Regina,<div><br></div><div>Thanks. Unfortunately, I'm not <span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">going to make it Paris but next time your on the east coast I'll try to stop by (apparently I completely missed the event in DC last month).</span></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">Is the Paris Sprint likely to result in a decision about GEOS/Boost/CGAL/PostGIS core/etc.? Or is it a longer term discussion than that?</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">In the meantime, looking through the ticket list, there's a couple tickets (#430 and #428) that look interesting and I'd like to make a stab at. What's the proper etiquette for doing so?</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">Thanks</font></div><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif"> - Sam</font></div>
<div><br><div class="gmail_quote">On Wed, May 2, 2012 at 4:22 AM, Paragon Corporation <span dir="ltr"><<a href="mailto:lr@pcorp.us" target="_blank">lr@pcorp.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<u></u>
<div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Sam,</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Sam,</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Not to my knowledge. There are a couple of hurdles we
need to jump before that step.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">The big one:</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">GEOS is predominantly 2-D engine: PostGIS buffer and
many other functions piggy -back on that.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">so the big question is whether to expand GEOS to handle new 3d
types thus deviating more from its JTS roots or use another engine like Boost or
CGAL.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">The other option is just to build into PostGIS core, but not
sure how much effort is involved there.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Olivier is working on much of the 3D
stuff and many of the PostGIS core dev are having a code sprint
in Paris.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">I think there is still space left if you want to chat up
with them and you can make the trip.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"><a href="http://trac.osgeo.org/postgis/wiki/DevWikiEvent" target="_blank">http://trac.osgeo.org/postgis/wiki/DevWikiEvent</a></font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Hope that helps,</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial">Regina</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"><a href="http://www.postgis.us" target="_blank">http://www.postgis.us</a></font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial"></font></span> </div><br>
<blockquote style="BORDER-LEFT:#0000ff 2px solid;PADDING-LEFT:5px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px" dir="ltr">
<div dir="ltr" lang="en-us" align="left">
<hr>
<font face="Tahoma"><b>From:</b>
<a href="mailto:postgis-devel-bounces@postgis.refractions.net" target="_blank">postgis-devel-bounces@postgis.refractions.net</a>
[mailto:<a href="mailto:postgis-devel-bounces@postgis.refractions.net" target="_blank">postgis-devel-bounces@postgis.refractions.net</a>] <b>On Behalf Of </b>Sam
Hariton<br><b>Sent:</b> Tuesday, May 01, 2012 4:06 PM<br><b>To:</b>
<a href="mailto:postgis-devel@postgis.refractions.net" target="_blank">postgis-devel@postgis.refractions.net</a><br><b>Subject:</b> [postgis-devel]
ST_Buffer in 3D supporting Z<br></font><br></div><div><div class="h5">
<div></div>
<div class="gmail_quote">Is anyone looking at adding the ability for st_buffer
to keep Z coordinates as well for 3-dimensional spaces? If so, I'd like
to help.<br><br>The Postgis 2.0 docs state: <span style="BACKGROUND-COLOR:rgb(228,247,221);FONT-FAMILY:'Lucida Grande',Verdana,Geneva,Arial,Helvetica,sans-serif;COLOR:rgb(46,46,46);FONT-SIZE:13px">This
function ignores the third dimension (z) and will always give a 2-d buffer
even when presented with a 3d-geometry.</span><br><br>Right now <br><br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote"><span>
<div>select st_astext(st_buffer(geomfromEWKT('POINT(0 0
0)'),1));</div></span></blockquote><br>Generates a flat Polygon/Circle of
radius 1 (completely dropping the z dimension):<br><br> POLYGON((1
0,0.980785280403231 -0.195090322016128,0.923879532511287
-0.382683432365089,0.831469612302546 -0.555570233019602,0.707106781186548
-0.707106781186547,0.555570233019603 -0.831469612302545,0.382683432365091
-0.923879532511286,0.19509032201613 -0.98078528040323,1.61554255216634e-15
-1,-0.195090322016126 -0.980785280403231,-0.382683432365088
-0.923879532511288,-0.555570233019601 -0.831469612302546,-0.707106781186546
-0.707106781186549,-0.831469612302544 -0.555570233019604,-0.923879532511286
-0.382683432365092,-0.98078528040323 -0.195090322016131,-1
-3.23108510433268e-15,-0.980785280403231
0.195090322016125,-0.923879532511288<br> 0.382683432365086,-0.831469612302547
0.555570233019599,-0.70710678118655 0.707106781186545,-0.555570233019606
0.831469612302543,-0.382683432365094 0.923879532511285,-0.195090322016132
0.98078528040323,-3.73640463187386e-15 1,0.195090322016125
0.980785280403231,0.382683432365087 0.923879532511288,0.5555702330196
0.831469612302547,0.707106781186545 0.70710678118655,0.831469612302544
0.555570233019604,0.923879532511286 0.382683432365092,0.98078528040323
0.19509032201613,1 0))<br><br>Whereas, if it had z support it should actually
generate a Polyhedral Surface/Sphere of radius 1 centered on (0 0 0)<font color="#888888"><br></font></div>
<div class="gmail_quote"><br></div>
<div class="gmail_quote"> - Sam</div>
<div class="gmail_quote"><br></div></div></div></blockquote></div>
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