Geo fence

[Samuel Ndhlovu]

Has anybody had success using leaflet for geofence?if so please help me with examples if possible.I will be grateful.

[ba...@redbird.fr]

Hi, it's possible.

You can simply compare marker lat-long to rectangle bounding box for example.

[samuel ndhlovu]

am a newbie developer,can you give me an example of how this can be done?

--

---
You received this message because you are subscribed to a topic in the Google Groups "Leaflet" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/leaflet-js/ehfPFyaDyHk/unsubscribe.
To unsubscribe from this group and all its topics, send an email to leaflet-js+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[ba...@redbird.fr]

It should be something like that:

markerLatLng = myMarker.getLatLng();

rectSouthWest = myRect.getBounds().getSouthWest();

rectNorthEast = myRect.getBounds().getNorthEast();

if(  (markerLatLng.lat > rectSouthWest.lat && markerLatLng.lng > rectSouthWest.lng) && (markerLatLng.lat < rectNorthEast.lat && markerLatLng.lng< rectNorthEast.lng) ){
  alert("you're in");
}else{
  alert("you're out");
}

I'm pretty sure that you can find solutions in a plugin like this one.

Some doc to help you:

http://leafletjs.com/reference.html#marker

http://leafletjs.com/reference.html#rectangle

http://leafletjs.com/reference.html#latlngbounds

http://leafletjs.com/reference.html#latlng

Good luck!

[Arnie Shore]

Let me note that if your fence is rectangular, then this can work.  But if it's more complex, like a geographic boundary, then you'll need some sort of point-in-polygon logic.

On Fri, Oct 23, 2015 at 4:57 PM, Samuel Ndhlovu <ndhlov...@gmail.com> wrote:

Has anybody had success using leaflet for geofence?if so please help me with examples if possible.I will be grateful.

--

---
You received this message because you are subscribed to the Google Groups "Leaflet" group.
To unsubscribe from this group and stop receiving emails from it, send an email to leaflet-js+...@googlegroups.com.

[ba...@redbird.fr]

Yes, this method only work for rectangle fence. With an other kind of polygon it could be wrong :

In this sample, the point is in the bounding box (yellow) but not in the polygon (red).

[Matt Travis]

Have you tried this: http://mapbox.github.io/leaflet-pip/

[Steve Mitchell]

Samuel, I build this demo for you. https://exploringspatial.wordpress.com/2015/11/29/privacy-geofencing/