Process Description:
Data is updated on a continuous basis. GPS coordinate locations for NJEMS sites were collected beginning in 1993. The GPS data was processed (including differential correction) and the resulting site coordinates were passed on to NJDEP DOIT staff who loaded the coordinates into the NJEMS Site Masterfile database. NJDEP permitting staff also entered coordinate data for sites without already existing GPS coordinate values. Address-matched coordinates were generated for sites without coordinates in July and September 2004, using TIGER and GDT roads. The default matching options were selected, including spelling sensitivity: 80, minimum candidate score: 10, minimum match score: 60. Later additional address-matching was done in early February 2009 using Tele Atlas roads. The IDENTITY function was used to append several attributes including MUN, FIPSCO, FIPS, SSN, and KEY from STMUN; and HUC11, HUC14, WMA, WMA_NAME, WREGION, WR_NAME, SW_NAME, and W_NAME from HUC14.