[Gvsig_english] symbols

[jaume domínguez faus]

Hello again!

pvmstg wrote:
> Hi,
>
> Great work developpers.  It's look like you include all the need for 
> modern symbo in a easy way.   The video doesn't show it but,  I hope 
> you can put symbology base on many field criteria (arcmap offer 3 but 
> more could be verry helpfull).
Well, the set of symbols applied to a layer is a task performed by what 
we call a "legend", in other systems it is called "renderer", or 
"filter". The next version will allow to plug as many as new types of 
legend as desired. As part of the shipped version, we'll include the 
already existing "single symbol", "unique value legend", "dot density 
legend", and "interval legend", but also the new ones "proportional 
symbols legend" (2 variable), "graduated symbols legend" (2 variable), 
"quantity by category legend" (2 variable), "graphic legends" (n 
variable), "expression legends" (n variable)...
>
> If we can set the size of the symbols to a reference scale...
At the moment in the developing code, there are two ways of sizing 
symbols (well, in fact three).

1. You can set the size of the symbol in an amount of pixels. So, your 
map will be rendered directly with this amount of pixels.

This is intended for projects whose main purpose is to make spatial 
analysis or for publishing services to map servers (see the publishing 
extension by José Vicente Higón) where either there is no need to print 
map layouts or the target server does not support other symbol sizing 
than pixels.

2. You can set the size of the symbol in an amount of one of the gvSIG 
supported units (say kilometers, miles, meters, yards, inches, 
millimeters, etc..) and in rendering time the symbol will be scaled 
according on the reference system selected. The reference systems 
already coded are:

    a) real world reference system. Where a meter in the symbol size 
represents a meter in the real world. So, the closer zoom you have the 
bigger symbol become. Intended for engineering tasks.
    b) paper reference system. Where the unit scaled to the distance in 
the map layout (or even screen). This means that if you want a symbol to 
be say 2cm length, it will be drawn at this size in the screen, in the 
paper, no matter the zoom. It is calculated based in the DPI 
(dots-per-inch) in the current rendering context. This is intended for 
map producing tasks
>
> Also, like I ask before, can we be able to export these labeling to an 
> annotation class for faster rendering and edition.
Yes, as I wrote in the previous mail, the annotations will export all 
the new features and enable edition capabilities as they are native 
geometries in native layers.
>
> If, in the future you could also make these annotation manualy 
> ajustable...  You can't always have the best location of annotation 
> so, beeing able to edit labeling to manualy place them  could be verry 
> usefull.
Of course!
>
> I ask before but, no answer.  Since esri is moving to file geodatabase 
> and plan to release and api for that I hope gvsig project will include 
> it's support as soon as possible.
Sorry, I cannot answer this.
>
> Thanks again... waiting for the next release..
>
> Marcel
>
>
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Hope the work will be useful.
Salut!

-- 
Jaume Dominguez Faus

Equip gvSIG 

Web Map Service
Web Coverage Service 
Web Map Context
Simbologia Avançada
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