Hi,<br><br>Whilst I am waiting for the book to arrive I have started playing a bit with the sample dataset of North Carolina. I am interested in the streets layer (dataset) since basiclaly I am about to do some routing work.
<br><br>Can someone please be kind enough to explain to me what do these columns represent?<br><br> frleft bigint,<br> toleft bigint,<br> frright bigint,<br> toright bigint,<br> frleft_a bigint,<br> toleft_a bigint,
<br> frright_a bigint,<br> toright_a bigint,<br> one_way character varying(80),<br> ft_cost numeric,<br> tf_cost numeric,<br>shape_len numeric,<br> length double precision,<br><br>Also what is the difference between shape_len and length please?
<br><br>My main concern are the one_ways and how I should treat them please.<br><br>Any help will be extremely appreciated!<br><br>Regards<br><br>Matthew<br clear="all"><br>-- <br>Matthew Pulis<br>URL : <a href="http://www.solutions-lab.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
http://www.solutions-lab.net</a><br>MSN : pulis_matthew[@]hotmail.com<br>ICQ : 145951110<br>Skype : <a href="http://solutions-lab.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> solutions-lab.net
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