Aircraft Image Subsets
The following images are subsets of larger imagery that were acquired over
a study area in Napa Valley. These are false color infrared images where red
represents healthy vegetation and near bare soil appears cyan (blue-green).
Each image was acquired in July of the noted year.
The block in the middle of this image was recently replanted, so it contains
very little vine growth yet. All of the blocks in this image were infested
with phylloxera and show mottled patterns indicating damaged areas within
1993: 2m pixel resolution image
The spatial resolution of this image was coarser than in 1993. The image
has a similar appearance to the one above, but the damaged areas have spread
and two blocks along the top of the image are now cyan, since the vines
there have been pulled out.
1994: 5m pixel resolution image
This image shows more blocks have been pulled out and those that remain may
be pulled by now. In contrast, the blocks in the middle of the image are
well grown and the lower one has full canopy cover.
1995: 3m pixel resolution image
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