2001, 2002, and 2003. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This point shapefile represents all air monitoring stations active in California from 2001 until 2003. The data within the shapefile was obtained f... California. Air Resources Board.
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2002, 2003, and 2004. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This point shapefile represents all air monitoring stations active in California from 2001 until 2003. The data within the shapefile was obtained f... California. Air Resources Board.
United States, Hydrographic Office. U.S. Navy Hydrographic Office. Shows distances in nautical miles. "Printed: June 1943." North America at the center. Includes text and nautical-mil... The Office.
2011. California. Department of Transportation. Aeronautics Program. This line shapefile represents airport runways in California. These are runways for which the Department of Transportation (Caltrans) HQ Aeronautic... California. Department of Transportation.
2011. United States. Bureau of Transportation Statistics and United States. Federal Aviation Administration. The Airport Runways database is a geographic dataset of runways in the United States and its Territories containing information on the physical cha... United States. Bureau of Transportation Statistics.
2012. Geological Survey (U.S.). This point shapefile includes airports in the United States, Puerto Rico and the U.S. Virgin Islands. The data were derived from an extract of the ... Geological Survey (U.S.).
2011. United States. Bureau of Transportation Statistics and United States. Federal Aviation Administration. This point shapefile depicts aircraft landing facilities in the United States and United States Territories. Attribute data is provided on the phys... United States. Bureau of Transportation Statistics.
2000. This raster dataset represents the average yield for alfalfa crops in tons per hectare. Croplands cover ~15 million km2 of the planet and provide t... University of Minnesota. Institute on the Environment.
2000. This raster dataset represents the agricultural census data quality for alfalfa forage crop yields. Data quality categories include (0= missing, 0.... University of Minnesota. Institute on the Environment.
2000. This raster dataset represents the average yield for alfalfa forage crops in tons per hectare. Croplands cover ~15 million km2 of the planet and pr... University of Minnesota. Institute on the Environment.