#!/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 24.1102159 56.95190228 -gcp 21381.0 0.0 24.16337729 56.9527565 -gcp 21381.0 20811.0 24.16458237 56.92311543 -gcp 0.0 20811.0 24.10987258 56.92440465 GX4199/GX_4199_SD_frame_145.jpg GX_4199_SD_frame_145.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "18060.0 2160.0\n18084.0 456.0\n2184.0 504.0\n2136.0 2148.0\n612.0 2280.0\n768.0 18960.0\n20832.0 19200.0\n20844.0 2208.0" | \
  gdaltransform -tps -output_xy GX_4199_SD_frame_145.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_4199_SD_frame_145.vrt GX_4199_SD_frame_145.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_4199_SD_frame_145.cut.vrt GX_4199_SD_frame_145.xyz