Identifying Extended High Ridges
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Transcript of Identifying Extended High Ridges
Identifying Extended High Ridges
Identifying Valley Bottom Lands
Identifying Dam Reservoir Extent
Characterizing Major Terrain Features
1) SCAN Elevation Average Ignore -1 Within 3 Circle For Elev_smooth3
Elev_smooth3
3D Grid Display
3D LatticeDisplay
with 2D projection
Elevation
2300
2600
2) DRAIN Entire Over Elev_smooth3 Simply Steepest For Flowmap
4) SCAN Raw_ridges Majority Ignore -1 Within 1 Circle For Ridges
3) RENUMBER Flowmap Assigning 0 To 2 Thru 3000 For Raw_ridges
Ridges aboveMean Elevation
of 2440
5) CLUMP Ridges at 1 diagonally FOR Individual_ridges
Ridges6) COMPOSITE Individual_ridges with Elevation minimum ignore -1for Ridges_minElev
2424
7) RENUMBER Ridges_minElev assigning 0 to 0 thru 2440 assigning 1 to 2440 thru 10000 for High_ridges
9) RENUMBER Slopemap Assigning 1 To 0 Thru 5 Assigning 0 To 5 Thru 100 For Gentle_slopes
10) SCAN Gentle_slopes Majority Ignore -1 Within 1 Circle For Gentle_slopes2
8) SLOPE Elevation Fitted For Slopemap
50%
35%
11) SPREAD High_ridges To 100 Thru Gentle_slopes2 Simply For Expanded_ridges
1) CALCULATE ((Elev_S – 2564) * -1) For Inverted_ElevS3
2) DRAIN Entire Over Inverted_Elev_S3 Simply Steepest For Flow_inverted
3) RENUMBER Flow_inverted Assigning 0 TO 1 Thru 80 Assigning 1 TO 80 Thru 1000 For RawRidges_Inverted
5) CLUMP Ridges_Inverted At 1 Diagonally For IndRidges_Inverted
6) Composite IndRidges_Inverted With Elevation Minimum Ignore -1 For Ridges_minElev_Inverted
4) SCAN RawRidges_inverted Majority Ignore -1 Within 1 Circle For Ridges_Inverted
8) SPREAD High_ridges_inverted To 100 Thru Gentle_slopes2 Simply For Expanded_ridges_inverted
7) RENUMBER Ridges_minElev_Inverted Assigning 0 TO 0 Thru 2440 Assigning 1 TO 2440 Thru 10000 For High_ridges_inverted
Extended High Ridges
…using a Standard Elevation Surface
Extended High Ridges
…using an Inverted Elevation Surface
…similar results
1) SLOPE Elev_smooth3 Fitted For Slopemap
50%
35%
2) RENUMBER Slopemap Assigning 1 To 0 Thru 6 Assigning 0 To 6 Thru 100 For Gentle_slopes
3) SCAN Gentle_slopes Majority Ignore -1 Within 1 Circle For Gentle_slopes2
4) SPREAD WaterTo 36 Thru Gentle_slopes2 Simply For Valley_bottoms
1) RENUMBER Elevation Assigning 2383 To 0 Thru 2383 Assigning 0 To 2383 Thru 10000 For Elev_2383
5) COVER Elevation With Dam_Lake For Elev_dam_lake
2) COVER Elev_2383 With Dam_2390 For Elev_dam
3) CLUMP Elev_dam At 1 Orthogonally For Elev_dam_clumps
4) RENUMBER Elev_Dam _clumps Assigning 0 To 1 Thru 2 Assigning 2383 To 3 Assigning 2390 To 4 Thru 7 For Dam_lake
Characterizing Major Terrain Features
Identifying Extended High Ridges…could include aspect and distance to road in refining best ridges for Wind Power development— how?
Identifying Valley Bottom Lands
…could include vegetation type in the extended riparian zone— how?
Identifying Dam Reservoir Extent
…could calculate reservoir volume capacity at various surface water heights— how?
Just for fun …you’re having fun, right?
Let’s compare the effect of changing a bit of model logic…
The method of determining ridge elevation from—
Minimum Elevation for each candidate ridge
versus
Average Elevation for each candidate ridge
…in determining high ridges
Ridges aboveMean Elevation
of 2440
5) CLUMP Ridges at 1 diagonally FOR Individual_ridges
Ridges6) COMPOSITE Individual_ridges with Elevation minimum ignore -1for Ridges_minElev
2424
7) RENUMBER Ridges_minElev assigning 0 to 0 thru 2440 assigning 1 to 2440 thru 10000 for High_ridges
9) RENUMBER Slopemap Assigning 1 To 0 Thru 5 Assigning 0 To 5 Thru 100 For Gentle_slopes
10) SCAN Gentle_slopes Majority Ignore -1 Within 1 Circle For Gentle_slopes2
8) SLOPE Elevation Fitted For Slopemap
50%
35%
11) SPREAD High_ridges To 100 Thru Gentle_slopes2 Simply For Expanded_ridges
Ridges aboveMean Elevation
of 2440
5) CLUMP Ridges at 1 diagonally for Individual_ridges
Ridges6) COMPOSITE Individual_ridges with Elevation average ignore -1for Ridges_avgElev
2424
7) RENUMBER Ridges_avgElev assigning 0 to 0 thru 2440 assigning 1 to 2440 thru 10000 for High_ridges
9) RENUMBER Slopemap assigning 1 to 0 thru 5 assigning 0 to 5 thru 100 for Gentle_slopes
10) SCAN Gentle_slopes majority ignore -1 within 1 circle for Gentle_slopes2
8) SLOPE Elevation fitted for Slopemap
50%
35%
11) SPREAD High_ridges to 100 thru Gentle_slopes2 simply for Expanded_ridges
Extended Ridges based on
Minimum Elevation
Extended Ridges based on
Average Elevation
…domain expertise is needed to refine any GIS procedure or model
More “fun” …identifying upland, low land and side slopes
1 Not a valley bottomor “Toe Slope”
2 Not an upland ridgeor “Upland Slope”
Upland Ridges
Valley Bottoms
RENUMBER Valley_bottoms assigning 0 to 0 thru 35 assigning 1 to 35 thru 36 for Not_valleyBottom
RENUMBER Upland_ridges assigning 0 to 0 thru 99 assigning 2 to 99 thru 100 for Not_uplandRidge
Compute Not_uplandRidge plus Not_valleyBottomfor Combined_slopes
Combined Slopes