[prev in list] [next in list] [prev in thread] [next in thread]
List: postgis-users
Subject: [postgis-users] Finding nearest node
From: <andy () centremaps ! com>
Date: 2010-01-28 17:24:55
Message-ID: 00dd01caa03e$d1f9b560$75ed2020$ () com
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
Hi,
I'm guess this is not a new subject but wondered if anyone had done testing
on the following scenarios.
We're looking at how we can manage "snap to node" options for some drawing
tools on a web mapping interface. There seem to be 2 options:
1) Query the database to find the nearest node from a point, line and
polygon dataset
2) Query the database for all nodes within a bounding box and then find
the nearest point locally
I wondered if there is any code for such calls?
Kind Regards
Andy
[Attachment #5 (text/html)]
<html xmlns:v="urn:schemas-microsoft-com:vml" \
xmlns:o="urn:schemas-microsoft-com:office:office" \
xmlns:w="urn:schemas-microsoft-com:office:word" \
xmlns:x="urn:schemas-microsoft-com:office:excel" \
xmlns:p="urn:schemas-microsoft-com:office:powerpoint" \
xmlns:a="urn:schemas-microsoft-com:office:access" \
xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" \
xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" \
xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" \
xmlns:b="urn:schemas-microsoft-com:office:publisher" \
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" \
xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" \
xmlns:odc="urn:schemas-microsoft-com:office:odc" \
xmlns:oa="urn:schemas-microsoft-com:office:activation" \
xmlns:html="http://www.w3.org/TR/REC-html40" \
xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" \
xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" \
xmlns:Repl="http://schemas.microsoft.com/repl/" \
xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" \
xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" \
xmlns:ppda="http://www.passport.com/NameSpace.xsd" \
xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" \
xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" \
xmlns:ds="http://www.w3.org/2000/09/xmldsig#" \
xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" \
xmlns:udc="http://schemas.microsoft.com/data/udc" \
xmlns:xsd="http://www.w3.org/2001/XMLSchema" \
xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" \
xmlns:ec="http://www.w3.org/2001/04/xmlenc#" \
xmlns:sp="http://schemas.microsoft.com/sharepoint/" \
xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" \
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" \
xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" \
xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" \
xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" \
xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" \
xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" \
xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" \
xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" \
xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" \
xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" \
xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" \
xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" \
xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" \
xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" \
xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" \
xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" \
xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" \
xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:205141184;
mso-list-type:hybrid;
mso-list-template-ids:-314004302 134807569 134807577 134807579 134807567 134807577 \
134807579 134807567 134807577 134807579;} @list l0:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-GB link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m guess this is not a new subject but wondered if
anyone had done testing on the following scenarios.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We’re looking at how we can manage “snap to \
node” options for some drawing tools on a web mapping interface. There seem to \
be 2 options:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if \
!supportLists]><span style='mso-list:Ignore'>1)<span style='font:7.0pt "Times New \
Roman"'> </span></span><![endif]>Query the database to \
find the nearest node from a point, line and polygon dataset<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if \
!supportLists]><span style='mso-list:Ignore'>2)<span style='font:7.0pt "Times New \
Roman"'> </span></span><![endif]>Query the database for \
all nodes within a bounding box and then find the nearest point \
locally<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I wondered if there is any code for such calls?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Kind Regards<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Andy<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</body>
</html>
_______________________________________________
postgis-users mailing list
postgis-users@postgis.refractions.net
http://postgis.refractions.net/mailman/listinfo/postgis-users
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic