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RE: [udig-users] Some uDIG use issues
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Thanks Jody,
I'll have to monitor what I do carefully so I can ask "what the?" type
questions and describe the scenario more fully.
I can't see (logically) how to add/edit multi-part shapes. Do you trace
one and hold the shift or control key down for the others ??? Yes I have
turned the "Advanced Editing" on, but there doesn't seem to be any
additional tools added (should there be?). What I am trying to do is
(for example) add a "set of points" as a single shape record (I don't
want to mix shape types). This could be a distribution record for a
weed. We do them as groups to simplify the workflow. We do a similar
thing for Burn Proposals (Planned Burns) where the users add a number of
polygon as one shape (ie. A multipolygon) record.
I have in my mind that we would use external services like WMS/WFS to
provide core datasets like park boundaries, contours, etc via GeoServer.
I can send you an example of the data if that would help (it's a very
wide shapefile with 200 columns or so). It is this way to cater for a
relational set of data within one table.
I went thru the old walkthrough 2 (dated Nov 2006) and have had a flick
thru the Jan 2008 one (ie I haven't done it tho). I can't see a
reference to adding a multipart shape (except via a copy/paste from the
Tassie example).
I haven't seen the Axios editing tools so I'd need to look at how to
install these.
As far as forms go we would have something of the order of 20 - 30
forms, so going on your suggestion we would do these as vanilla
flavoured Java forms (JWT?).
I guess in an ideal development world we would review the functionality,
chuck out what we don't need and include/extend what we do. Hopefully we
could reduce the footprint down as it is very hefty to fit into an
installable package over a satellite connection (we'd have to snail mail
them a CD possibly).
Ohh ...I like the idea of "fail over" services, that would be really
schmick. Appropriate for our cruddy service quality and availability.
Anything to improve the users experience.
Cheers,
Shaun
-----Original Message-----
From: Jody Garnett [mailto:jgarnett@xxxxxxxxxxxxxxx]
Sent: Wednesday, 21 May 2008 10:29 AM
To: Shaun Kolomeitz
Cc: udig-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [udig-users] Some uDIG use issues
Shaun Kolomeitz wrote:
>
> I'd like to ask a question of other uDIG users about the stability of
> the product in general.
>
Welcome :-)
>
> On several occasions
>
Okay lets go through them one at a time...
>
> I have had uDIG do something unexpected.
>
> Sometimes the WMS service (eg NASA JPL OnEarth) doesn't load (granted
> this isn't a uDIG issue necessarily).
>
The JPL WMS is not always working; but generally is pretty good.
>
> Other times it just locks up and won't redraw. Mostly I find certain
> parts frustrating in trying to nut out intuitively.
>
If you can give me any more information here it would be good; every
time the application locks up it represents a mistake on the part of
programmers like myself; any work that is making use of external
services should be done as a "Job", if you remember walkthrough 1 it
pointed out the "Process View" that you could open to look at what jobs
were currently happening; such as rendering.
If I am working with an external service that is slow; or acting up, I
occasionally will shut off that layer and open the Process view to stop
any outstanding requests uDig is waiting on, and then look for a better
service. Supporting "automatic" fail over would be a good idea for the
future; but it depends on knowing a bit more about the data then I do
right now...
Of course if the application is locked up you cannot get to the Process
view; so I would like to ask very carefully - is the application locked
up? Or just the rendering ...
>
> This is someone with many years of ArcView 3 experience and ArcMap as
> well.
>
> I am also trying to figure out how to add multi-part shapes, and for
> the life of me I can't figure it out.
>
What do you mean by multi part shapes? Do you mean a Multi-polygon? Or
do you mean a feature with more than one Geometry (say a Polygon and a
Point). You may need to turn on "advanced" tools in order to accomplish
this, it is a settings in the preference menu.
For uDig 1.1.0 we have focused on getting edit tools at all; some of the
more advanced options we have turned off (using this preference setting)
and left as an experiment for interested users.
If you have made it through the Walkthrough 2 tutorial on our website
you will have a very good idea of what editing functionality is solid
and tested for this release. While we do use more functionality than
this in our commercial projects based on uDig we have not always
included this in our sample uDig application.
>
> Our field staff have a need to trace (or import) multipart polygons
> and then cut donut holes in them (representing unburnt areas for
example).
>
Sounds fine; please explore the advanced editing tools (and the Axios
editing tools). If you find the functionality is not present to your
satisfaction talk to the members of udig-devel about getting it
implemented for your project. I have some documentation on how the edit
tools on the wiki ... but we can chat about that on udig-devel.
>
> The next step is to see how DBF data (part of the shapefile) can be
> presented in forms in uDIG.
>
This is covered as part of the training course (for Java developers I am
afraid); basically for your own application you make make a custom form
for each FeatureType. This can be exacting as needed, the choice of form
technology is up to you (your own custom view, or something generated).
I have been looking into the W3C XForms (originally an idea to represent
forms for XML applications) as it has been mentioned a couple of times
for Eclipse RCP:
- http://www.alphaworks.ibm.com/tech/vxd
- http://www.eclipsecon.org/2006/Sub.do?id=140
- http://www.javalobby.org/java/forums/t63868.html
But if your application only has 10s of forms I recommend just coding
them up in Java in order to pay careful attention attention to your
users needs. XForms may only be a "research opportunity" until we hear
otherwise.
>
> In the past we've found with ArcView 3 the more customisations you
> make, the more complicated and flaky the product becomes.
>
You will find uDig able to cope with growth; it is set up as a platform
for others to build on.
>
> As uDIG is one of the primary candidates for a wide release I'd like
> to make sure it is stable enough to recommend.
>
Fair enough.
>
> Obviously uDIG has showed great promise, otherwise I wouldn't even be
> asking.
>
Thanks for the questions,
Jody
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