3 ms·
Seems to be for rendering? I’m talking about getting my boots on the ground and measuring where things actually are!
by gorgoiler 5y ago
Seems to be for rendering? I’m talking about getting my boots on the ground and measuring where things actually are!
- slater 5y agoD’oh! My bad!
- bigiain 5y agoHow big is the park? And what sort of accuracy are you after? What equipment do you have available and/or what sort ofd budget are you hoping to keep within? For an "on the cheap, lots of DIY" approach - I've got an inexpensive (~$40 from memory) laser rangefinder with sub cm accuracy and a range of a bit over 100m (it'll get ~120m for things with "good" reflective properties, sometimes only 50m or so for "bad" surfaces). If the park is a suitable size, you could probably start with a Google Satellite view, and measure enough distances to triangulate everything to calibrate the satellite imagery. I've considered (but never gotten around to) attaching a 3 axis digital compass module so I can record angles and elevations for each distance measurement. That'd help a lot of there are lots of objects you want to plot positions for - you wouldn't need 2-3 measurements from different known locations for each object that way. See also my other comment about using a drone and photogrammetry.
- gorgoiler 5y agoGreat questions, thank you for you responding. It is a small park, 600ft square, but conservation means we would like to map tree locations precisely. Half a trunk diameter would do: around about 6”. In metric that’s around 200m with accuracy of 200mm. Budget is up to $500. We have time and tech ability on our side, so don’t need a Total Station (something I’ve learned about recently) that can do everything, but it would be nice.