#!/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 24.06408727169037 57.02404118382549 -gcp 21600.0 0.0 24.08962190151215 57.02621927845965 -gcp 21600.0 21852.0 24.094090461730957 57.01237189811796 -gcp 0.0 21852.0 24.068684577941898 57.009880457634694 GX4799/GX_4799_SD_frame_7.jpg GX_4799_SD_frame_7.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 3096.0\n984.0 19944.0\n21072.0 20016.0\n21168.0 3000.0" | \
  gdaltransform -tps -output_xy GX_4799_SD_frame_7.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4799_SD_frame_7.vrt GX_4799_SD_frame_7.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4799_SD_frame_7.cut.vrt GX_4799_SD_frame_7.xyz