@article{May:330018,
      recid = {330018},
      author = {May, George},
      title = {Evolution of Land Cover Definitions and Survey for the  Economics and Statistics Service},
      address = {1981-06},
      number = {1478-2023-077},
      pages = {16},
      year = {1981},
      abstract = {Excerpts from the Introduction:  The sampling strategy and  techniques employed in the June Enumerative Survey (JES)  provides a capability to obtain accurate crop acreage  estimates.  This approach is well established and is a main  vehicle for obtaining state and national data for major  crops.  During the last two decades land management and  land use planning have become important factors in the  American society.  The loss of prime agriculture land,  increased urbanization, and deforestation are only a few of  the concerns facing this Nation.  The type and amount of  land covers currently positioned on the landscape are  critical elements of land use management.  From this need  for land cover information arose the question as to whether  or not the JES could be expanded to provide acreage  estimates for non-crop land cover types.  USDA/ESS has no  mandate to collect and report data on land cover types,  except crops.  Other federal and state agencies such as  SCS, FS, and USGS have responsibilities to provide non-crop  data.  But, if ESS could provide land cover information to  these users, then the basic “core costs” of materials and  processing can be spread over a wider benefit base.  As the  Landsat crop area estimates move from the research mode  into a production effort, the benefits anticipated for  providing land cover data will help justify costs of  Landsat regression estimates.},
      url = {http://ageconsearch.umn.edu/record/330018},
      doi = {https://doi.org/10.22004/ag.econ.330018},
}