Thanks Dave. That helped resolve my problem. Infact, styles within Layer can be ordered. I have now split different roads types into separate styles and referred to in the desired order.
Cheers Xin On 02/04/2008, Dave Stubbs <[EMAIL PROTECTED]> wrote: > > On Tue, Apr 1, 2008 at 8:54 PM, Xin <[EMAIL PROTECTED]> wrote: > > I am unable to order styles. I have a road layer which contains > motorways, > > trunk roads and residential roads. The residential roads are being > displayed > > on top of others. > > > > I have based my XML off OSM's config. > > > > Here is the core part of my config. > > > > <Style name="minor-roads-fill"> > > motorway rule > > trunk rule > > residential rule > > </Style> > > > > > > <Layer name="Roads" ..> > > <StyleName>minor-roads-fill</StyleName> > > shp data source ... > > </Layer> > > > > I have tried rearranging the rules within the style without any success. > > > > Can anyone help at all? > > > > > The style rule order will only effect the case where the same object > matches multiple rules -- the rules are then applied in file order. If > you have many objects and you want them rendered in a particular order > then you have to get the datasource to return them with the lowest > first, or render them as separate layers. > > In the default OSM setup the osm2pgsql import script adds a z_order > column, and sets residential roads to 1, motorways to 9, and other > roads in between, and adds a 10xlayer modifier if there is a layer > tag. The postgis datasource then has an "order by z_order" clause in > the table parameter -- this means lowest z_orders are supplied first > so are rendered at the bottom. > > > Dave >
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