#!/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 25.125732421875 57.475604302671 -gcp 12993.0 0.0 25.289497375488 57.497840682193 -gcp 12993.0 6498.0 25.306835174561 57.453077326077 -gcp 0.0 6498.0 25.145301818848 57.429797183588 LVVA_F7404_US1_GV233_0002.jpg LVVA_F7404_US1_GV233_0002.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"666.0 777.0\n8905.5 816.75\n9090.75 722.25\n9276.0 725.25\n9492.0 755.25\n9630.75 827.25\n10065.0 825.0\n12531.0 819.0\n12546.0 5649.0\n588.0 5628.0\" | \
  gdaltransform -tps -output_xy LVVA_F7404_US1_GV233_0002.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  LVVA_F7404_US1_GV233_0002.vrt LVVA_F7404_US1_GV233_0002.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LVVA_F7404_US1_GV233_0002.cut.vrt LVVA_F7404_US1_GV233_0002.xyz