#!/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 26.894359588623 57.432384597694 -gcp 7680.0 0.0 27.002592086792 57.439314270032 -gcp 7680.0 14397.0 27.02911376953125 57.32503845095438 -gcp 0.0 14397.0 26.915645599365 57.319106755567 LVVA_F7404_US1_GV436_0002.jpg LVVA_F7404_US1_GV436_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"561.0 8310.0\n459.0 8136.0\n561.0 7911.0\n588.0 4686.0\n588.0 21.0\n6873.0 3.0\n6843.0 6231.0\n7161.0 6426.0\n7167.75 8404.5\n6853.5 8104.5\n6865.5 9328.5\n3783.0 9291.0\n3723.0 9420.0\n571.5 9384.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV436_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV436_0002.vrt LVVA_F7404_US1_GV436_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV436_0002.cut.vrt LVVA_F7404_US1_GV436_0002.xyz