[GRASS-user] 3rd Grass Book Data Set

[Markus Neteler]

Matthew,

you can find the legend here:
http://www.grassbook.org/data_menu3rd.php
-> ncexternal/: NC original data set sources, metadata and copies of some
original data
     -> take metadata link
              -> Streets.shp ...  streets_wake_legend.csv

Most columns are explained there (as I could reconstruct them from the
original metadata
which you also find linked there (see "Data URL")).

Hope this helps,
Markus


Yancho wrote:
> 
> Hi,
> 
> 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.
> 
> Can someone please be kind enough to explain to me what do these columns
> represent?
> 
> frleft bigint,
> toleft bigint,
> frright bigint,
> toright bigint,
> frleft_a bigint,
> toleft_a bigint,
> frright_a bigint,
> toright_a bigint,
> one_way character varying(80),
> ft_cost numeric,
> tf_cost numeric,
> shape_len numeric,
> length double precision,
> 
> Also what is the difference between shape_len and length please?
> 
> My main concern are the one_ways and how I should treat them please.
> 
> Any help will be extremely appreciated!
> 
> Regards
> 
> Matthew
> 
> -- 
> Matthew Pulis
> URL : http://www.solutions-lab.net
> MSN : pulis_matthew[@]hotmail.com
> ICQ : 145951110
> Skype : solutions-lab.net
> 

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