[Tufts] Geospatial data ingest

[kzollove]

From any external source, a demonstration of Gaia's capacity to ingest and transform external data.

Environmental Justice Index or Social Vulnerability Index may be a good option for this iteration.

Considerations: Gaia operates in a Postgres database. This is the first step that will be performed outside of Tufts' Databricks. This may cause challenges down the line. If necessary, this would be the first step to start making Gaia "database agnostic".