#!/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 26.419286727905 57.287996029577 -gcp 14952.0 0.0 26.558246612549 57.296900743354 -gcp 14952.0 10272.0 26.567945480347 57.238935124615 -gcp 0.0 10272.0 26.430788040161 57.227832823323 LVVA_F7404_US1_GV1625_0002.jpg LVVA_F7404_US1_GV1625_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"495.0 2262.0\n2994.0 2274.0\n2992.5 2059.5\n3024.0 2044.5\n3033.0 717.0\n7380.0 741.0\n7372.5 2286.0\n10077.0 2313.0\n10086.0 4215.0\n9698.25 4206.75\n9729.0 9393.0\n4674.0 9330.0\n4516.5 9514.5\n3859.5 9520.5\n3657.0 9327.0\n522.0 9303.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1625_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1625_0002.vrt LVVA_F7404_US1_GV1625_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1625_0002.cut.vrt LVVA_F7404_US1_GV1625_0002.xyz