Thank you very much everyone. And especially Thomas. That was indeed what I was looking for. You saved me a lot of work!
Much appreciated. On 12 August 2010 17:50, Fawcett, David (MPCA) <david.fawc...@state.mn.us>wrote: > Thanks Thomas > > That looks nice in my test example. > > David. > > -----Original Message----- > From: thomas bonfort [mailto:thomas.bonf...@gmail.com] > Sent: Thursday, August 12, 2010 10:45 AM > To: Fawcett, David (MPCA) > Cc: Wim Vanbelle; mapserver-users@lists.osgeo.org > Subject: Re: [mapserver-users] Offset values from database > > the -99 is a special offset value that shifts the line as you are looking > for. > > style > color 255 0 0 > offset -2 -99 > width 2 > end > style > color 0 255 0 > offset 2 -99 > width 2 > end > > > not perfect as there are artifacts on sharp angles, but worth a try. > > regards, > thomas > > On Thu, Aug 12, 2010 at 16:56, Fawcett, David (MPCA) > <david.fawc...@state.mn.us> wrote: > > Wim, > > > > > > > > You can do these offsets in pixel values at a class level, just not a > > feature level. This pretty much does what you are describing, although > it > > gets a little funky when the lines are diagonal and not straight. > > > > > > > > CLASS > > > > STYLE > > > > COLOR 0 0 0 > > > > WIDTH 2 > > > > END > > > > STYLE > > > > COLOR 255 0 0 > > > > WIDTH 2 > > > > OFFSET 10 10 > > > > END > > > > STYLE > > > > COLOR 0 255 0 > > > > WIDTH 2 > > > > OFFSET -10 -10 > > > > END > > > > > > > > END > > > > > > > > David. > > > > > > > > From: mapserver-users-boun...@lists.osgeo.org > > [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim > Vanbelle > > Sent: Thursday, August 12, 2010 9:32 AM > > To: mapserver-users@lists.osgeo.org > > Subject: Re: [mapserver-users] Offset values from database > > > > > > > > Maybe this pic helps elaborate on what i'm trying to accomplish: > > http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png > > It should be noted that the distance between the 2 (new) lines, should be > a > > fixed value over the zoomlevels. It must not be the case that at the > > furthest zoomlevel the lines are further apart. > > > > I've looked all over for this, but never really found a proper solution. > I > > tried cartographic symbol drawing, but it only draws on the same side > every > > time. Maybe I'm just doing it wrong :). > > > > On 12 August 2010 16:28, Wim Vanbelle <wimvanbe...@gmail.com> wrote: > > > > Hello, > > > > thanks for your feedback. > > > > The issue with this, is that the underlying linestrings (the 2 that would > > lie on top of eachother), have different colors :(. > > > > So they have to be moved apart from one another. I have not found a way > to > > do this with asymmetric line drawing either, as it will always offset to > the > > same side. > > > > This is why i would need the offset value to be configurable in the > > database. I could select a different pixel offset for each line and they > > would always appear next to eachtoher (no matter what zoomlevel). > > > > I can elaborate on the problem more if I am a little too confusing ! > > > > On 12 August 2010 16:20, Cristiano Sumariva <sumar...@gmail.com> wrote: > > > > If it is a display problem why not try create some special symbology to > > overlap one line with another using different symbol strokes. So the user > > will se that are 2 lines overlayed. > > > > 2010/8/12 Wim Vanbelle <wimvanbe...@gmail.com> > > > > Hi David, > > > > I read that documentation before though. I was hoping it just hadn't been > > updated... Is this possibly a feature for 6.0 ? > > > > Are there any other ways how one could offset a feature in pixels, rather > > than in lat/long coords? > > > > Maybe I should elaborate on the original problem a little. Consider 2 > line > > segments that lie above one another. The general idea is to 'offset' them > a > > given x , y value, so they will both display next to one another, rather > > than on top of eachother. > > > > If you would however perform this code simply on lat/long values, it > would > > imply, that when scaling your map at the most detailed zoom level, the > lines > > would lie very far apart, and when zoomed out, they would appear to lie > on > > top of eachother. > > > > I find it hard to believe that I would need to pre calculate all the data > in > > order to obtain geometry objects for each zoom level. > > > > Maybe some veterans have some good insight in this :). > > > > > > > > On 12 August 2010 15:26, Fawcett, David (MPCA) < > david.fawc...@state.mn.us> > > wrote: > > > > Wim, > > > > > > > > If you don’t want me to tell you, you will likely want to look at the > > mapfile documentation at: http://mapserver.org/mapfile/style.html > > > > > > > > [Spoiler Alert] > > > > You can’t use values from an attribute table to set the value of this > > property > > > > [/Spoiler Alert] > > > > > > > > David. > > > > From: mapserver-users-boun...@lists.osgeo.org > > [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Wim > Vanbelle > > Sent: Thursday, August 12, 2010 5:48 AM > > > > To: mapserver-users@lists.osgeo.org > > > > Subject: [mapserver-users] Offset values from database > > > > > > > > Hi, > > > > I'm trying to load offset X, Y data from the postgis database. > > > > Each feature has an offset value defined there. > > > > My mapfile (relevant part) looks like this: > > > > In the layer: > > DATA "geom_mercator from map_links > using > > unique Id using SRID=900913" > > > > STYLE > > WIDTH 6 > > COLOR 0 255 0 > > ANTIALIAS TRUE > > ANGLE AUTO > > OFFSET [offsetX] [offsetY] > > END > > > > Please don't tell me the offsetX, Y values cannot be read from the > database. > > That would be a huge issue for me. > > > > Thank you for your time. > > > > Best regards > > > > > > > > > > > > _______________________________________________ > > mapserver-users mailing list > > > > mapserver-users@lists.osgeo.org > > > > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > > > > > > > > > > > > > > > _______________________________________________ > > mapserver-users mailing list > > mapserver-users@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > > > > >
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