#!/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 25.41059375 57.34934029 -gcp 27015.0 0.0 25.36430955 57.36407742 -gcp 27015.0 22176.0 25.38600326 57.38496201 -gcp 0.0 22176.0 25.43371439 57.37017252 GX4190/c_GX_4190_SD_frame_82.jpg c_GX_4190_SD_frame_82.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 22173.0\n27012.0 22173.0\n27012.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_82.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_82.vrt c_GX_4190_SD_frame_82.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES c_GX_4190_SD_frame_82.cut.vrt c_GX_4190_SD_frame_82.xyz