TO-DO:
-Validations include merging columns for growth form, full taxonomic data,
finding and fixing outliers/typos for DBH and species ID, missing values (SPP or DBH),cd etc.
-Write stem census mapping code
-Matching 1976 and 1996 data partially accomplished with prematched IDs and plot indexing. Integrate species and DBH information
-Integrate with prior census data for standardized metadata
-Large tree species determination based on stem map
DONE: -Write code to pull down Google Sheets raw data and perform validations, outputting cleaned data