#!/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 24.89520729 57.15710215 -gcp 27165.0 0.0 24.93647575 57.14951676 -gcp 27165.0 21987.0 24.92657304 57.1319716 -gcp 0.0 21987.0 24.88337874 57.13817797 GX4190/c_GX_4190_SD_frame_138.jpg c_GX_4190_SD_frame_138.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 21984.0\n27162.0 21984.0\n27162.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_138.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_138.vrt c_GX_4190_SD_frame_138.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_138.cut.vrt c_GX_4190_SD_frame_138.xyz