|
1
|
# Quick script to determine whether the filename of each downloaded
|
|
2
|
# ASTER tile is faithful to its spatial location as specified in the
|
|
3
|
# GeoTIFF itself.
|
|
4
|
#
|
|
5
|
# This script is written to run on eos, based on the file system
|
|
6
|
# location of downloaded ASTER tiles as of 04-Aug-2011
|
|
7
|
#
|
|
8
|
# Jim Regetz
|
|
9
|
# NCEAS
|
|
10
|
# Created on 04-Aug-2011
|
|
11
|
|
|
12
|
library(rgdal)
|
|
13
|
|
|
14
|
# for a given file, return TRUE if file name matches the internally
|
|
15
|
# specified lower left corner, otherwise return string with those
|
|
16
|
# coordinates
|
|
17
|
check <- function(tilename, path=".", silent=TRUE) {
|
|
18
|
# build expected filename
|
|
19
|
origin <- round(GDALinfo(file.path(path, tilename),
|
|
20
|
silent=silent)[c("ll.x", "ll.y")])
|
|
21
|
ly <- origin["ll.y"]
|
|
22
|
y <- sprintf("%s%02d", if (ly>=0) "N" else "S", abs(ly))
|
|
23
|
lx <- origin["ll.x"]
|
|
24
|
x <- sprintf("%s%03d", if (lx>=0) "E" else "W", abs(lx))
|
|
25
|
expected.name <- paste("ASTGTM_", y, x, "_dem.tif", sep="")
|
|
26
|
# compare to actual filename
|
|
27
|
if (tilename==expected.name) {
|
|
28
|
TRUE
|
|
29
|
} else {
|
|
30
|
paste(y, x)
|
|
31
|
}
|
|
32
|
}
|
|
33
|
|
|
34
|
# produce vector of check results, with the actual file names as vector
|
|
35
|
# element names (takes ~12 minutes on eos)
|
|
36
|
aster.tiles <- list.files("~organisms/DEM/asterGdem",
|
|
37
|
pattern="^ASTGTM.*_dem.tif$")
|
|
38
|
tilecheck <- sapply(aster.tiles, check)
|
|
39
|
|
|
40
|
# report mismatches
|
|
41
|
data.frame(expected=tilecheck[tilecheck!="TRUE"])
|
|
42
|
## expected
|
|
43
|
##ASTGTM_N59E069_dem.tif N63 E109
|
|
44
|
##ASTGTM_N63E113_dem.tif N69 E107
|
|
45
|
##ASTGTM_N63E117_dem.tif N69 E113
|
|
46
|
##ASTGTM_N64E098_dem.tif N70 E117
|
|
47
|
##ASTGTM_N65E104_dem.tif N73 E084
|
|
48
|
##ASTGTM_N65E111_dem.tif N73 E098
|
|
49
|
##ASTGTM_N65E117_dem.tif N66 E130
|
