[postgis-users] polygon minimum width

[Surya Tarigan]

Hallo Nicklas

fortunately I have linestring version of the polygon, but it seems that the linestirings are not continuous. Does st_distance still apply? Or are there any postgis function to make the polyline continuous?

kind regards,





________________________________
From: "nicklas.aven at jordogskog.no" <nicklas.aven at jordogskog.no>
To: PostGIS Users Discussion <postgis-users at postgis.refractions.net>
Sent: Thursday, October 1, 2009 3:50:37 PM
Subject: Re: [postgis-users] polygon minimum width


Hallo

I think the easiest way is to make a linestring of the polygon.boundary and then cut the line in the start and end so you get two more or less paralell lines. Then you can use st_distance to find the shortest distance between them.

Hope that helps
Nicklas

2009-10-01 Surya Tarigan wrote:

>
>
Dear list, 
>

>
I  have a river polygon with polygon length about 20 km.  How can I query the minimum width of  the river polygon. I tried to search previous threads, but I could not find any clue.
>

>
kind regards,
>

>
surya
> 


      
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