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1
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# download unzip and tif conversion of the Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010)
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2
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# setting working directory
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3
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4
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INDIR=/mnt/data2/dem_variables/GMTED2010
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5
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cd $INDIR
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6
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7
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# download all the zip file from http://topotools.cr.usgs.gov/gmted_viewer/gmted2010_global_grids.php
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8
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# using multiprocess approch
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9
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url=http://gmted.cr.usgs.gov/gmted/Grid_ZipFiles/
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10
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echo $url"be75_grd.zip" $url"ds75_grd.zip" $url"md75_grd.zip" $url"mi75_grd.zip" $url"mn75_grd.zip" $url"mx75_grd.zip" $url"sd75_grd.zip" | xargs -n 1 -P 7 wget -d /mnt/data2/dem_variables/GMTED2010/zip/ $1
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11
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12
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# unzip the file using multiprocess approch
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13
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14
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ls /mnt/data2/dem_variables/GMTED2010/zip/*.zip | xargs -n 1 -P 7 bash -c $'
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15
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16
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dir=`basename $1 .zip`
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unzip -d /mnt/data2/dem_variables/GMTED2010/tiles/$dir $1
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18
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' _
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20
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21
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# transform to tif and tiling them using multiprocess approch
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22
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# be75_grd.zip Breakline Emphasis , 7.5 arc-seconds
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23
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# ds75_grd.zip Systematic Subsample , 7.5 arc-seconds
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24
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# md75_grd.zip Median Statistic , 7.5 arc-seconds
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25
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# mi75_grd.zip Minimum Statistic , 7.5 arc-seconds
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26
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# mn75_grd.zip Mean Statistic , 7.5 arc-seconds
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# mx75_grd.zip Maximum Statistic , 7.5 arc-seconds
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28
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# sd75_grd.zip Standard Dev. Statistic, 7.5 arc-seconds
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29
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30
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echo be75_grd ds75_grd md75_grd mi75_grd mn75_grd mx75_grd sd75_grd | xargs -n 1 -P 7 bash -c $'
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31
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dir=$1
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32
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INDIR=/mnt/data2/dem_variables/GMTED2010/tiles/$dir
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33
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for nx in `seq 0 9` ; do
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34
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for ny in `seq 0 4` ; do
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35
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xoff=$(echo 17280 \* $nx | bc)
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yoff=$(echo 13440 \* $ny | bc)
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xsize=17280
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ysize=13440
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39
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gdal_translate -srcwin $xoff $yoff $xsize $ysize -co COMPRESS=LZW $INDIR/$dir $INDIR"_tif"/$nx"_"$ny.tif
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40
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done
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41
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done
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42
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' _
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43
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44
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# at the end fo this process the 50 tiles tiff has been created for each of the defined component
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