#!/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 24.11121608 57.03995831 -gcp 21600.0 0.0 24.07023765 57.02126173 -gcp 21600.0 21729.0 24.0356662 57.04223125 -gcp 0.0 21729.0 24.07532855 57.06295863 GX2200/GX_2200_SD_frame_85.jpg GX_2200_SD_frame_85.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "768.0 3239.9332962757085\n1008.0 19536.026681489715\n21168.0 19272.01334074486\n21072.0 3335.9866592551416" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_85.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_85.vrt GX_2200_SD_frame_85.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_85.cut.vrt GX_2200_SD_frame_85.xyz