So, I just moved some las points by about 15 metres to test something else, but to check it worked correctly, I confirmed with the ruler that it was about the right distance. It struck me how hard it is to actually make accurate readings with the ruler.
If I hadn't of known exactly how far I'd moved the las points, I would have had an error of about +/- 10% in my measurement of a really clearly defined and obvious object.
The ruler could do with a couple of aides, like vertical and horizontal lines crossing the screen at each end of the ruler, and a breakdown of vertical and horizontal components of each measurement. I would also be interested in finding ways to measure or estimate differences between not-so-clearly defined features. Maybe something like drawing two circles to get the maximum, minimum and likely ranges of values that could indicate the distance between two clouds.
So, I just moved some las points by about 15 metres to test something else, but to check it worked correctly, I confirmed with the ruler that it was about the right distance. It struck me how hard it is to actually make accurate readings with the ruler.
If I hadn't of known exactly how far I'd moved the las points, I would have had an error of about +/- 10% in my measurement of a really clearly defined and obvious object.
The ruler could do with a couple of aides, like vertical and horizontal lines crossing the screen at each end of the ruler, and a breakdown of vertical and horizontal components of each measurement. I would also be interested in finding ways to measure or estimate differences between not-so-clearly defined features. Maybe something like drawing two circles to get the maximum, minimum and likely ranges of values that could indicate the distance between two clouds.