maintenance. We started with creating a boundary for our work, Los Angeles County (LAC), one of the largest and most populous counties in the country, covering over 4,000 square miles and being home to around 10 million resi-
dents. We then used zoning data combined with Normalized Difference Vegetation Index (NDVI) satellite data to break down the thousands of acres of turfgrass within LAC into 6 distinct zones: cemeteries, college cam-
puses, commercial, golf courses, public parks & schools, and residential (Figure 1). From there, we gathered numerous published articles that addressed the three key inputs for turfgrass maintenance: fertilizing, irri-
Caption: Figure 1. Area and zones of maintained turfgrass in the city of Monrovia as an example of the spatial analysis. (a) Location of Monrovia within the study area (Los Angeles County) (b) complete coverage of NDVI cells meeting the 0.20 threshold for turf (c) results of the maintenance zone classification (d) results of the overlay of turf cells within maintained zones 57