#!/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 24.587488174438 57.482248954667 -gcp 10161.0 0.0 24.581394195557 57.437743659319 -gcp 10161.0 20496.0 24.388753950661 57.445366484375 -gcp 0.0 20496.0 24.392995233281 57.491294457442 LVVA_F7404_US1_GV1875_0003.jpg LVVA_F7404_US1_GV1875_0003.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"946.5 612.0\n6190.5 663.0\n6318.0 617.25\n6346.5 662.25\n7728.0 675.0\n7701.0 2850.0\n7878.0 3351.0\n957.0 3252.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV1875_0003.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV1875_0003.vrt LVVA_F7404_US1_GV1875_0003.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV1875_0003.cut.vrt LVVA_F7404_US1_GV1875_0003.xyz