#!/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 25.26046028 57.26098976 -gcp 20091.0 0.0 25.21395564 57.27513083 -gcp 20091.0 16377.0 25.235129 57.29614138 -gcp 0.0 16377.0 25.2822876 57.28143786 GX4190/c_GX_4190_SD_frame_70.jpg c_GX_4190_SD_frame_70.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 16374.0\n20088.0 16374.0\n20088.0 0.0" | \
  gdaltransform -tps -output_xy c_GX_4190_SD_frame_70.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  c_GX_4190_SD_frame_70.vrt c_GX_4190_SD_frame_70.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_70.cut.vrt c_GX_4190_SD_frame_70.xyz