Hello everybody<br><br>For another time, i ask your help and your experience!!<br>Specifically, i want to create voronoi diagrams with postgis, and i found the following intersting link<br><a href="http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgresql_plr_tut02">http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgresql_plr_tut02</a><br>
So, i have installed the pl/r language and i have run the voronoi function.<br>But, i don't understand what kind of my data i have to place, at the below line code<br><span id="ctl00_cphMain_BodyContent">WHERE town = ''BOSTON'' AND grades LIKE ''%3%'' AND type = ''PUB''</span><br>
why the writer use a WHERE statement ?? <br>what does mean the variable "%3%" ??<br><br>Thankss<br>