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Codebook - 2020 Washtenaw County Opportunity Index
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Note: ArcGIS software generates multiple fields during the process of plotting data spatially. These quantify area and shapes, and add additional unique identification tags, but will not generally be useful.

Feel free to ignore the following, generated for each layer by ArcGIS, which are not part of the dataset:
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OBJECTIDUnique code automatically generated for each record in a single layer.
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STATEFPTwo-digit code identifying state
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COUNTYFP
Three-digit code identifying county
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TRACTCESix-digit code identifying tract
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AFFGEOID
Code identifying area within globe
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LSADLegal/Statistical Area DescriptionCodes: https://www2.census.gov/geo/pdfs/reference/LSADCodes.pdf
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ALANDArea, in square meters, of land in tract (2010 Census)
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AWATERArea, in square meters, of water in tract (2010 Census)
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Shape_Leng
Length of feature, in units of the layer coordinate system
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GEOID_Doub
Duplicate of GEOID
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