#!/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 24.10722418 57.02505519 -gcp 21600.0 0.0 24.06397499 57.00890797 -gcp 21600.0 21729.0 24.03277542 57.0323479 -gcp 0.0 21729.0 24.07643829 57.04926058 GX2200/GX_2200_SD_frame_84.jpg GX_2200_SD_frame_84.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 3024.1067259588654\n912.0 19247.973318510285\n21216.0 19487.679822123406\n20976.0 3095.9332962757085" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_84.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_84.vrt GX_2200_SD_frame_84.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_84.cut.vrt GX_2200_SD_frame_84.xyz