#!/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 24.84329999 56.75566049 -gcp 21540.0 0.0 24.87919928 56.73377748 -gcp 21540.0 21729.0 24.84310355 56.71428994 -gcp 0.0 21729.0 24.80263929 56.73456934 GX4477/GX_4477R_SD_frame_529.jpg GX_4477R_SD_frame_529.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "480.0 2904.0\n744.0 19464.0\n20952.0 19920.0\n21084.0 3012.0" | \
  gdaltransform -tps -output_xy GX_4477R_SD_frame_529.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4477R_SD_frame_529.vrt GX_4477R_SD_frame_529.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4477R_SD_frame_529.cut.vrt GX_4477R_SD_frame_529.xyz