#!/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 24.27673502 56.7961884 -gcp 15582.0 0.0 24.29132507 56.71429254 -gcp 15582.0 15582.0 24.14193812 56.70425591 -gcp 0.0 15582.0 24.12224088 56.78691679 GX10863/GX_10863_SK_frame_873.jpg GX_10863_SK_frame_873.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "408.0 1416.0\n432.0 13488.0\n14568.0 13584.0\n14688.0 1272.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_873.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_873.vrt GX_10863_SK_frame_873.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_873.cut.vrt GX_10863_SK_frame_873.xyz