Add helpful language for "error: unknown/unsupported geography heirarchy"

hrecht / censusapi

R package to retrieve U.S. Census data and metadata via API

https://www.hrecht.com/censusapi/

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Add helpful language for "error: unknown/unsupported geography heirarchy" #27

Closed hrecht closed 6 years ago

hrecht commented 7 years ago

The "error: unknown/unsupported geography heirarchy" error message that the APIs often throw isn't very descriptive. This package should add some instructions for users when that error is thrown, directing them to geography documentation and examples.