lecture four - distance analysis with vector data, Study notes of Physics

Download lecture four - distance analysis with vector data and more Study notes Physics in PDF only on Docsity! LECTURE FOUR DISTANCE ANALYSIS WITH VECTOR DATA MEASUREMENTS •  Pythagoras's theorem is used to calculate the Euclidean distance between two points LENGTH ? A B C 90° LENGTH 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 ? A B C 22 )()( BCACAB −+−= 22 44 +=AB units 7.5=AB 32=AB 1 2 3 4 PERIMETER 12 11 10 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 DISTANCE NEAREST NEIGHBOR ID   NEAR   DIST   1   2   10   2   4   11   3   7   8   4   5   8   5   3   11   6   4   12   7   4   11   8   22   7   9   2   4   10   14   19   11   13   17   …   …   …   BUFFER ANALYSIS •  The most common form of vector proximity analysis •  One or more zones are created around either points, lines or polygons to illustrate distance from feature