#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 3592.5000000106857 5568.22762629022 22.5 57.5 -gcp 39076.500000000386 5704.717620809875 23.33556175231934 57.49961621502646 -gcp 41384.99999999852 39405.647026039944 23.391652107238773 57.07225926194373 -gcp 6015.0 41712.667037242914 22.56497383117676 57.041430239209845 mapster/Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.jpg Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3417.0 23886.046692607004\n3592.5000000106857 5568.22762629022\n41541.0 5708.961645358533\n41484.0 26797.627570872704\n41652.0 33167.306281267374\n41676.0 36215.23290717065\n41400.0 42027.14841578655\n23754.0 42042.09672040022\n3198.0 42033.065036131185" | \
  gdaltransform -tps -output_xy Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.vrt Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.cut.vrt Estland-Lettland_100K_32_SW_Talsi_(Talsen)_IX.1940_incomplete.xyz