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Re: [udig-devel] Arcs, Parallels, Dissolve, Spatial Join Geometries
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Hi Jody:
Well, our first goal will be to provide a tool to do easier drawing Arcs of
circle. We know that the existed geometry model implementation has limitation
to support arcs. Then we are dealing with this limitation waiting that arcs
can to be supported by geotools.
Thus arc tool is only a way to see a linestring for udig.
We are thinking in following tools:
1- Arc Creation
Preview: interactions to draw arc of circle preview.
Precision: quantity of segments required to make the arc
Transaction: stores the feature as LineString
The last sentence is clearly a limitation and has got the following
consequence: we can not distinguish between arcs and linestring. Then we need
the following tool.
Arc Modification:
This tool handles a selected linestring as arc (arc with infinite radius).
Thus, we will be handling linestrings as arcs waiting for ISO Geometry
implementation.
Do you think there are risks or problems with this strategy?
--
Mauricio
www.axios.es
On Thursday 31 May 2007 20:17, Jody Garnett wrote:
> Understood.
>
> For WFS 1.1 support I think Justin whipped up his own Arc class - he
> only needed to punt the data around not perform operations with it.
> PostGIS has some basic support for Curve now - I am not sure if that
> made its way into JTS or not?
>
> There is also the ISO Geometry implementation (gasp) which will not be
> ready for a for a couple more months.
> Jody
>
> > Yes, we do. We are thinking in an approximation to Arc using JTS
> > LineStrings.
> >
> > LineString
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
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