Filter Small

Download Model
Download the .scn, .sel and .lse files by clicking on the following link:

Model Code Exploration
In the following sections we will examine all of the model files for this model. Note that instead of downloading the zip file above, you could just copy the text in the boxes below into a text editor and save it with the appropriate name (Section title). Opening the resulting .scn file in the SELES simulator would run this model.

FilterSmall.scn
SELES Scenario $gisData$ = ..\..\CaseStudy\gisData\cell PatchLayer = $gisData$\Old_bF Model Dimensions: PatchLayer filterSmall.sel sizeThreshold = 100

FilterSmall.sel
Seles Model Time Units: Step KiloStep 1000 2 Landscape Events: findSmall.lse deleteSmall.lse Spatial Constants: PatchLayer Spatial Variables: FilteredPatchLayer[1] <= 0 Visited[2] <= 0 Global Variables: // Size threshold (in cells) sizeThreshold = 100 numFilteredPatches = 0 numFilteredCells = 0 numUnfilteredPatches = 0 numUnfilteredCells = 0 PatchType = 1 Output Frequency: 1

FilterSmall.lse
// Find small patches out of a layer LSEVENT: FindSmall DEFINITIONS GLOBAL VARIABLE: PatchType LAYER: PatchLayer, FilteredPatchLayer, Visited GLOBAL VARIABLE: sizeThreshold GLOBAL VARIABLE: numUnfilteredPatches, numUnfilteredCells CLUSTER VARIABLE: currPatchSize LOCAL: cps ENDDEF INITIALSTATE FilteredPatchLayer = IF (PatchLayer EQ PatchType) THEN 1 ELSE 0 INITIALSTATE = 1 ENDIS RETURNTIME = 0 PROBINIT PROBINIT = (FilteredPatchLayer EQ 1) AND (Visited EQ 0) currPatchSize = 0 numUnfilteredPatches = numUnfilteredPatches + (Visited EQ 0) numUnfilteredCells = numUnfilteredCells + 1 cps = 0 ENDPI TRANSITIONS TRANSITIONS = (Visited EQ 0) AND (FilteredPatchLayer EQ 1) Visited = 1 currPatchSize = currPatchSize + 1 cps = currPatchSize ENDTR SPREADLOCATION REGION CENTRED(1, 1.5) DECISION (Visited EQ 0) AND (FilteredPatchLayer EQ 1) ENDSL SPREADTIME = -1 ENDCLUSTER IF (0 < cps < sizeThreshold) Visited = 2 ENDFN ENDCLUSTER = 1 ENDEC

Suggested Experiments
To explore this cellular automata model further, try the following: