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leaflet.js? https://leafletjs.com/ https://leafletjs.com/

• 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 ago
    D’oh! My bad!
  • bigiain 5y ago
    How 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 ago
      Great 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.