Spatially analyzing tree sway patterns

JennaKlinck — Thu, 10 Apr 2014 17:11:44 GMT

Hello,

I am a master's student working on tree sway analysis. I use ArcGIS to create point density contours of each tree's movement over time. I have points of a tree's location as it moves in the wind every 1/10th of a second for an hour, which I import as X and Y spatial data. I then use Spatial Analyst to create a point density contour of the tree's location. I have attached an image of an example of tree sway. I would like to be able to quantify the spatial distribution/pattern of the contours, but am unsure how. I can turn the outline of the outer contour into a polygon - however I am unsure how to get spatial information about the shape of sway. I would love to figure out a way to look at the symmetry of the shape, or perhaps the longest axis of symmetry (what direction the tree is swaying in) (perhaps by quadrant so I can quantify trees that sway in more than one primary direction). I also have the point data I used to create this contour which I could analyze for spatial patterns, etc.

Any idea or suggestions is greatly appreciated! Thank you!

Jenna

Re: Spatially analyzing tree sway patterns

HagenSchwaß — Thu, 19 Jun 2025 10:20:11 GMT

I have symmetry detectors for polygons, an Add-In for ArcGIS which is in the application process for the marketplace portal now. Actually it doesn't print the symmetry line because I didn't know that this was requested. In the CAD version it prints the symmetry line.

topic Re: Spatially analyzing tree sway patterns in Spatial Statistics Questions

Spatially analyzing tree sway patterns

Re: Spatially analyzing tree sway patterns