Maybe this pic helps elaborate on what i'm trying to accomplish: <a href="http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png">http://fileshare.myroute.be/exchange/asymmetriclinedrawing.png</a><br>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.<br>
<br>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 :).<br><br><br><div class="gmail_quote">
On 12 August 2010 16:28, Wim Vanbelle <span dir="ltr"><<a href="mailto:wimvanbelle@gmail.com">wimvanbelle@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hello,<br><br>thanks for your feedback.<br><br>The issue with this, is that the underlying linestrings (the 2 that would lie on top of eachother), have different colors :(.<br><br>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.<br>
<br>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).<br><br>I can elaborate on the problem more if I am a little too confusing !<div>
<div></div><div class="h5"><br>
<br><br><div class="gmail_quote">On 12 August 2010 16:20, Cristiano Sumariva <span dir="ltr"><<a href="mailto:sumariva@gmail.com" target="_blank">sumariva@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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.<br><br><div class="gmail_quote">2010/8/12 Wim Vanbelle <span dir="ltr"><<a href="mailto:wimvanbelle@gmail.com" target="_blank">wimvanbelle@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div></div><div>Hi David,<br><br>I read that documentation before though. I was hoping it just hadn't been updated... Is this possibly a feature for 6.0 ?<br>
<br>Are there any other ways how one could offset a feature in pixels, rather than in lat/long coords?<br>
<br>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.<br>
<br>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.<br>
<br>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.<br><br>Maybe some veterans have some good insight in this :).<div><div></div><div><br><br><div class="gmail_quote">On 12 August 2010 15:26, Fawcett, David (MPCA) <span dir="ltr"><<a href="mailto:David.Fawcett@state.mn.us" target="_blank">David.Fawcett@state.mn.us</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Wim, </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">If you don’t want me to tell you, you will likely want to look
at the mapfile documentation at: <a href="http://mapserver.org/mapfile/style.html" target="_blank">http://mapserver.org/mapfile/style.html</a></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">[Spoiler Alert]</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">You can’t use values from an attribute table to set the value of
this property</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">[/Spoiler Alert]</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">David.</span></p>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:mapserver-users-bounces@lists.osgeo.org" target="_blank">mapserver-users-bounces@lists.osgeo.org</a>
[mailto:<a href="mailto:mapserver-users-bounces@lists.osgeo.org" target="_blank">mapserver-users-bounces@lists.osgeo.org</a>] <b>On Behalf Of </b>Wim
Vanbelle<br>
<b>Sent:</b> Thursday, August 12, 2010 5:48 AM<div><br>
<b>To:</b> <a href="mailto:mapserver-users@lists.osgeo.org" target="_blank">mapserver-users@lists.osgeo.org</a><br>
</div><b>Subject:</b> [mapserver-users] Offset values from database</span></p>
</div><div><div></div><div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Hi, <br>
<br>
I'm trying to load offset X, Y data from the postgis database.<br>
<br>
Each feature has an offset value defined there.<br>
<br>
My mapfile (relevant part) looks like this:<br>
<br>
In the layer:<br>
DATA
"geom_mercator from map_links using unique Id using SRID=900913"<br>
<br>
STYLE<br>
WIDTH 6<br>
COLOR 0 255 0<br>
ANTIALIAS TRUE<br>
ANGLE AUTO<br>
OFFSET [offsetX] [offsetY]<br>
END<br>
<br>
Please don't tell me the offsetX, Y values cannot be read from the database.
That would be a huge issue for me.<br>
<br>
Thank you for your time.<br>
<br>
Best regards</p>
</div></div></div>
</div>
</blockquote></div><br>
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</blockquote></div><br>
</div></div></blockquote></div><br>