Map Categories, Criteria, and Data

Important Farmland Maps show the relationship between the quality of soils for agricultural production and the land's use for agricultural, urban, or other purposes.  A biennial map update cycle and notation system employed by FMMP captures conversion to urban land while accommodating rotational cycles in agricultural use.

Map Products

Important Farmland Maps are updated and released every two years.  County, regional, and state maps are produced as standard products; many are available as large PDF files as well as in paper format.  For users with GIS capability, Important Farmland data is posted in ESRI shape file format on the Program's FTP site

The newest tool for accessing map and statistical data is the California Important Farmland Finder  (CIFF):

  • Search by county, address, zip code, lat/long coordinates; or the geolocate function on your mobile device. 
  • Place points, digitize areas of interest, create buffers, and obtain Important Farmland acreages. Information and basic instructions are available.

Reports and Statistics

California Farmland Conversion Reports summarize acreage and land use conversion for each two-year update cycle.  Conversion statistics are generated via GIS analysis of individual county data.  This information is aggregated into regional and statewide summaries for the California Farmland Conversion Report. The report's analysis includes comparisons to the prior update period.  Field analyst reports provide more detailed background on the types of change that occurred for individual counties.   

More information regarding the map categories and criteria used to create the Important Farmland maps and data is provided in the links below.

Map Categories, Criteria, and Data Links