#!/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 25.425539016724 57.133863895173 -gcp 13725.0 0.0 25.55703163147 57.143085276678 -gcp 13725.0 8676.0 25.570335388184 57.098214239337 -gcp 0.0 8676.0 25.438499450684 57.088422056807 LVVA_F7404_US1_GV870_0002.jpg LVVA_F7404_US1_GV870_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"612.0 3297.0\n3747.0 3303.0\n3672.0 540.0\n13236.0 486.0\n13218.0 7485.0\n4290.0 7458.0\n3462.0 7368.0\n3210.0 7176.0\n2508.0 7050.0\n2028.0 6996.0\n1692.0 6708.0\n1434.0 6234.0\n636.0 5922.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV870_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV870_0002.vrt LVVA_F7404_US1_GV870_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV870_0002.cut.vrt LVVA_F7404_US1_GV870_0002.xyz