Description Usage Arguments Details Value Examples
lsPreview
shows a preview of the n
-th image from a set of
search results on an interactive map.
1 2 3 4 5 6 7 8 9 |
searchres |
a |
n |
a |
dates |
a vector of |
lpos |
vector argument. Defines the position of the red-green-blue layers to enable false color visualization. |
add.Layer |
logical argument. If |
verbose |
logical argument. If |
... |
arguments for nested functions:
|
The function shows a preview of the n
-th output image from a search
in the Landsat archives (ls7Search
or ls8Search
,
with browseAvailable = "Y"
). The preview is downloaded from
USGS Bulk Metadata Service.
Please, be aware that only some images may have a preview.
this function does not return anything. It displays a preview of one of the search results.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | ## Not run:
# load a spatial polygon object of Navarre
data(ex.navarre)
wdir <- file.path(tempdir(),"Path_for_downloading_folder")
# retrieve jpg images covering Navarre between 2011 and 2013
sres <- ls7Search(startDate = as.Date("01-01-2011", "%d-%m-%Y"),
endDate = as.Date("31-12-2013", "%d-%m-%Y"),
extent = ex.navarre,
precise = TRUE,
browseAvaliable = "Y",
AppRoot = wdir)
lsPreview(sres, 1)
# filter the images with less than 1% pixels covered by clouds
sres.cloud.free = subset(sres, sres$cloudCover < 1)
lsPreview(sres.cloud.free, 1)
lsPreview(sres.cloud.free, 2,add.Layer = TRUE)
# plot all the images in one date
lsPreview(sres.cloud.free,dates=as.Date("2013-09-04"))
## End(Not run)
|
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