#!/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 24.14000873 57.0070257 -gcp 21600.0 0.0 24.09366682 56.99439291 -gcp 21600.0 21729.0 24.06900288 57.01875242 -gcp 0.0 21729.0 24.1158161 57.03383067 GX2200/GX_2200_SD_frame_82.jpg GX_2200_SD_frame_82.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 2928.3468593663147\n960.0 19296.21345191773\n21024.0 19104.02668148972\n21264.0 3023.9733185102837" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_82.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_82.vrt GX_2200_SD_frame_82.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_82.cut.vrt GX_2200_SD_frame_82.xyz