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Posted by Philippe on August 9, 2007, 2:41 am
Hello Jani,

Ever had a look at Geoserver's Tasmania example with uDig as client ?

This WFS-T example might interest you.

Regards

46b2d50b$0$3192$9b536df3@news.fv.fi...
> Paul Cooper kirjoitti:
>> wrote:
>> The point about MapBuilder and WFS-T is that they allow remote
>> modification of data. If you really want to modify or create spatial
>> objects in the browser, then this is the starting point you need to
>> work from. As I noted before, the BIG problem is that your browser is
>> unaware of the complexities of spatial reference systems, and without
>> that you don't have a working system.
> Yes they do, but now I'm not interested in servers. I'm just interested in
> clients. And that is big problem but not for reasons you mentioned.
>> You must also have interaction with a server; otherwise how are you
>> going to store your data? The security model of browsers doesn't
>> normally allow modification of local files.
> I'm obviously not making myself clear here. :)
> At this point I'm not interested in technology/protocols etc. about data
> transfer between browser (client) and server. WFS-T is still just one open
> (standard) protocol to do it.
> All I'm looking for is a tool that can show raster/vector map and you can
> draw points, lines (polygons) and circles on top of it and post it back to
> _any_ server that implements _any kind of saving method_
> Most of implementations I've seen this far can only handle points. You can
> set POI on map and maybe even save it (to datastorage). All of those seem
> to use some kind of proprietary protocol. That's just what MapBuilder
> samples seem to do. you can make POI. But where you can draw areas for
> example?
> I've myself implemented applet that can be used to digitize and save
> geometries to datastorage - it doesn't use WFS-T nor mapserver but my
> proprietary server and protocol. It's just very clumsy to use and needs
> java to be installed on end user machine.
> I've seen div (dhtml) based digitizing with AJAX. It uses also proprietary
> server and protocol. Problem is slowness - creating lines using divs is
> more than slow.
> I've studied possibility to use SVG DOM object to handle vector data (from
> server or drawn) but I haven't found any implementations that would do
> such things.
> Also I'm looking for possible implementations using digitizing with
> flash/flex technology.
> For decades we have had desktop clients for creating and modfuing GIS
> data, but I'm really looking ways to do it on web, currently this seems
> very good oppurtunity for OSS project since not many exists.
> --
> Jani Tiainen



Posted by Jani Tiainen on August 9, 2007, 5:33 am
Philippe kirjoitti:
> Hello Jani,
>
> Ever had a look at Geoserver's Tasmania example with uDig as client ?
>
> This WFS-T example might interest you.

Not sure about that particular example but both products I've tested.

I though uDig was desktop client (Java based), not some thing you use
inside browser?

Second thing is that WFS-T is maybe not suitable for complex data that
I'm using, specially with Geoserver which really buggy with Oracle.

I'm starting to be really convinced that I'm stepping to unknown
territory. Solutions don't yet exists. I have to figure out one then.

--

Jani Tiainen

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