I am using google maps API for searching houses in a city(any location). In maps, by default markers will be loaded based on database results and user need to select locations they are interested. If user draws multiple polygons around markers, those markers should be visible and other markers should become invisible. I almost done most part of it.
Now the issue is,when i draw multiple polygons, only one marker with one polygon is visible. Other selected markers are getting invisible. I am trying from past two days and able to get it done. Can anyone guide me to fix this issue.
Mentioned issue is kept in jsfiddle, have a look and let me know
Add at the end of your drawFreeHand method: polygons.push(poly);
And change your isPointInside method as below.
function isPointInside(position){
for(var i=0;i<polygons.length;i++)
{
if(google.maps.geometry.poly.containsLocation(position, polygons[i]))
return true;
}
return false;
}
You were comparing with the same poly, that was the problem.
Related
I am having google static map url this way with multiple markers.
https://maps.googleapis.com/maps/api/staticmap?size=1100x795&markers=color:red|label:S|45.459041,-98.430198&markers=color:red|label:S|45.469042,-98.430199&markers=color:red%7Clabel:S%7C40.702147,-74.015794&markers=color:red%7Clabel:G%7C40.711614,-74.012318&markers=color:red%7Clabel:C%7C40.718217,-73.998284
But in the map only 2 markers are shown.
I have even tried adding these parameters in the url but still it showing only 2 markers in my map.
&maptype=roadmap
&sensor=fasle
What is the mistake here? can some one help me?
Thanks
It is because of the distance of the markers. The first two markers are near each other and the other three is also near each other, but the first two markers are relatively far from the latter three. I tried getting the Static maps separately and making separate requests for the first two and the latter three and it displays the markers accordingly. I guess because of the distance the markers overlapped.
fiddle of Google Maps Javascript API v3 map showing the same markers (navigate to the markers to see what is happening)
Request for the first two:
https://maps.googleapis.com/maps/api/staticmap?size=1100x795&markers=color:red|label:S|45.459041,-98.430198&markers=color:red|label:S|45.469042,-98.430199
Request for the latter three:
https://maps.googleapis.com/maps/api/staticmap?size=1100x795&markers=color:red%7Clabel:S%7C40.702147,-74.015794&markers=color:red%7Clabel:G%7C40.711614,-74.012318&markers=color:red%7Clabel:C%7C40.718217,-73.998284
I have multiple addresses on the same street with the same house number, but with different apartment numbers. Google Maps Geocoding Service (v2) doesn't go down to apartment level accuracy for many addresses and just returned me the exact same geocode coordinates for them.
So the problem is that when I go to display them, only one pushpin shows up no matter how much you zoom in. And my question is; what is a good way to render multiple pushpins at the exact same house address? I've seen how craigslist.org creates a spiral out of the pushpins on their new map feature, but was wondering what my other options are as that seems like a workaround at best.
Ideas?
I solved this using Google's dynamic chart icons which allow you to put a number in the pin identifying that there are multiple markers on this exact some point. Basically, you call their "chart" url with some query params and they give you back your numbered icon which you can then place/set in the existing marker you have on that spot.
var markerImage = createMarkerImage(numDuplicates + 1);
existingMarker.setIcon(markerImage);
function createMarkerImage(text)
{
var pinImage = new google.maps.MarkerImage("http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=" + text + "|FF8985|000000",
new google.maps.Size(21, 34),
new google.maps.Point(0,0),
new google.maps.Point(10, 34));
return pinImage;
}
NOTE: This solution uses a deprecated google API with no end date posted.
"Important: The Image Charts portion of Google Chart Tools has been
officially deprecated as of April 20, 2012. It will continue to work
as per our deprecation policy."
UPDATE:
I have moved away from the above solution since it's deprecated (and has performance impact for many markers) in leiu of the same end effect of a numbered marker, but using a path of coordinates defining polygon in the shape of a marker along with a .png for the marker shadow. Only reason I used my own custom marker is because I needed to create individual markers, each with a unique color (and possibly an embedded number), which the vanilla markers don't support.
I'm working on a project where, after creating some nice code for creating polygons and attaching mouse events to them, the addition of KML layers (mainly placemarkers) results in uncooperative behaviour between the placeholders of the KML layer and the generated polygons.
If I create the polygons first and set the KML file afterwards, clicking on the placemarkers brings up the infowindow () as expected. However, mouseovers on the polygons below yield no result, whereas before they get highlighted and are clickable (which they aren't).
