Created
September 30, 2016 17:50
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| #!/usr/bin/env zsh | |
| tempfile=/tmp/${${2##*/}%.*}.temp.tiff | |
| # pi=3.1415926536 | |
| # h=35785831.00 # default | |
| # h=35939462.66 | |
| h=35862958.67 # <- correct | |
| # r_a=35000.0 | |
| # a=6378137.0 | |
| # b=6356752.31414 | |
| # width=4400.0 # 11000.0 | |
| # height=width | |
| # padding_x=26.0 #65.0 #20.0 | |
| # padding_y=35.0 #87.0 #27.0 | |
| def="+proj=geos +lon_0=140.7 +lat_0=0.0 +x_0=0.0 +y_0=0.0 +h=${h} +ellps=WGS84 +datum=WGS84 +units=m" | |
| # phi1=1.419222962 # $(python -c "from math import acos; print acos( $a / ($a+$h) )" ) | |
| # sinphi1=0.9885347335 # $(python -c "from math import sin; print sin( $phi1 )" ) | |
| # phi2=1.419735066 # $(python -c "from math import acos; print acos( $b / ($a+$h) )" ) | |
| # sinphi2=0.9886119283 # $(python -c "from math import sin; print sin( $phi2 )" ) | |
| # echo "phi1: $((phi1 * 180.0 / pi))" | |
| # echo "sinphi1: ${sinphi1}" | |
| # echo "phi2: $((phi2 * 180.0 / pi))" | |
| # echo "sinphi2: ${sinphi2}" | |
| # psi1=0.1515733648 # $(( pi/2 - phi1 )) | |
| # tanpsi1=0.1527449055 # $(python -c "from math import tan; print tan( $psi1 )" ) | |
| # psi2=0.1510612608 # $(( pi/2 - phi2 )) | |
| # tanpsi2=0.1522208946 # $(python -c "from math import tan; print tan( $psi2 )" ) | |
| # echo "psi1: $((psi1 * 180.0 / pi))" | |
| # echo "tanpsi1: ${tanpsi1}, $((1 - tanpsi1))" | |
| # echo "psi2: $((psi2 * 180.0 / pi))" | |
| # echo "tanpsi2: ${tanpsi2}, $((1 - tanpsi2))" | |
| # r_x=1.0118181818 # $((1.0 + 2.0 * padding_x / width)) | |
| # echo "r_x: ${r_x}" | |
| # r_y=1.0159090909 # $((1.0 + 2.0 * padding_y / height)) | |
| # echo "r_y: ${r_y}" | |
| ulx=-5500111.4091 # $(( $(( -h * psi1 )) * ${r_x} )) | |
| uly=5503691.3124 # $(( $(( +h * psi2 )) * ${r_y} )) | |
| lrx=5500111.4091 # $(( $(( +h * psi1 )) * ${r_x} )) | |
| lry=-5503691.3124 # $(( $(( -h * psi2 )) * ${r_y} )) | |
| lon0=140.7 | |
| lon1=56.94504951 # $((lon0 - 1.03 * phi1 * 180.0 / pi)) | |
| lon2=224.45495049 # $((lon0 + 1.03 * phi1 * 180.0 / pi)) | |
| lat0=0 | |
| lat1=-83.785172129 # $((lat0 - 1.03 * phi2 * 180.0 / pi)) | |
| lat2=83.785172129 # $((lat0 + 1.03 * phi2 * 180.0 / pi)) | |
| gdal_translate -a_srs ${def} -a_ullr $ulx $uly $lrx $lry $1 $tempfile | |
| gdalwarp -t_srs '+proj=latlong +ellps=WGS84 +datum=WGS84' -r cubic -overwrite -tr 0.04 0.04 -te $lon1 $lat1 $lon2 $lat2 -order 3 $tempfile $2 |
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