<span class="gmail_quote"></span>Hello <br>This is my first email (From NZ) to this lovely community. <br>My question:<br>Is there a function provided by PostGIS can check <br>a point location against a line?<br><br>E.g.<br>
################################################<br><br>                                          P(x0,y0)  Above the line
<br>               <br>This is line -------------------------------o------------------------------------- <br>                                P(x1,y1) On the line<br><br>                                       P(x2,y2) Below the line
<br>################################################<br><br clear="all"><br>Thanks in advance,<br><span class="sg"><br>G. Lu</span><br>