Setting the KML layer to null doesn't help either. The placemarkers disappear, but my polygons aren't registering.
When I first call the KML with placemarkers, the polygon layer called later goes on top of the placemarkers. The polygons are opaque, so you can see the placemarkers like you could through a window, but you can't click or interact with the placemarkers.
Setting the polygons to null results in the same behaviour as before. Placeholders still cannot be clicked on.
Help? I couldn't find a zIndex reference for the KML layer code, and I'm hoping that's all it is. I read somewhere else - and imagine this to be true - that the KML and user-gernated content "layers" are conflicting with one another - the latter one that's put on the map takes focus, captures events, etc. I would've thought that it wouldn't matter, in the same way that you can have divs on top of other divs, especially if you use indexing.
If you simply want to display the information in the KML layer and not have it react to user events, you can add the suppressInfoWindows flag to the constructor:
var myKmlLayer = new google.maps.KmlLayer('http://gmaps-samples.googlecode.com/svn/trunk/ggeoxml/cta.kml', { suppressInfoWindows: true });
This will effectively shut off all interactions and let your other layers receive interactions.
Edit: Forgot to mention that a good source of information is the Google API V3 site discussing KML layers
I am wondering how I can create two markers on a google map (upon click) and have a line drawn between them. Ideally both markers would be draggable after they are initially dropped and the line would readjust accordingly.
Maybe you can check this example, though is already deprecated it might help you to get an idea
http://maps.forum.nu/gm_flight_path.html
I want to create an overlay on top of Google Maps that displays different streets in different colors.
In the Google Maps API it is possible to create markers and polygons that cover certain areas.
Is there a way to somehow mark different streets?
It sounds to me like you are interested in showing some application specific coloring for your Google maps display (rather than traffic maps).
If so , then you should check out custom overlays. You can create your own transparent background overlay tiles (with your colored streets), match them up with the Google maps tiles and then overlay them on the map. You can find a description of this stuff in the Maps API reference - Overlays.
I have actually been interested in trying this out, and this question might be a good excuse. I'll let you know how I go.
Edit: Ok, I tried this and it was pretty straightforward. You just need to grab the tiles images when the google maps page load (for the area you would like to overlay). Make sure you keep track of the origional urls, because these have the x,y coordinates that you will need to write your tile overlay method.
Edit the tiles with your colored roads then upload them to your web server. Add the following code to use your overlay on the regular map:
var myCopyright = new GCopyrightCollection("© ");
myCopyright.addCopyright(new GCopyright('Demo',
new GLatLngBounds(new GLatLng(-90,-180), new GLatLng(90,180)),
0,'©2007 Google'));
// Create the tile layer overlay and
// implement the three abstract methods
var tilelayer = new GTileLayer(myCopyright);
// properties of the tile I based my tile on
// v=w2.97&hl=en&x=38598&s=&y=49259&z=17&s=Galil.png
tilelayer.getTileUrl = function(point, zoom) {
if (zoom == 17 && point.x == 38598 && point.y == 49259)
return "../pics/times_square.png";
};
tilelayer.isPng = function() { return true;};
tilelayer.getOpacity = function() { return 1.0; }
var myTileLayer = new GTileLayerOverlay(tilelayer);
var map = new GMap2(document.getElementById("map"));
map.setCenter(new GLatLng(40.75740, -73.98590), 17);
map.addOverlay(myTileLayer)
This code overlays my Thing eats NY tile:
at x = 38598 and y = 49259 at zoom level 17.
It is possible to create markers and polygons in the Google Maps API. You need to create GPolygon and/or GPolyline objects
Have a look to these tutorials
And if you want to obtain the coordinate (latitude, longitude) of certain streets, you may have a look to the source code of this page
I am not sure to fully understand your question: do you want to mark some given streets ?
in that case, a quick-and-dirty way could be to get the coordinates of all the addresses of the street and build a GPolygon according to them...
Have you concidered using OpenStreeMaps?
Try digging into the code used to show the traffic overlay on the normal Google Maps site.
Edit: I just looked at the code, and it appears that even Google decided it was easier to implement this by just generating the traffic lines on the server and pulling them down as transparent PNG overlays.
I just found this link, and I think this could interest you. It is a JavaScript package that provides functionality for displaying multiple routes on Google Maps.
Is it what you were looking for ??