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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>What is the spatial reference system of your data. If it’s in degrees, your areas are all going to be all < 1. You’d have to go with something like 0.0001 or cast your data to geography when you do the check<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>e.g. assuming your srid is 4326 <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>select ST_Asgeojson( geom ) from table where ST_Intersects(ST_GeomFromGeoJSON('$state'), geom)=TRUE and ST_Area(ST_Intersection(ST_GeomFromGeoJSON('$state')::geography, geom::geography))>1<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hope that helps,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Regina<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><a href="http://www.postgis.us">http://www.postgis.us</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><a href="http://postgis.net">http://postgis.net</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> postgis-users-bounces@lists.osgeo.org [mailto:postgis-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Joseph Spenner<br><b>Sent:</b> Monday, February 02, 2015 1:31 PM<br><b>To:</b> PostGIS Users Discussion<br><b>Subject:</b> Re: [postgis-users] Possible for ST_Intersects to not include the perimeter?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id=yiv4647088579><div id="yui_3_16_0_1_1422892475699_66013"><div id="yui_3_16_0_1_1422892475699_66012"><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>Chris:<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'> I've been trying to get your suggestion to work as well, but appear to be having some problem with the syntax.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>I currently have a situation where I have a polygon completely inside of a state, as well as a couple on the border.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>I have a query, but it returns ZERO:<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66295"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>select ST_Asgeojson( geom ) from table where ST_Intersects(ST_GeomFromGeoJSON('$state'), geom)=TRUE and ST_Area(ST_Intersection(ST_GeomFromGeoJSON('$state'), geom))>1<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66340"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66514"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66341"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>I have been using the following, with pretty good success:<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66342"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66350"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>select ST_Asgeojson( geom ) from table where ST_Intersects(ST_GeomFromGeoJSON('$state'), geom)=TRUE and ST_Touches(ST_GeomFromGeoJSON('$state'), geom)=FALSE<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66352"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66425"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>But sometimes, there seems to be a really tiny square centimeter of area which makes the above succeed, so I would like to have at least some value to describe "how much intersection?" there is. But even using a small value (1), it always makes my select return no rows.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66517"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66518"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>Ideas?<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66519"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><br>Thanks!<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66520"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66584"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>Regardds,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66583"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'>Joseph Spenner<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66582"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id="yiv4647088579yui_3_16_0_1_1422892475699_64496"><p class=MsoNormal style='background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-size:10.5pt;font-family:"Garamond",serif;color:black'><o:p> </o:p></span></p></div><div id=yiv4647088579yqt12816><div id="yiv4647088579yui_3_16_0_1_1422892475699_64527"><div id="yiv4647088579yui_3_16_0_1_1422892475699_64526"><div id="yiv4647088579yui_3_16_0_1_1422892475699_64525"><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='background:white'><b id="yui_3_16_0_1_1422892475699_66294"><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'> Christopher Swingley <<a href="mailto:cswingle@swingleydev.com">cswingle@swingleydev.com</a>><br><b>To:</b> Joseph Spenner <<a href="mailto:joseph85750@yahoo.com">joseph85750@yahoo.com</a>> <br><b>Cc:</b> PostGIS Users Discussion <<a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a>> <br><b id="yui_3_16_0_1_1422892475699_66292">Sent:</b> Wednesday, January 21, 2015 4:58 PM<br><b id="yui_3_16_0_1_1422892475699_66290">Subject:</b> Re: [postgis-users] Possible for ST_Intersects to not include the perimeter?</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1422892475699_66280"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>Joseph,<br><br>On Wed, Jan 21, 2015 at 2:34 PM, Joseph Spenner <<a href="mailto:joseph85750@yahoo.com" target="_blank">joseph85750@yahoo.com</a>> wrote:<o:p></o:p></span></p><div id="yui_3_16_0_1_1422892475699_66281"><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id=yiv4647088579yqtfd57069><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>> I have NWS polygons describing Thunderstorm Warnings, which are made up of<br>> counties within the state. Some of those counties might be on the edge of<br>> the state. I want to query my database to show me all Warnings which are in<br>> a supplied state. However, if I query the adjacent state which borders the<br>> counties from the first state, I get those Warnings because they share the<br>> same parimeter points.<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br><br>What about finding the states that intersect thunderstorm warnings<br>where the intersection area is greater than some small threshold?<br>Something like:<br><br>ST_Intersects(warning_geom, state_geom) AND<br>ST_Area(ST_Intersection(warning_geom, state_geom)) > 1000<br><br>Cheers,<br><br>Chris<br>-- <br>Christopher Swingley<br>Fairbanks, Alaska<br><a href="http://swingleydev.com/" target="_blank">http://swingleydev.com/</a><br><a href="mailto:cswingle@swingleydev.com" target="_blank">cswingle@swingleydev.com</a><o:p></o:p></span></p><div id=yiv4647088579yqtfd70884><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div></div></div></div></div></div></div></div></div></body></html>