#!/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 24.1328 56.89238333 -gcp 21600.0 0.0 24.08153333 56.89101667 -gcp 21600.0 21729.0 24.07931667 56.91966667 -gcp 0.0 21729.0 24.1315 56.92025 GX2200/GX_2200_SD_frame_73.jpg GX_2200_SD_frame_73.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0 3408.0533629794327\n912.0 19656.22679266259\n21216.0 19439.813229571984\n21192.0 3095.8532518065595" | \
  gdaltransform -tps -output_xy GX_2200_SD_frame_73.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2200_SD_frame_73.vrt GX_2200_SD_frame_73.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2200_SD_frame_73.cut.vrt GX_2200_SD_frame_73.xyz