[OSM-talk] ferry route speed

[David Groom]

----- Original Message ----- 
From: "Andy Robinson (blackadder-lists)" <ajrlists at googlemail.com>
To: "'David Groom'" <reviews at pacific-rim.net>; <talk at openstreetmap.org>
Sent: Tuesday, September 02, 2008 12:10 AM
Subject: RE: [OSM-talk] ferry route speed


> David Groom wrote:
>>Sent: 01 September 2008 11:59 PM
>>To: talk at openstreetmap.org
>>Subject: Re: [OSM-talk] ferry route speed
>>
>>
>>----- Original Message -----
>>From: "Gervase Markham" <gerv-gmane at gerv.net>
>>To: <talk at openstreetmap.org>
>>Sent: Monday, September 01, 2008 9:34 PM
>>Subject: Re: [OSM-talk] ferry route speed
>>
>>
>>>
>>> David Groom wrote:
>>>> When tagging ferry routes is anyone tagging ferry speed, and  if so do
>>>> you
>>>> simply add maxspeed = ??  to thr route?
>>>
>>> maxspeed is for speed limits. Unless the coastguard has imposed one,
>>> please don't use that tag :-) If it's a particular single route, why not
>>> "time" or "duration"?
>>
>>I have no particular views either way, just that as maxspeed was already 
>>in
>>use I thought that routing applications would understand it, whereas
>>another
>>tag such as "time" or duration" would mean routing applications having to
>>adapt to this.
>>
>>Having said that its much easier to know the time a ferry crossing takes
>>rather than work out the speed of the crossing
>
> Yes, best not to try to be too smart. If the ferry has a scheduled 
> departure
> and arrival time the crossing_duration= should be good enough. The speed 
> can
> be worked out by computation in the routing app.
>

Ok .
I've added a comment to 
http://wiki.openstreetmap.org/index.php/Talk:Tag:route%3Dferry  if anyone 
cares to comment more on this.

David


> Cheers
>
> Andy
>