Table 1 Comparison of Areas in Hectares for Buffers at 400, 1600, and 3000 Meters
A. Sausage Buffer | B. ArcGIS 9.3,Gen., Trim a, b | Ratio of B/A | C. ArcGIS 9.3, Gen., No Trim a, b | Ratio of C/A | D. ArcGIS 9.3, Detailed, Trim b | Ratio of D/A | E. ArcGIS 9.3, Detailed, No Trim a, b | Ratio of E/A | F. ArcView 3.3 | Ratio of F/A | |
|---|---|---|---|---|---|---|---|---|---|---|---|
400 m c, d | |||||||||||
Mean | 33.3 | 25.6 | 0.8 | 22.4 | 0.7 | 24.8 | 0.7 | 24.5 | 0.7 | 25.5 | 0.8 |
Std. dev. | 4.9 | 4.7 | 6.1 | 5.1 | 5.4 | 6.6 | |||||
Median | 35.2 | 26.8 | 24.7 | 26.6 | 26.5 | 28.1 | |||||
Min. | 14.9 | 6.5 | 1.2 | 7.0 | 2.0 | 1.7 | |||||
Max. | 40.3 | 35.8 | 31.1 | 35.1 | 41.0 | 36.0 | |||||
1600 m | |||||||||||
Mean | 455.0 | 408.8 | 0.9 | 416.9 | 0.9 | 400.6 | 0.9 | 416.4 | 0.9 | 469.3 | 1.0 |
Std. dev. | 77.4 | 77.6 | 69.7 | 76.8 | 66.7 | 70.0 | |||||
Median | 476.9 | 429.8 | 437.0 | 421.2 | 435.1 | 489.8 | |||||
Min. | 68.1 | 35.6 | 22.5 | 43.0 | 72.0 | 55.7 | |||||
Max. | 577.7 | 531.9 | 525.4 | 530.4 | 533.4 | 589.2 | |||||
3000 m | |||||||||||
Mean | 1593.6 | 1495.0 | 0.9 | 1565.6 | 1.0 | 1478.0 | 0.9 | 1550.0 | 1.0 | 1758.0 | 1.1 |
Std. dev. | 240.0 | 243.7 | 196.1 | 239.8 | 190.4 | 197.7 | |||||
Median | 1660.7 | 1557.3 | 1615.5 | 1542.2 | 1597.1 | 1806.7 | |||||
Min. | 258.7 | 171.2 | 297.1 | 189.0 | 317.8 | 429.4 | |||||
Max. | 1977.8 | 1871.7 | 1892.5 | 1867.3 | 1875.2 | 2166.5 |