Its fairly easy.
These are the steps:
1. Set up OL map (I assume you have this)
2. Read data from GPS
3. call map.setCenter with the GPS data
Step 2 varies, depending on the GPS brand.
Usually you can tweak the device to put out NMEA compliant data on a COM
port.
NMEA is human readable, and specs can be found online.
Step 3 may cause trouble, because you have to interact with a javascript
inside a page.
On way is to simply host the page in an application, ie. a .Net form,
then the access is there.
Another way is to create a webservice / micro webserver that returns the
current position.
A javascript inside the page can then poll the position (via AJAX), and
update the center.
You may run into trouble if your map is projected into something thats
not Lat/Lon compatible.
In that case, take a look at the Proj.4 library, avalible for both
javascript and regular programming.
Regards, Kenneth Skovhede, GEOGRAF A/S
Didrik Pinte skrev:
Hi,
One of my client asked me if it was possible to control the center of an
openlayer map by an external GPS connected to it's laptop ...
I have googled a bit about this but found nothing.
Does anybody have an interesting suggestion ? link ? idea ?
Thanks
Didrik
------------------------------------------------------------------------
_______________________________________________
Users mailing list
[email protected]
http://openlayers.org/mailman/listinfo/users
_______________________________________________
Users mailing list
[email protected]
http://openlayers.org/mailman/listinfo/users
