2. 1. (set) a. b. c. d. e. f. 2. 3. (intersect)AB = { x Aandx B
} A, B (union)AB = {x Aorx B} /(difference)AB = {xA | xB} (clip)A*B
A (buffer) (dissolve)AB A,B 4. A B (intersect) (union)A B ()
(dierence) A B A B 1. 5. A B (clip) (buer) (dissolve)A B A B A B 1.
6. 1.1 A B 1. A, BAB = { x Aandx B } 7. 1.1 A B a id name 1 square
b id name 1 circle a b id name id_2 name_2 1 square 1 circle AB; x
B 1. 8. 1.1 A B A, B A B 1. 9. A: ; B: 1. QGIS 2. 3. > >
(Intersect) A B 1. 10. 1 2 3 1. 2. 3. A B 1. 11. >(Intersect) A
B 1. 12. 1.2 1. A, B AB = { x Aorx B } 13. 1.2 a id name 1 square b
id name 1 circle a b id name id_2 name_2 1 square NULL* NULL NULL
NULL 1 circle AB; x B AB; x A *NULL 1. 14. 1.2 1. QGIS 2. > >
(Union) A: ; B: 26 1. 15. + = 1.2 1. 16. 1.2 2 1. QGIS * 2. >
> (Union) 1. * TWD97 TM2 WGS84 17. 1. 18. 1.3 A B 1. A B ( A B A
19. 1.3 A B 1. QGIS 2. > > (Difference) 1. 20. 1.3 A B 1. 21.
1.4 1. A B A B x A x B a id name 1 square b id name 1 circle a b id
name 1 square AB; x A 22. 1.5 10km A B A B 1. 23. 1.5 (1) 1. 2.
> > 3. A B A B 1. 24. 1.5 A B A B 1. 25. 1.6 (dissolve)A B 1.
AB 26. 1.6 A B 1. 1. QGIS 2. > > 3. 27. 1. 28. (convex hull)
(symmetric difference) 29. ! ! 30. 1. QGIS 2. > > (convex
hull) 31. 1. Podani, J. (2009) Convex hulls, habitat filtering, and
functional diversity: mathematical elegance versus ecological
interpretability. Community Ecology 10(2): 244250 2. Cornwell, W.
K., Schwilk, D. W, Ackerly D. (2006) A trait-based test for habitat
filtering: convex hull volume. Ecology 87(6): 14651471 3. Getz,
Wayne M. and Wilmers, C. C. (2004) A local nearest-neighbor
convex-hull construction of home ranges and utilization
distributions. Ecography 27(4): 489 505 32. A B A B ! A B A B A B =
(A [ B) (AB) A B A B - = 33. 1. (Intersect) 2. 3. 34. (1) 1. 2. 3.
35. (2) 36. http://www.iot.gov.tw/
ct.asp?xItem=154948&ctNode=1091
