The Hugag is a curious mythical beast with strong preferences for terrain configuration:
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Transcript of The Hugag is a curious mythical beast with strong preferences for terrain configuration:
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The Hugag is a curious mythical beast with strong preferences for terrain configuration:
Prefers low elevations (severe nose bleeds at higher altitudes) Prefers gentle slopes (fear of falling over and unable to get up) Prefers southerly aspects (a place in the sun)
Supplemental Slide Set for GeoWorld Beyond Mapping Column, August 2004
See http://www.innovativegis.com/basis/MapAnalysis/Default.html, select Topic 22
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
…how would you map Hugag habitat?
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Too Steep
Manual Drafting
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Not southerly
Manual Drafting
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Too High
Manual Drafting
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Manual Drafting – McHarg Overlay
Too Steep
Too Steep
ManualMap Overlay
Not Southerly
Not Southerly
Too High
Too High
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Too Steep= 0
Computer Solution
= 1
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Not southerly= 0
Computer Solution
= 1
= 1
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
Too High= 0
Computer Solution
= 1
= 1
= 1
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
= 1
= 1
= 1
Binary Overlay
Times1 * 1 * 1 = 1
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Hugags like…
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
0 1500ft
= 1
= 1
= 1
Ranking Overlay
Plus1 + 1 + 1 = 3
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0 1500ft
Gentle Slopes (under 30%)
Southerly Aspects (E-W orientation)
Lower Elevations (under 1800 feet)
= 1
= 4
= 2
Plus1 + 2 + 4 = 7
124
Binary-Progression Overlay
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0 1500ft
GentleSlopes = 5.0 (22%)
SoutherlyExposed = 6.0 (West)
LowerElevation = 5.0 (1,300)
Average5.0 + 6.0 + 5.0 = 5.3
Hugags like… (on a scale of 1 worst to 9 best)
Rating Overlay (Goodness Scale 1 to 9)
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0 1500ft
Constraints Overlay
Covertype
Water MaskWater= 0Land= 1
HabitatRatingBad= 1 toGood= 9
Good 9
Bad 1
OK= 4.5
Lake 0
Water = 0 times any Habitat Rating = 0
Lakes
Hugags like…
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Hugags like… Gentle Slopes, Southerly Aspects, Lower Elevations
Best Habitat
Suitability draped over 3D plot of Elevation
(West)
(South)
Applying the Average Suitability model to a larger area shows its strong relationship to terrain configuration. Note that the areas of best habitat (dark green) occur on the fairly gentle slopes that are southerly oriented and at lower elevations. Note that the worst areas (bright red) occur on steep, northerly slopes at higher elevations.
Best Habitat