SAMPLE_TYPE	COLUMN_NAME	LABEL	RANGE_LOW	RANGE_HIGH	LEGAL_VALUES
COLUMN	DATE_COL	Date the site visit occurred			
COLUMN	FLAG	Data flag			
COLUMN	IND_DOMAIN	"Name of indicator group within a study. Valid values are EXTENT (all sites evaluated), CORE (all sites sampled for main indicators), HAND for hand-picked"			
DESIGN	IND_DOMAIN	"Name of the indicator group within a study or Domain within a study. Text with all sites expected to be assigned to EXTENT, and CORE assigned to Target_Sampled sites.  Hand-picked sites are assigned \HAND.\""  Other values will occur when a particular group of indicators is only sampled on a planned probability subsample for the main STUDY.   No missing or \""blank\"" values allowed."			
"			EXTENT|CORE|HAND"""					
COLUMN	PLOT	Plot number of sample			
DESIGN	PSTL_CODE	"State two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands.  No missing or \blank\"" values allowed."""			
COLUMN	PUBLICATION_DATE	Date of data file publication			
COLUMN	SAMPLE_TYPE	Code identifying sample type			
DESIGN	SITE_ID	"Unique Site ID for the study and design cycle sampled. Preferred form is NWCnn_MM-xxxxx  where  nn is current cycle year (11, 16, 21), MM is two letter state code, and xxxxx is between 10001 and 99999.  No missing or \blank\"" values allowed."""			
DESIGN	STUDY	Study conducted as part of NWCA. NWCA is main study identifying the core NWCA study. A unique site may belong to multiple studies. A study may be a state-specific design where not all the sites are included in NWCA.   No missing or blank values allowed.			Coastal Watersheds|NWCA|Prairie Pothole
COLUMN	UID	Unique site visit ID			
COLUMN	UNIQUE_ID	"Unique site ID based on location that does not depend on year sampled or any other factor. Form is NWC_ss_nnnnn  where ss state and nnnnn is number that starts at 10001.   No missing or \blank\"" values allowed. NA"""			
VEGPLOT	VEG_PLOT_LAT	Latitude of Veg Plot	24.5	99.2	
VEGPLOT	VEG_PLOT_LON	Longitude of Veg Plot	-161.07	-67.6	
COLUMN	VISIT_NO	Sequential visit in each year