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Image was obtained from the USGS EarthExplorer database online. Each 2012 image was orthorectified and georeferenced prior to our analysis. The 2012 images were used for reference images and coordinate systems for the unreferenced images we used (from 1938 and 2012). For all photos (1938, 1978, 2012) we manually identified vegetation to three classes (grass, shrub, tree) at >350 random points across the Dangermond Preserve.
Year: 2012
Flight: 3412028
Image: NE-10-1-20120519
"This data set contains imagery from the National Agriculture Imagery Program (NAIP). NAIP acquires digital ortho imagery during the agricultural growing seasons in the continental U.S.. A primary goal of the NAIP program is to enable availability of of ortho imagery within one year of acquisition. NAIP provides four main products: 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP); 2 meter GSD ortho imagery rectified to within +/- 10 meters of reference DOQQs; 1 meter GSD ortho imagery rectified to within +/- 6 meters to true ground; and, 2 meter GSD ortho imagery rectified to within +/- 10 meters to true ground. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300 meter buffer on all four sides. NAIP quarter quads are formatted to the UTM coordinate system using NAD83. NAIP imagery may contain as much as 10% cloud cover per tile."
Image was obtained from the USGS EarthExplorer database online. Each 2012 image was orthorectified and georeferenced prior to our analysis. The 2012 images were used for reference images and coordinate systems for the unreferenced images we used (from 1938 and 2012). For all photos (1938, 1978, 2012) we manually identified vegetation to three classes (grass, shrub, tree) at >350 random points across the Dangermond Preserve.
Year: 2012
Flight: 3412028
Image: NE-10-1-20120519
"This data set contains imagery from the National Agriculture Imagery Program (NAIP). NAIP acquires digital ortho imagery during the agricultural growing seasons in the continental U.S.. A primary goal of the NAIP program is to enable availability of of ortho imagery within one year of acquisition. NAIP provides four main products: 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP); 2 meter GSD ortho imagery rectified to within +/- 10 meters of reference DOQQs; 1 meter GSD ortho imagery rectified to within +/- 6 meters to true ground; and, 2 meter GSD ortho imagery rectified to within +/- 10 meters to true ground. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300 meter buffer on all four sides. NAIP quarter quads are formatted to the UTM coordinate system using NAD83. NAIP imagery may contain as much as 10% cloud cover per tile."