Patrick

855 reputation

210

bio	website	gplus.to/ps1
	location	Birmingham, AL
	age	28
visits	member for	2 years
	seen	Jul 30 '12 at 13:32
stats	profile views	56

Urban planning masters student at Georgia Institute of Technology

	855 reputation	bio	website	gplus.to/ps1	visits	member for	2 years
210 badges		location	Birmingham, AL		seen	Jul 30 '12 at 13:32

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Aug 11	comment	Get relative north aligned point 2163 (US Equal Area) No, not necessarily. If you rotate the grid and leave the coordinate system the same, your top will not be due north of your bottom.
Aug 11	comment	Get relative north aligned point 2163 (US Equal Area) It would seem that your grid is north-aligned. It just isn't orthogonal on the screen. Are you asking for a projection that will make your grid both north-aligned and orthogonal?
Aug 10	answered	Converting point data into a weighted raster
Aug 10	awarded	Autobiographer
Aug 10	comment	Create overlapping polygons from contour lines I've accepted whuber's answer, as it gives me exactly what I was looking for, but I think there may be other answers for the general case. Several I had found include using XTools or ET Geowizards to convert the polylines to polygons, or else removing the holes from the non-overlapping polygons.
Aug 10	accepted	Create overlapping polygons from contour lines
Aug 10	comment	How to cluster points based on a kernel density? This solution is simple, quick, and exactly what I was looking for. Thanks.
Aug 10	accepted	How to cluster points based on a kernel density?
Aug 10	awarded	Commentator
Aug 10	comment	Create overlapping polygons from contour lines This answer perfectly solves my problem from yesterday as well. If you post it there, I will accept it as the best answer.
Aug 10	awarded	Scholar
Aug 10	comment	Create overlapping polygons from contour lines This is exactly what I needed, and in fact it's much better than what I hoped for. The watershed tool actually gives me exactly the polygons I was looking for in both questions - a polygon that separates the kernel density raster into regions. The method I was attempting here would have only approximated them using the largest contour that only enclosed one maxima, but it would have left gaps. This is perfect. Thank you!
Aug 10	comment	Create overlapping polygons from contour lines Yes, that's correct. In many forums it seems as though many people have had the opposite problem of trying to convert overlapping polygons to cocentric, non-overlapping ones. (including this particularly thorough one from our own whuber: link)
Aug 10	awarded	Editor
Aug 10	revised	Create overlapping polygons from contour lines Made question more clear
Aug 10	asked	Create overlapping polygons from contour lines
Aug 9	comment	How to cluster points based on a kernel density? And also posted by me, as it turns out.
Aug 9	comment	How to cluster points based on a kernel density? Using a threshold probably won't work here, as I am trying to distinguish centers from other centers immediately adjacent. In the city core, the boundary between the two will have a very high density, but in the suburban fringe, it will have a very low density. But I am hoping that using the second derivative will be effective.
Aug 9	comment	How to cluster points based on a kernel density? Yes, that is a very relevant discussion! I am reading through your MSc thesis and will try out some of the methods.
Aug 9	awarded	Supporter