#!/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 25.31312227 57.26024775 -gcp 27204.0 0.0 25.33015966 57.23963181 -gcp 27204.0 21186.0 25.30024767 57.23204884 -gcp 0.0 21186.0 25.2829957 57.252965 GX4190/c_GX_4190_SD_frame_131.jpg c_GX_4190_SD_frame_131.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 21183.0\n27201.0 21183.0\n27201.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_131.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_131.vrt c_GX_4190_SD_frame_131.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_131.cut.vrt c_GX_4190_SD_frame_131.xyz