California Rapid Assessment Method (CRAM; an assessment method for monitoring the condition of wetlands) spatial data was sourced from EcoAtlas.

Data was sourced from LA County's Natural History Museum (NHM). Data on current ongoing programs were reported for January 1st, 2018 – November 15th, 2018. Data on specific challenge projects were reported for all years they occurred (2016, 2017, 2018), but each project has a different timescale. The El Nino SnailBlitz was 3 months, but all other SnailBlitzes and RASCalsBlitz were only 2 months long. The City Nature Challenge was the shortest project lasting only 3-5 days.

California Rapid Assessment Method (CRAM; an assessment method for monitoring the condition of wetlands) spatial data was sorted from the EcoAtlas and combined with shapefile data from LA County to depict the CRAM scores was created for each point.
CRAM data was sorted to only include sites within LA County. These sites were then sorted by watershed and by land use and presented as a percentage of sites per score.

Classifies gross area of documented natural areas across LA County.
CalVeg only covers 69% of LA County and therefore the National Gap Analysis Project data must be combined to cover the remaining 31% of LA County.

Publicly accessible data on the size and location of all existing parks, recreational facilities, open space and natural areas was collected through collaboration between the Departments of Parks and Recreation with 86 cities to complete a countywide inventory of existing parks. A total of 3,023 parks were inventoried countywide.