#!/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 25.572910308838 56.929990097913 -gcp 10584.0 0.0 25.660800933838 56.935422523557 -gcp 10584.0 18876.0 25.680327415466 56.844418879788 -gcp 0.0 18876.0 25.589218139648 56.83817506837 LVVA_F7404_US1_GV882_0002.jpg LVVA_F7404_US1_GV882_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"429.0 753.0\n9951.0 687.0\n9816.0 18294.0\n522.0 18183.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV882_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV882_0002.vrt LVVA_F7404_US1_GV882_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV882_0002.cut.vrt LVVA_F7404_US1_GV882_0002.xyz