID_MAP);
map.removeMapType(G_AERIAL_MAP);
map.removeMapType(G_PHYSICAL_MAP);
I'm adding a KML-overlay using GGeoXml, and that's basically all I want to show. I've also tried to add a blank white KML-layer between the base map and the actual data, but with no luck. Anyone out there who knows how to hide or disable the base map?
In case anyone's having the same issue, I ended up solving it by simply making all the Google-generated map images transparent using jQuery:
jQuery('#map img').css('opacity', '0').css('filter', 'alpha(opacity=0)').css('-moz-opacity', '0').css('-khtml-opacity', '0');
The selector finds all img-tags below the map div id and sets opacity to 0 in most browsers. Left to display on the map is only the KML overlay, which was just what I wanted.
When clicking from one marker to another in Google Maps, the map screen animates the move smoothly if both markers are within them initial map view but jumps if one of the markers is off screen.
I'm trying to set up a map which has several locations within the main map area but has one which is 'off screen'. I have a signpost icon to the more distant location within the initial map area which I want to smoothly scroll to the off screen location when clicked (so as to give a better sense of it's relative location). I can't find anything in the Maps API which would let me do this however.
I could zoom out, move and then zoom in again but this looks a bit jarring. Am I missing something in the API, or does anyone have any suggestions?
Unfortunately, I don't think this is possible (without a change from Google). From the v3 API reference for panTo:
Changes the center of the map to the given LatLng. If the change is less than both the width and height of the map, the transition will be smoothly animated.
which implies that if that change is not less than the dimensions of the map, the transition won't be smoothly animated. The other pan methods are similar.
You could try moving in multiple steps but that's a bit of a hack and I suspect the result will be poor.
Sorry that's not very helpful (I have the same problem).
For me this method works, but i'm using Google Maps API v2.
LatLng latLng = new LatLng(lat,lng);
map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, ZOOM_FACTOR));
This animates the camera from current position to the new one.
If you are using Gmaps API V2, then you can implement smooth animated move very easily by using panBy() method. You have to use fromLatLngToContainerPixel() method to find the amount of pixels to pan by.
Here is the bit of code:
var newLoc = map.fromLatLngToContainerPixel(new GLatLng(lat, lng));
map.panBy(new GSize( newLoc.x, newLoc.y ));
However, what I am trying to do is to achieve the same thing in maps API V3, but sadly fromLatLngToContainerPixel() method does not work anymore the way it did :(