Hi Brent, Thanks for the response. I don't think your original response made it into my inbox via the list, but now I see it on the website thread. That seems like it might be a viable alternative, I just worry about those vessel tracks that would be clearly outside of a particular grid cell, but whose buffer would bleed over. How did you handle this type of situation?
Jeff On Mon, Dec 24, 2012 at 7:22 PM, <[email protected]> wrote: > Jeff, > > Did you see my reply using vessel tracklines as vectors & a grid in > Postgis to do exactly what you describe? > > Given we were looking at benthic impact, we buffered the tracklines to > create polygons representing the swept area of the deployed fishing gear. > These were clipped by the cells, & we could generate statistics suca as the > cumulative swept area of all tracks with each cell, number of times each > cell was crossed, & given the tracklines have a timestamp associated with > them, we could also look at the temporal pattern of tracks crossing cells, > for things like seasonal impacts & variation between seasons. > > Cheers, > > Brent Wood >
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