#!/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 22.16070407 57.67086055 -gcp 17754.0 0.0 22.19231399 57.63694722 -gcp 17754.0 17817.0 22.12964909 57.61854486 -gcp 0.0 17817.0 22.09498256 57.65287982 GX18588/GX_18588_SK_frame_97.jpg GX_18588_SK_frame_97.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3336.0 1944.0\n3528.0 12816.0\n16368.0 12744.0\n16320.0 1848.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_97.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_97.vrt GX_18588_SK_frame_97.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_97.cut.vrt GX_18588_SK_frame_97.xyz