#!/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 25.053325452131 56.939662440908 -gcp 10920.0 0.0 25.15787226324 56.95139782183 -gcp 10920.0 16059.0 25.187322775284 56.86584483988 -gcp 0.0 16059.0 25.082775964174 56.854109458958 LVVA_F7404_US1_GV784_0002.jpg LVVA_F7404_US1_GV784_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"7008.0 12033.0\n5364.0 10980.0\n4656.0 10374.0\n2772.0 8478.0\n1905.0 8574.0\n759.0 8592.0\n774.0 7302.0\n717.0 522.0\n10278.0 606.0\n10338.0 14904.0\n7032.0 14928.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV784_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV784_0002.vrt LVVA_F7404_US1_GV784_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV784_0002.cut.vrt LVVA_F7404_US1_GV784_0002.xyz