On Thu, Feb 17, 2011 at 1:33 PM, kimaidou <[email protected]> wrote: > > 2011/2/17 Carson Farmer <[email protected]> >> >> Perhaps 'Symbol layer ordering' or simply 'layer order'? > > I dislike "layer order" as it is confusing : do we speak of layers from the > canvas ? Or "style" layers ? > For me we should use the term "layer" in Qgis only for vector and raster > layers
Frankly, with the introduction of symbology-ng I have created some mess in the terminology and I am not sure how to get out of this. Where are the problems: - "style" - before the style referred to Layer style (i.e. renderer, labeling). symbology-ng uses this term for a collection of symbols (and other visual items) - "color ramp" - a convenient source of colors for symbology-ng. Shouldn't that be called a "colormap" since it could be either a color gradient, colors from a palette or just a bunch of random colors? - "layer" - there are map layers and there are symbol layers. I think that generally speaking, a layer always means a map layer. - "categorized" / "graduated" renderer - I remember Carson raising the discussion that these terms are not very clear An insight from a english native speaker and preferably a user of several GIS would be valuable. It would be good to disambiguate the terms. > Shouldnt we use a different terme for styles within one vector layer ? > We could name them "substyles" > This way "Symbol Levels" would become "substyle order" Personally I do not like the term substyle order. > So correct me if I am wrong, but you can define the order with 2 different > manners : > * A/ use the arrows in [1] (left side of the ui) to change the order of the > different styles > * B/ click on "symbol levels" and change the integers in the table : this > 2nd manner overwrite the first, no ? No, it is more complex. Normally when a renderer renders a map layer, for each feature it renders symbol layers one by one and proceeds to another feature. By enabling symbol levels you tell the renderer that it should first render first symbol layer of each feature and then render second symbol layer of each feature. The numbers in the symbol level table tell in what pass a symbol layer will be drawn (smaller number = drawing earlier). This probably needs a better introduction in a blog post or documentation with examples. Martin _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
