GIS4301_Lecture_04 - GIS4301C GISforEnvironmentalStudies...

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GIS4301C GIS for Environmental Studies Spring 2011 Michael J. Gilbrook, GISP, AICP Frank Salmon, GISP Lecture 04 Exercise 03 - Change Detection Exercise
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Spring 2011 Lecture #04 Slide Number 2 Join Class Names Table To Rasters
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Spring 2011 Lecture #04 Slide Number 3 VALUE = Join Field
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Spring 2011 Lecture #04 Slide Number 4 Compare Counts, Note Change
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Spring 2011 Lecture #04 Slide Number 5 How To Compare LC Rasters? Both Rasters Use Identical  Land Cover Classes If No Change, 1987 Class  Will = 2003 Class If Change Occurs, Classes  Will Differ To Create Change Matrix Multiply 1987 value x 10 Add to 2003 value 2-digit code signifies change 66 65 64 63 62 61 56 55 54 53 52 51 56 45 44 43 42 41 36 35 34 33 32 31 26 25 24 23 22 21 16 15 14 13 12 11 1 2 3 4 5 6 1 2 3 4 5 6 2003 Land Cover 1987 Land Cover Where land cover doesn’t  change, value in 1987 =  value in 2003 as shown in  red cells Codes whose digits are not the  same indicate change in land  cover between 1987 and 2003,  such as conversion of Forested  Wetlands (5) to Urban (1) = 51
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Spring 2011 Lecture #04 Slide Number 6 Create New ArcToolbox Toolbox
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Spring 2011 Lecture #04 Slide Number 7 Create New Model
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Spring 2011 Lecture #04 Slide Number 8 Add LC87 Data & “Times” Tool
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Spring 2011 Lecture #04 Slide Number 9 Use “Plus” Tool To Add Rasters
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Spring 2011 Lecture #04 Slide Number 10 Run Model To Create “Delta” Raster
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Spring 2011 Lecture #04 Slide Number 11 Output Raster Appears Continuous
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Spring 2011 Lecture #04 Slide Number 12 Set Symbology To Unique Values
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GIS4301_Lecture_04 - GIS4301C GISforEnvironmentalStudies...

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