I'm having a hard time understanding the information that can be stored in a BLOB.

It's pretty self-evident that SHAPE_Area has a numerical value, but is the actual classification a BLOB or Number?


From the Layer Properties of this file geodatabase feature class you can see that SHAPE_Area is of data type Double. It is not stored as a BLOB.

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If you are referring to a geometry when you say blob here, then for geodatabases, but not shapefiles, the area is dynamically updated when the geometry is edited.

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    The value is only dynamic when it's a property of the data source. And it's only represented in the units of the source's coordinate reference (e.g., as square degrees in a GCS). If the shapefile is loaded into another format, or even a different shapefile, and the conversion makes the dynamic field a permanent in a new table, then it will no longer be dynamic. – Vince Feb 25 '18 at 15:29

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