#!/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 25.863361358643 57.235846326191 -gcp 10329.0 0.0 25.964770317078 57.247178394756 -gcp 10329.0 8655.0 25.982322692871 57.202503356853 -gcp 0.0 8655.0 25.878510475159 57.192622477236 LVVA_F7404_US1_GV1009_0002.jpg LVVA_F7404_US1_GV1009_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"234.0 447.0\n9897.0 474.0\n9876.0 7731.0\n264.0 7701.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1009_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1009_0002.vrt LVVA_F7404_US1_GV1009_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1009_0002.cut.vrt LVVA_F7404_US1_GV1009_0002.xyz