#!/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 27.09023497 57.14073822 -gcp 21537.0 0.0 27.10534902 57.22479892 -gcp 21537.0 23466.0 27.27139202 57.21832233 -gcp 0.0 23466.0 27.26252451 57.13243593 GX10802/GX_10802_SK_frame_361.jpg GX_10802_SK_frame_361.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1152.0 2424.0\n1080.0 19344.0\n20640.0 19584.0\n20880.0 2256.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_361.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_361.vrt GX_10802_SK_frame_361.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_361.cut.vrt GX_10802_SK_frame_361.xyz