Spatial relationship between the movement of one feature relative to another

CaiLadd — Tue, 27 Jan 2015 18:54:00 GMT

Dear all,

I'm hoping you can advise on what may be a very simple problem. Here's the scenario:

I have several maps of an estuary, each separated by ten years from the last. On each map are two variables: position of salt marsh edge and position of the main water channel along the estuary (currently, the water channel is a polyline, and the marsh is actually in the form of a polygon, mapping its entire area, not just the edge).

I want to know if there's a relationship between change in channel position and change of the marsh edge over time. My H1 is that "the marsh edge moves away from the tidal channel at a given threshold proximity" (because the closer a water channel is to the marsh edge, the more erosion there is, although the channel has to be close enough to start the erosion process, hence the threshold proximity).

This simple model is analogous to that of a magnet - two magnets with opposite poles facing each other, lie on a table. As you start to move magnet A closer to magnet B, Magnet B does not start moving until Magnet A is close enough to overcome the friction between magnet B and the table. Magnet A is the water channel and magnet B is the salt marsh.

So, my problem. How would I demonstrate a statistical relationship between channel position and marsh edge erosion? Demonstrating it graphically is also a challenge I have!

Thank you in advance for any advice you can offer.

All the best,

Cai

Re: Spatial relationship between the movement of one feature relative to another

DanPatterson_Retired — Tue, 27 Jan 2015 21:47:11 GMT

I will initially suggest that you visit Cross Validated a site dealing with statistical/data analysis specifically, limiting your keywords to spatial or spatio-temporal may assist in locating appropriate statistical tests if none that are within the Spatial Statistics toolbox are useful

Re: Spatial relationship between the movement of one feature relative to another

CaiLadd — Tue, 27 Jan 2015 22:10:35 GMT

Hi Dan,

Ok, thank you for the advice. I’ll go to Cross Validate.

topic Re: Spatial relationship between the movement of one feature relative to another in Spatial Statistics Questions

Spatial relationship between the movement of one feature relative to another

Re: Spatial relationship between the movement of one feature relative to another

Re: Spatial relationship between the movement of one feature relative to another