[Talk-GB] Is this a footbridge? - iD measurements

[Martin Wynne]

Many thanks Nick and Michael. I obviously need to do more RTFM. :)

I did some digging in the Help panel and found that there are several 
out-of-date lists of iD shortcuts.

To get the Measurements panel to appear I have to press CTRL+I, not M, 
at least in the Opera browser.

The scalebar is useful, but not very convenient to use as it stands. I 
found that clicking on it toggles metres or feet units.

To make much use of it needs a pixel ruler. There is a free one at:

  http://www.spadixbd.com/freetools/

which can be used horizontally or vertically (but not at an angle 
unfortunately).

Using the scalebar and the pixel ruler you can calculate the essential 
metric, which is metres-per-pixel at the current zoom. Which can then be 
used to measure any element on the screen using the ruler.

cheers,

Martin.