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Subject: Re: [postgis-users] Request to develop st_pointonsurface variant to output a random point (not an ar
From: "Stephen V. Mather" <svm () clevelandmetroparks ! com>
Date: 2013-01-29 19:17:17
Message-ID: C340540F516C5B488D36C1359E1A272C075EA90D () SN2PRD0510MB382 ! namprd05 ! prod ! outlook ! com
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No problem. And as it is written as a function, it becomes a permanent fea=
ture in your database.
Best,
Steve
[http://sig.cmparks.net/cmp-ms-90x122.png] Stephen V. Mather
GIS Manager
(216) 635-3243 (Work)
clevelandmetroparks.com<http://www.clemetparks.com>
________________________________
From: postgis-users-bounces@lists.osgeo.org [postgis-users-bounces@lists.os=
geo.org] on behalf of Luis Carrasco [leca00@gmail.com]
Sent: Tuesday, January 29, 2013 2:16 PM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] Request to develop st_pointonsurface variant t=
o output a random point (not an arbitrary one)
Thanks Steven!
I think that puts me in the right direction.
Best regards,
Luis
On Tue, Jan 29, 2013 at 2:01 PM, Stephen V. Mather <svm@clevelandmetroparks=
.com<mailto:svm@clevelandmetroparks.com>> wrote:
You might look to this post:
http://sorokine.blogspot.com/2011/05/postgis-function-for-random-point.html
Best,
Steve
Stephen V. Mather
GIS Manager
(216) 635-3243<tel:%28216%29%20635-3243> (Work)
clevelandmetroparks.com<http://www.clemetparks.com>
________________________________
From: postgis-users-bounces@lists.osgeo.org<mailto:postgis-users-bounces@li=
sts.osgeo.org> [postgis-users-bounces@lists.osgeo.org<mailto:postgis-users-=
bounces@lists.osgeo.org>] on behalf of Luis Carrasco [leca00@gmail.com<mail=
to:leca00@gmail.com>]
Sent: Tuesday, January 29, 2013 1:53 PM
To: postgis-users@lists.osgeo.org<mailto:postgis-users@lists.osgeo.org>
Subject: [postgis-users] Request to develop st_pointonsurface variant to ou=
tput a random point (not an arbitrary one)
Hello,
This is more of a wishlist item. I've tried using st_pointonsurface as part=
of a point geomasking routine but all the points I get follow the same pat=
tern of angle and direction. Could a new function be integrated into postgi=
s where the output point has a random location within a surface? I'm solvin=
g my problem by using a different approach for my purposes which ends being=
a little more complicated (therefore, this request), but I think returning=
a true random point could help other colleagues as well when working with =
a large dataset.
Thanks,
Luis
--
Luis Eduardo Carrasco, Ph.D.
Spatial Analyst
Health & Spatial Analysis Unit
State Center for Health Statistics &
UNC Lineberger Comprehensive Cancer Center
Department of Health and Human Services
_______________________________________________
postgis-users mailing list
postgis-users@lists.osgeo.org<mailto:postgis-users@lists.osgeo.org>
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--
Luis Eduardo Carrasco, Ph.D.
919.757.5574
skype: luis_e_carrasco
leca00@gmail.com<mailto:leca00@gmail.com>
http://www.unc.edu/~lecarras/<http://www.unc.edu/%7Elecarras/>
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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">No \
problem. And as it is written as a function, it becomes a permanent feature in \
your database. <div><br>
</div>
<div>Best,<br>
Steve<br>
<div><br>
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">
<div class="WordSection1">
<p class="MsoNormal"><img src="http://sig.cmparks.net/cmp-ms-90x122.png" \
alt="http://sig.cmparks.net/cmp-ms-90x122.png" align="left" height="122" hspace="12" \
width="90"> <span style="font-size:14.0pt; \
font-family:"Arial","sans-serif"; color:#006C56">Stephen V. \
Mather<br> </span><span style="font-size:11.0pt; \
font-family:"Arial","sans-serif"; color:#006C56">GIS Manager<br> \
</span><span style="font-size:9.0pt; \
font-family:"Arial","sans-serif"; color:#006C56">(216) 635-3243 \
(Work) </span><span style="font-size:11.0pt; \
font-family:"Calibri","sans-serif"; color:#1F497D"><a \
href="http://www.clemetparks.com" target="_blank"><span style=""><br> \
clevelandmetroparks.com</span></a></span></p> <p class="MsoNormal"></p>
<br>
</div>
</div>
<div></div>
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</div>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div id="divRpF802303" style="direction: ltr;"><font face="Tahoma" size="2" \
color="#000000"><b>From:</b> postgis-users-bounces@lists.osgeo.org \
[postgis-users-bounces@lists.osgeo.org] on behalf of Luis Carrasco \
[leca00@gmail.com]<br> <b>Sent:</b> Tuesday, January 29, 2013 2:16 PM<br>
<b>To:</b> PostGIS Users Discussion<br>
<b>Subject:</b> Re: [postgis-users] Request to develop st_pointonsurface variant to \
output a random point (not an arbitrary one)<br> </font><br>
</div>
<div></div>
<div>Thanks Steven!<br>
<br>
