I will reply to myself on this one.  Lucky I figured it out before 500
people write back saying it is correct, my calculations are wrong.

If I have 1km on the ground, and my scale is 1:3000, then I divide 1 by
0.03 to get the value on the layout, low and behold it is 33.333cm,
which is the measurement I have been getting.

Good on me.

James Kelly

 
Spatial Information Officer
Midway Pty Ltd
150 Corio Quay Road
North Shore Victoria 3215
Tel. +61 3 5277 9255
Fax +61 3 5277 0667
Mob +61 4 3834 5760 (0438 345 760)

-----Original Message-----
From: James M. Kelly [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, 6 September 2005 12:06 PM
To: [email protected]
Subject: MI-L Print scale anomalies

Hi all

 

I have been producing quite a lot of layouts lately and they appeared to
be correct.  Upon checking the scale with a grid that I had produced
previously, I got some unusual results which I can't explain.

 

The grid is 1km x 1km in the map window, and the map window is projected
into MGA94 zone 54.  I have measured the grid in the map window using
the distance tool, and it corresponds to 1km by 1km.  I then put this
into an A1 layout (with the printer as Adobe Acrobat).  I scale the
layout to 1:3000 (1 cm = 0.03 km).  Now one would think that if you
scale the map to 1:3000 and the grid is 1km x 1km on the ground, then
the grid would appear as 30cm x 30cm on the layout.  Again using the
measurement tool, I checked this, and I got a value of around 35 cm.
Now why, when I specifically say to scale it to 1:3000, is it not?

 

Have I missed something here?  If I haven't, then is there a workaround,
apart from trial and error?

 

Any help would be most appreciated.

 

Cheers

 

James Kelly

 

Spatial Information Officer

Midway Pty Ltd

150 Corio Quay Road

North Shore Victoria 3215

Tel. +61 3 5277 9255

Fax +61 3 5277 0667

Mob +61 4 3834 5760 (0438 345 760)

 

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