Altitude - definition?

Mappoint has the zoom factor expressed as altitude.  Why is this?  Why not 
just a scale factor?

I suspect that a screen showing a map at altitude 3 miles looks the same 
scale as what I would see by eye from an aeroplane flying at 3 miles.  But 
how far am I supposed to be sitting from the screen?  Is there an exact 
definition of what altitude means in terms of map scale?

Thanks for any guidance on this.

James

         _____________________________________________________

         James Towell    e-mail: james@...
         Reading         web: http://www.cavershamdp.co.uk
         Berks, UK               office: 0118 966 0919 / +44 118 966 0919 / 
Skype

         This month's link: http://www.citycarclub.co.uk/
         _____________________________________________________

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Re: Altitude - definition?

Sorry, Eric,

I thought the email was the public forum, I know better now.  I've just 
found the web based one and have posted another question to it, rather more 
urgent this time!

(I see now that the email list is in fact a news list!)

Cheers

James

At 08:25 10/03/2006 -0500, you wrote:
>I found it! Please post in the public web forum, it is more fun.
>
>Eric
>
>Quoting James Towell <james@...>:
>
> >
> > Mappoint has the zoom factor expressed as altitude.  Why is this?  Why not
> > just a scale factor?
> >
> > I suspect that a screen showing a map at altitude 3 miles looks the same
> > scale as what I would see by eye from an aeroplane flying at 3 miles.  But
> > how far am I supposed to be sitting from the screen?  Is there an exact
> > definition of what altitude means in terms of map scale?
> >
> > Thanks for any guidance on this.
> >

Altitude - definition?

Mappoint has the zoom factor expressed as altitude.  Why is this?  Why not 
just a scale factor?

I suspect that a screen showing a map at altitude 3 miles looks the same 
scale as what I would see by eye from an aeroplane flying at 3 miles.  But 
how far am I supposed to be sitting from the screen?  Is there an exact 
definition of what altitude means in terms of map scale?

Thanks for any guidance on this.

James

         _____________________________________________________

         James Towell    e-mail: james@...
         Reading         web: http://www.cavershamdp.co.uk
         Berks, UK               office: 0118 966 0919 / +44 118 966 0919 / 
Skype

         This month's link: http://www.citycarclub.co.uk/
         _____________________________________________________

__
To unsubscribe from this list, send a message to list-bot@...
containing "UNSUBSCRIBE" in subject.

Re: Altitude - definition?

Sorry, Eric,

I thought the email was the public forum, I know better now.  I've just 
found the web based one and have posted another question to it, rather more 
urgent this time!

(I see now that the email list is in fact a news list!)

Cheers

James

At 08:25 10/03/2006 -0500, you wrote:
>I found it! Please post in the public web forum, it is more fun.
>
>Eric
>
>Quoting James Towell <james@...>:
>
> >
> > Mappoint has the zoom factor expressed as altitude.  Why is this?  Why not
> > just a scale factor?
> >
> > I suspect that a screen showing a map at altitude 3 miles looks the same
> > scale as what I would see by eye from an aeroplane flying at 3 miles.  But
> > how far am I supposed to be sitting from the screen?  Is there an exact
> > definition of what altitude means in terms of map scale?
> >
> > Thanks for any guidance on this.
> >

comparing A9.com's Blockview and the Street-side images

comparing A9.com's Blockview and the Street-side images

comparing A9.com's Blockview and the Street-side images