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Kern County Department of Agriculture and Measurement Standards

County of Kern
Agriculture and Measurement Standards
Spatial Analysis
Cropping Pattern
Kern County Spatial Data
The Kern County Department Of Agriculture And Measurement Standards began digitizing annually permitted crop boundaries in 1997. Customized programming integrated the spatial data with tabular permit information to enhance the Department's ability to assess permitted acreage and proposed chemical applications on a site-by-site basis. Since 2000, local growers have worked with Inspectors to interactively map permitted sites through a customized GIS interface developed in the Department. Growers obtain a map atlas at the conclusion of this process. Growers and the public have access to the digital shapes, permit data, and use reports. The Department provides no technical support for these data. Problems with the download/unzip process should be directed to GIS Programmer/Analyst Mark Sabin at sabinm@co.kern.ca.us.
Datum and Projection
Notes:
  • Data are available in ESRI format shapefiles.
  • Although every effort has been made to accurately locate crop boundaries, the Kern County Department Of Agriculture And Measurement Standards in no way guarantees the accuracy of these data.
  • To view a given year's data, right-click the year and save the file to your computer, then double-click the saved file and follow the prompts to extract its contents. If you encounter problems downloading or opening these files please contact Mark Sabin.
  • Please consult the metadata provided with each file to answer questions about the contents - the Department provides no technical support in this area.
  • Multipart and duplicate polygons have been removed from each database. If you merge data, concatenating the pmt_site and pmt_year fields will uniquely identify each polygon in the merged database.
Annual Data
Year Sites Mapped Sites Permitted % Mapped Rotation Interplants Multiples % Use Reports
1997 9,447 12,793 74 N N N 83.5
1998 10,311 13,309 77 N N N 89.5
1999 12,868 13,074 98 N N N 99.9
2000 13,483 13,483 100 Y N N 100
2001 13,336 13,336 100 Y N N 100
2002 13,217 13,217 100 Y Y N 100
2003 13,162 13,162 100 Y Y N 100
2004 12,946 12,946 100 Y Y N 100
2005 12,803 12,803 100 Y Y Y 100
2006 12,923 12,923 100 Y Y Y 100
2007 13,257 13,257 100 Y Y Y 100
2008 13,477 13,477 100 Y Y Y 100
2009 13,081 13,081 100 Y Y Y 100
2010 13,150 13,150 100 Y Y Y 100
2011 13,599 13,599 100 Y Y Y 100
2012 13,942 13,942 100 Y Y Y 100
2013 13,997 13,997 100 Y Y Y 100
2014 13,906 13,906 100 Y Y Y 100
2015 14,057 14,057 100 Y Y Y 100
2016 14,017 14,017 100 Y Y Y N/A
2017* 11,241 11,241 100 Y Y Y N/A
* Updated March 24, 2017
Note: The current year crop layer will not be complete until mid-February of the following calendar year.
All Completed Spatial Datasets
Download all permitted shapes from 1997 through 2016 (32,600 KB).
Datum and Projection
NAD_1983_StatePlane_California_V_FIPS_0405_Feet
Projection: Lambert_Conformal_Conic
False_Easting: 6561666.66666667
False_Northing: 1640416.66666667
Central_Meridian: -118.00000000
Standard_Parallel_1: 34.03333333
Standard_Parallel_2: 35.46666667
Latitude_Of_Origin: 33.50000000
Linear Unit: Foot_US
Geographic Coordinate System: GCS_North_American_1983
Datum: D_North_American_1983
Prime Meridian: Greenwich
Angular Unit: Degree
Definitions
Year:
Calendar year the database represents. Note that there will be sites for which the dt_act is before January 1 in almost every database, as growers begin to obtain permits in mid-December for the following year.
Sites Mapped:
Number of individual polygons in the database for that particular year. Each polygon represents a contiguous planting of one commodity in one section treated using the same cultural practices. The only exceptions to this rule are interplants and multiples, as explained below.
Sites Permitted:
Total number of sites in the tabular database. Beginning in the year 2000 the number of spatial and tabular entries match one-to-one.
% Mapped:
Ratio of sites mapped to sites permitted.
Rotation:
Ability of the dataset analyst (you) to track change over time in the spatial database. Beginning in the year 2000 each supplemented site throughout the year was entered into the spatial database on the same day we entered the new site into the tabular database. By querying on the dt_act and dt_inact fields the analyst can re-create the permitted site configuration for any given day during the year.
Interplants:
Cropping pattern in which one grower permits exactly two commodities for the same piece of ground at the same time. This typically involves a young permanent crop with another crop planted in the area between the rows. See the metadata for the column s_status for more information.
Multiples:
Cropping pattern in which there are numerous small plantings on one crop site. This typically involves a few rows of many different vegetables planted too closely together to be individually digitized. You must consider this cropping pattern when calculating acreage, as each different commodity/planting is assigned the fully permitted acreage in both the spatial and tabular data. The spatial database may contain a dozen or more polygons active at the same time for a particular location. See the metadata for the column s_status for more information.
% Use Reports:
Indicates the percentage of pesticide use reports (available here) that can be mapped to the site polygons available for download on this page. Associate the tabular use reports to the spatial data through the Pmt_Site field.
 

 

Last Modified
7/27/2017
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