Re: Zooming in Applet with openmap

Hi Don,

It's what that plugin does.

*** The idea of the plug in looks great !!

> On the other may i know what (objects?) the LinkServer sends to a client
and
> what "Link"
> protocol is, so that i can customize LinkServer to a servlet .
The Link protocol is defined in the
com/bbn/openmap/layer/link/LinkProtocol.html document.

*** Is this supposed to be in the API javadoc? i couldnt find it there!
Also i would like to try out an example with LinkServer-Linklayer. I do
find
that there is an example to run the ShapeLinkServer(ShapeServerStarter)
but if i could have a client implementation then it would be great..
is there any client example available??
Also any rough guess on the what could be the size of the client in this
case??
(the openmap.jar is ~1Mb) .

rajesh.m

>
> Heloo Rajesh.M,
>
> The OpenMap applet can support what you are trying to do. Although with
> applets, you have to take care in choosing the source of your map data.
> Access to the client's local disk is forbidden, and some layers don't
> yet have the ability to use Java Resources as sources of data. That's
> where the Link package comes in. The
> com.bbn.openmap.layer.link.LinkLayer can communicate with a LinkServer
> to, among other things, get graphics to display for a given projection
> (zoom level, location, map size, etc). One more thing - the LinkServer
> has to be running on the same host that the applet was loaded from in
> order for the LinkLayer to contact it. Applet rules prevent an applet
> from contacting a machine other than the server host.
>
> If you want to hook OpenMap components to a servlet to create map
> images, check the com.bbn.openmap.image package, specifically the
> MapRequestHandler. If you want to see the MapRequestHandler used, the
> SimpleHttpImageServer uses it to create map images. If you start the
> SHIS and contact it on it's host and port, it will provide the format
> for a valid map request.
>
> Regards,
>
> Don
>
> > "Rajesh.M" wrote:
> >
> > Hi there,
> >
> > Greetings.
> > Iam a new user to openmap and need to figure out if my requirement is
> > possible.
> > I need to develop an applet which will display the geographical
> > map(say Political
> > map + ocean names + countries name) and over it display some objects
> > whose
> > properties(say colour) would change. My problem is i have to support
> > "zoom in"
> > for a selected area on the map. I want to know if i could do this with
> > openmap?
> > I took deep look at the mailing archives and found that there is a
> > package
> > "com.bbn.openmap.layers.link", from what i understand could be used to
> > "transfer graphic
> > objects between a ClientLink and a Linkserver over socket" am i on
> > the right track?
> > is it possible with these classes to reply back with the new
> > geographical map for the
> > x/y co-ordinates area selected for zoom
> > . If so is it possible to make the Linkserver a servlet and transfer
> > the data over HTTP? Would be glad to get a help and detailed reply
> > with information on using "Link"
> > package.
> >
> > Thx
> > Rajesh.m
>
> --
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Donald Dietrick dietrick@bbn.com (617)873-3031 [FAX]4328
> BBN Technologies, 10 Moulton Street, Cambridge, MA 02138
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