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Re: [udig-devel] missing prj files
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Hi Jesse,
> If the layer to be added does not have any projection info and the map
>
> has a projection we should:
>
> 1) complain loudly
>
> 2) allow users to presume the layer matches the map 'in this project'
>
> 3) ?ADVANCED? Give users a way to write the matching projection info
>
> I also like the third action, because it gives me the feeling that it
>
> also "educates" the user to take care of the projection.
>
> I don't like #3 because it is NOT userfriendly. Remember we are supposed to
> use intelligent defaults and get the heck out of the users way.
> I just did some research using ArcMap, Gaia and MapInfo. ArcMap provides
> one warning for the first unprojected layer added and that's it. It also
> shows a warning if you add a layer that is a different projection.
> Gaia does what uDig does. If the map has projection it otherwise it will
> show the layer or not depending if the natural coordinates allow it.
> MapInfo requires that you specify a CRS but the program isn't the easiest to
> use so I'm not sure I want to model after that :).
> QGis - Doesn't use auto projection automatically so users would be used to
> things lining up if they are in the same SRS or not if they are not.
> ArcView - No warnings. Basically the same as Gaia
>
> I did find one BIG bug with uDig. There is a problem transforming To and
> From Generic. It is a pretty critical bug for me. The idea was that
> Generic would just go through. But it doesn't seem to do that. If the map
> is generic and a layer has a CRS it seems to always reproject to LatLong.
> If the map is any CRS and a layer is undefined it never renders!!!.
> I'm working on this right now. it should REALLY help.
Oh yes, I think that is part of the problem.
Also good you did those tests, thanks,
Andrea
>
> Jesse
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
