setting up measurement/scale units in autocad

[Gary Prentice]

Trying to set up a site plan, I've downloaded a map in a DWG file.

 

First problem: It's in Layout only and the tree part of the software only works in Model! Exporting to Model Space sorted that - so far so good.

 

The problem is the map measurements. Measuring the scale bar on the plan, 10m on the scale bar measures ( using the measure function) reads as 0.4276:confused1:

 

Using topographical supplied plans, I normally measure a road (8-10m wide) and then depending on the position of the decimal point, I know whether to enter the drawing units as mm,cm or m in the drawing set-up tab.

 

I'm guessing OS originally drew this non-metric, so I'm struggling now to input metric scaled tree locations/canopy spreads.

 

I'm guessing this is a common issue and not too difficult to sort out, but my head hurts today Help, anyone?

[Paul Barton]

Hi Gary. So frustrating, I have been there often! As far as I can work out, you need to re-scale the whole drawing. You can do that by using the scale command and using two points on the 10 metre scale bar as references. I always forget the order you do it in so end up googling it!

 

 

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[Paul Barton]

 

 

Sent from my iPhone using Arbtalk

[Gary Prentice]

Thanks Paul, I couldn't even begin to think of the terminology to use to search myself.

 

I can vaguely remember one of the speakers at your seminar talking about this and how to set things up, but there was just too much to take in/follow and make notes on.

 

I seem to have got this scaled right now, or at least if I measure a metre on the scale bar it corresponds.

[MATTMOSS]

I know people who have worked on cad all their lives and still cant use it to half its potential.

[Gary Prentice]

Potential!

 

All I need to do is draw some circles.