Useful Notes
For Internal areas with light coloured walls - fix target paper to larger coloured sheet.
For box rooms, stand in doorway, avoiding Wall to Wall. Capture complete opposing wall and measure rooms width/depth in one shot.
Works on all iPhones - with first or second generation cameras - see accuracy/distance figures below:
Accuracy 3m +/- 2.5cm 10m +/- 7.5cm 30m +/- 15cm
Distance from iPhone to target
A3/Ledger 2G/3G -15m 3GS - 30m
A4/Letter 2G/3G -10m 3GS -15m
Site Survey needs a "known size" target of standard white paper - A4, A3, Letter or Ledger mounted flat and unwrinkled in landscape mode.
Once loaded the app will sense orientation, you need hold the iPhone level capture image with the camera button then tap to identify the target - tap the screen directly on the target.
This can take more than one attempt use “Back” to start again. An accurate measure results is a square surrounding the target tight on all edges.- you are now fixed for distance. Measurements can then be made by adjusting sights freely.
In WTW "Wall to Wall" mode you can accurately measure internal rooms and areas - once set use camera button as normal - a short timer starts to allowing time to hold against the opposing wall, keep level and out of shot.
With the forward button each screen with, displayed measurements, can be saved to photo library or emailed on. A complete Site Survey recorded on your iPhone.
Site Survey - Example Video and instructions
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