#!/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 0.0 0.0 25.691356658936 56.979601821279 -gcp 10881.0 0.0 25.810832977295 56.98231451979 -gcp 10881.0 12132.0 25.817184448242 56.919497657732 -gcp 0.0 12132.0 25.696849822998 56.916311868896 LVVA_F7404_US1_GV1689_0002.jpg LVVA_F7404_US1_GV1689_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"882.0 906.0\n4851.0 1014.0\n4908.0 4185.0\n6643.5 4188.0\n6651.0 8149.5\n5233.5 8145.75\n5252.25 11049.0\n870.0 11031.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1689_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1689_0002.vrt LVVA_F7404_US1_GV1689_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1689_0002.cut.vrt LVVA_F7404_US1_GV1689_0002.xyz