[ka-Map-users] XML Points File

David Bitner osgis.lists at gmail.com
Wed Jan 11 12:41:30 EST 2006

At least for my uses, this would be limited to working off the same
server, so no proxy would be necessary.  Addition of a proxy could
just be a pretty generic php proxy that could be included as well for
those who need to access external "services".

On 1/11/06, Paul Spencer <pspencer at dmsolutions.ca> wrote:
> David,
> one problem with this is that you cannot load an XML document from an
> arbitrary URL.  Due to browser restrictions, you can only load it
> from the domain from which the page was loaded.  This really, really
> sucks and there is (almost) no way around it.
> There are two ways you could implement this:
> 1.  a server-side script (php or other) included with ka-Map or
> hosted on the same domain that redirects the request to the remote
> server, gets the response and returns it to the client.  I call this
> the proxy approach.  This would have to be done carefully as it could
> expose a security risk.
> 2. the other technique uses the fact that you can create a <script>
> element via document.createElement and it will load and execute
> javascript from remote sites (and this isn't a security risk!  go
> figure).  The downside is that it loads javascript, which probably
> isn't appropriate for what you are intending.
> Cheers
> Paul
> On 11-Jan-06, at 11:01 AM, David Bitner wrote:
> > I know that there has been some discussion on the list regarding
> > similar functionality to the markers in google maps.  I also know that
> > there is a good start in ka-map for adding points that will then pan
> > along with the map.
> >
> > I am looking to create a javascript function that takes a url of a
> > "service" and optionally a flag  to indicate that a bounding box
> > should be sent and a new request should be made for each map extent.
> > The "service" could then be either a script (php+postgis in my case)
> > or a file that returns either a delimited string or an xml string.
> > The return will indicate several points, each point will have an x and
> > y coordinate, a url to an image to be shown on the map, and optionally
> > html that will be included in a div that is used for mouseover events.
> >
> > Has anyone done anything along these lines already?  If not, are there
> > any features or specifications that I could include that would help
> > anyone else out?
> >
> > Thanks,
> > David
> >
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> > ka-Map-users at lists.maptools.org
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> >
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> |Paul Spencer                           pspencer at dmsolutions.ca   |
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