Hi

Does any one know the calulation for working out the scale of the map

ie 1:20000

I can find anywhere on the net that tells me the caluation

Thanks

Colin

How do you want the scale expressed?

I think 1:20,000 is equivalent to 1cm = 20,000cm or 200m (0.2km) does that make sense?

You could do the same thing with inches like 1in = 20,000in

20,000in is 1666.7 feet which is

1667 / 5280 feet in a mile = 0.316 miles

Is my logic correct? Perhaps someone else who was a Geography major but has more brain cells left can pipe in

Eric

Hi Eric,

Your brain is correct. When I ping my brain cells they reply with the same result in their ICMP packet

Hi Colin,

Is what you wants to do calculate the scale of the current displayed map ?

Yes i want to calucate to to the OS maps scales

IE you can buy a map in 1:20000 scale

I need to display this in the tool bar at the bottom of my app

Colin

Hi

I have finally got back to this now the problem i have is what is the altitude property messured in ie Feet, Meters

I need to know this so i can work out the calulation for the Scale

Colin

Hi,

Altitude is in miles or in kilometers, depending on the value of the property 'Units' (geoKm or geoMiles).