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Lab 4 Part 3: LakeGT5_ID Creation - Coggle Diagram
Lab 4 Part 3: LakeGT5_ID Creation
Input Layers:
→ gnp_lakes (polygon; TYPE + Area attributes)
→ DEM (elevation raster)
Select Lakes by Attributes
→
Tool:
Select By Attributes →
Condition
: Area > 5 hectares AND TYPE = any lake
→
Output
: Selected lakes (>5 ha)
Convert Selected Lakes to Raster
→
Tool
: Feature to Raster
→
Input:
Selected lakes
→
Field:
unique ID (or OBJECTID)
→
Output:
LakesRaster
Reclassify Elevation
→
Tool:
Reclassify
→
Input:
DEM
→
Condition
: > 2200 m = 1, ≤ 2200 m = NoData
→
Output:
ElevGT2200
Extract Lakes Above 2200 m
→
Tool
: Raster Calculator
→
Expression
: LakesRaster * ElevGT2200
→
Output:
LakeGT5_ID
→ Final Output
→ LakeGT5_ID (unique ID raster of lakes meeting ALL criteria)