<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div class="" id="yui_3_16_0_1_1453317848907_10974">Felix,</div><div class="" id="yui_3_16_0_1_1453317848907_9856">Thanks for the tip
and I am kind of doing the same way. An intersect or union would help
me test and compare my result with other GIS software. Also, thanks for
the mapbutcher link on union. I will look into it.<br></div><div class="" id="yui_3_16_0_1_1453317848907_10164"><br class="" id="yui_3_16_0_1_1453317848907_10978"></div><div class="" id="yui_3_16_0_1_1453317848907_10043">Steve, <br class="" id="yui_3_16_0_1_1453317848907_10981"></div><div id="yui_3_16_0_1_1453317848907_10982" dir="ltr">Thanks for the tiles approach, I am going to to give it a try. <br></div><div id="yui_3_16_0_1_1453317848907_11185" dir="ltr"><br></div><div id="yui_3_16_0_1_1453317848907_10983" dir="ltr">Pierre,</div><div id="yui_3_16_0_1_1453317848907_10984" dir="ltr">Thanks for the postgis addon link. I will look into it.</div><div id="yui_3_16_0_1_1453317848907_11213" dir="ltr"><br></div><div id="yui_3_16_0_1_1453317848907_11214" dir="ltr">-Ravi.<br></div><div id="yui_3_16_0_1_1453317848907_10941"><span></span></div> <div class="qtdSeparateBR"><br><br></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Tuesday, January 19, 2016 10:30 AM, Pierre Racine <Pierre.Racine@sbf.ulaval.ca> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div class="yqt6153224667" id="yqtfd93008">> @Vincent : For ArcGIS Union, please see here.<br clear="none">> <a shape="rect" href="http://resources.esri.com/help/9.3/arcgisengine/java/gp_toolref/analysis_" target="_blank">http://resources.esri.com/help/9.3/arcgisengine/java/gp_toolref/analysis_</a><br clear="none">> tools/union_analysis_.htm</div><br clear="none"><br clear="none">ArcGIS Union resume to removing overlaps from the union of two tables. Look at the ST_DifferenceAgg() example in the PostGIS Addons:<br clear="none"><br clear="none"><a shape="rect" href="https://github.com/pedrogit/postgisaddons/blob/master/postgis_addons.sql" target="_blank">https://github.com/pedrogit/postgisaddons/blob/master/postgis_addons.sql</a><br clear="none"><br clear="none">This produce a clean table (layer) without overlaps from the union of two (polygon) tables (layers).<br clear="none"><br clear="none">Pierre<div class="yqt6153224667" id="yqtfd68996"><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>