I think that puts me in the right direction.<br>
<br>
Best regards,<br>
<br>
Luis<br>
<div class="gmail_quote"><br>
On Tue, Jan 29, 2013 at 2:01 PM, Stephen V. Mather <span dir="ltr"><<a \
href="mailto:svm@clevelandmetroparks.com" \
target="_blank">svm@clevelandmetroparks.com</a>></span> wrote:<br> <blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; \
padding-left:1ex"> <div>
<div style="direction:ltr; font-size:10pt; font-family:Tahoma">You might look to this \
post: <div><br>
</div>
<div><a href="http://sorokine.blogspot.com/2011/05/postgis-function-for-random-point.html" \
target="_blank">http://sorokine.blogspot.com/2011/05/postgis-function-for-random-point.html</a></div>
<div><br>
</div>
<div>Best,<br>
Steve<br>
<div><br>
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">
<div>
<p class="MsoNormal"><span style="font-size:14.0pt; \
font-family:"Arial","sans-serif"; color:#006c56">Stephen V. \
Mather<br> </span><span style="font-size:11.0pt; \
font-family:"Arial","sans-serif"; color:#006c56">GIS Manager<br> \
</span><span style="font-size:9.0pt; \
font-family:"Arial","sans-serif"; color:#006c56"><a \
href="tel:%28216%29%20635-3243" value="+12166353243" target="_blank">(216) \
635-3243</a> (Work) </span><span style="font-size:11.0pt; \
font-family:"Calibri","sans-serif"; color:#1f497d"><a \
href="http://www.clemetparks.com" target="_blank"><span><br> \
clevelandmetroparks.com</span></a></span></p> <p class="MsoNormal"></p>
<br>
</div>
</div>
<div></div>
</div>
</div>
<div style="font-size:16px; font-family:Times New Roman">
<hr>
<div style="direction:ltr"><font color="#000000" face="Tahoma"><b>From:</b> <a \
href="mailto:postgis-users-bounces@lists.osgeo.org" target="_blank"> \
postgis-users-bounces@lists.osgeo.org</a> [<a \
href="mailto:postgis-users-bounces@lists.osgeo.org" \
target="_blank">postgis-users-bounces@lists.osgeo.org</a>] on behalf of Luis Carrasco \
[<a href="mailto:leca00@gmail.com" target="_blank">leca00@gmail.com</a>]<br> \
<b>Sent:</b> Tuesday, January 29, 2013 1:53 PM<br> <b>To:</b> <a \
href="mailto:postgis-users@lists.osgeo.org" \
target="_blank">postgis-users@lists.osgeo.org</a><br> <b>Subject:</b> [postgis-users] \
Request to develop st_pointonsurface variant to output a random point (not an \
arbitrary one)<br> </font><br>
</div>
<div>
<div class="h5">
<div></div>
<div>Hello,<br>
<br>
This is more of a wishlist item. I've tried using st_pointonsurface as part of a \
point geomasking routine but all the points I get follow the same pattern of angle \
and direction. Could a new function be integrated into postgis where the output point \
has a random location within a surface? I'm solving my problem by using a different \
approach for my purposes which ends being a little more complicated (therefore, this \
request), but I think returning a true random point could help other colleagues as \
well when working with a large dataset.<br>
<br>
Thanks,<br>
<br>
Luis<br clear="all">
<br>
-- <br>
<span lang="en-US"><font color="black" face="Tahoma"><span dir="ltr" \
style="font-size:10pt"> <div><br>
<div><font size="1"><span style="font-size:13px">
<div>
<div>
<div>
<div>
<div style="margin-top:0; margin-bottom:0"><font face="Arial"><span \
style="font-size:10pt">Luis Eduardo Carrasco, Ph.D.</span></font> <br>
<font face="Arial"><span style="font-size:10pt">Spatial Analyst</span></font> <br>
<font face="Arial"><span style="font-size:10pt">Health & Spatial Analysis \
Unit</span></font><font face="Times New Roman" size="3"><span style="font-size:12pt"> \
</span></font><font face="Times New Roman" size="3"><span style="font-size:12pt"><br> \
</span></font><font face="Arial"><span style="font-size:10pt">State Center for Health \
Statistics &</span></font> <br>
<font face="Arial"><span style="font-size:10pt">UNC</span></font> <font face="Arial">
<span style="font-size:10pt">Lineberger Comprehensive Cancer Center</span></font>
<br>
<font face="Arial"><span style="font-size:10pt">Department of Health and Human \
Services</span></font> </div>
</div>
</div>
</div>
</div>
</span></font></div>
</div>
</span></font></span><br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
_______________________________________________<br>
postgis-users mailing list<br>
<a href="mailto:postgis-users@lists.osgeo.org" \
target="_blank">postgis-users@lists.osgeo.org</a><br> <a \
href="http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users" \
target="_blank">http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users</a><br> \
<br> </blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Luis Eduardo Carrasco, Ph.D.<br>
919.757.5574<br>
skype: luis_e_carrasco<br>
<a href="mailto:leca00@gmail.com" target="_blank">leca00@gmail.com</a><br>
<a href="http://www.unc.edu/%7Elecarras/" \
target="_blank">http://www.unc.edu/~lecarras/</a><br> </div>
</div>
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