vector editing summary

[Cameron Shorter]

Yes Anselm, I suggest working in Paul's directory. (I assume that is OK 
with Paul?)

And use the design from the UML diagrams as the master.
At the moment, focus on the Graphics code.

I'm struggling with how to handle Geometry at different scales.
How do you describe a feature using a different FeatureCollection for 
each zoom level.

I've raise the issue on the OWS Context email list and it seems that 
this problem has not been resolved properly in Context, WFS, and 
possibly even GML specs.

Anselm Hook wrote:
> I'd like to be able to play with some code a bit - should i use the 
> stuff here:
> 
> http://svn.openlayers.org/sandbox/pagameba/vector/lib/OpenLayers/Vector.js
> 
> Or should I use pauls stuff which may be elsewhere?
> 
> I wouldn't mind roughing out some of camerons framework and then
> playing with some canvas based implementations of the abstractions for
> fun...
> 
> - a
> 
> On 10/31/06, Cameron Shorter <cameron.shorter at gmail.com> wrote:
> 
>> Paul, Anselm,
>> I haven't updated as much of the design as I hoped. Other priorities got
>>   in the way.
>>
>> I've primarilly only updated the Graphics code.
>> I've changed the names slightly to align with GO-1 naming convensions.
>> (A Java standard API)
>>
>> I've re-introduced a Factory.
>>
>> The key API will be the Canvas object.
>>
>> I'll be back onto this tomorrow. (your afternoon)
>>
>> Paul Spencer wrote:
>> > Cameron, here is my non-uml version of where I think we could go with
>> > the design/architecture.  I think this allows for a lot of  flexibility
>> > but is reasonably easy to understand.
>> >
>> > Lemme know what you think ...
>> >
>> > Cheers
>> >
>> > Paul
>> >
>> > --
>> >
>> > Graphics
>> > Graphics.Point
>> > Graphics.Line
>> > Graphics.LineSegment
>> > Graphics.Polygon
>> > Graphics.Circle
>> >
>> > Graphics represents graphic primitives.  Graphic primitives deal
>> > directly in pixel coordinates and know nothing about the spatial
>> > objects they represent.
>> >
>> > Vector
>> > Vector.Point
>> > Vector.Line
>> > Vector.Polygon
>> >
>> > Vector encapsulates a geo-spatial feature.  Vector objects can create
>> > Graphics primitives to use for rendering.  A Vector object can also  be
>> > initialized from a Graphics object to aid in digitizing new  features
>> > and editing existing features.
>> >
>> > Style
>> > Style.PointSymbolizer
>> > Style.LineSymbolizer
>> > Style.AreaSymbolizer
>> >
>> > Style is a general description of how to render a specific type of
>> > Vector feature.  Styles can be associated with a Layer or with
>> > individual Vector objects.  Style is used by the Renderer to create a
>> > visual representation of a Vector
>> >
>> > Renderer
>> > Renderer.Graphic
>> > Renderer.Graphic.Canvas
>> > Renderer.Graphic.SVG
>> > Renderer.Graphic.VML
>> > Renderer.WKT
>> > Renderer.GML
>> >
>> > Renderer is a generic virtual vector rendering interface.  Only
>> > specific subclasses of Renderer can be instantiated.  A vector layer
>> > uses the renderer to render its Vector objects into some output.  The
>> > main use is to render a graphic representation of a Vector feature.
>> > However, Renderers can also produce string representations such as  WKT
>> > and GML.
>> >
>> > Layer
>> > Layer.Vector
>> > Layer.Vector.GeoRSS
>> > Layer.Vector.WFS
>> >
>> > A Layer.Vector is a generic vector rendering layer.  It manages an
>> > array of Vector objects.  Sub-classes of Layer.Vector provide direct
>> > access to vector data via a specific protocol like GeoRSS or WFS.
>> >
>> >
>> > +-----------------------------------------------------------------+
>> > |Paul Spencer                          pspencer at dmsolutions.ca    |
>> > +-----------------------------------------------------------------+
>> > |Chief Technology Officer                                         |
>> > |DM Solutions Group Inc                http://www.dmsolutions.ca/ |
>> > +-----------------------------------------------------------------+
>> >
>> >
>> >
>> >
>> >
>>
>>
>> -- 
>> Cameron Shorter
>> http://cameron.shorter.net
>>
> 


-- 
Cameron Shorter
http://cameron.shorter.net