#!/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 26.74731016 57.39617884 -gcp 10770.0 0.0 26.7545414 57.30562944 -gcp 10770.0 10776.0 26.59013271 57.30156095 -gcp 0.0 10776.0 26.580863 57.39121842 GX8473/GX_8473_SK_frame_226_copy.jpg GX_8473_SK_frame_226_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "816.0 1368.0\n10164.0 923.8128133704735\n10140.0 9336.073537604456\n1128.0 9456.026740947076" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_226_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_226_copy.vrt GX_8473_SK_frame_226_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_226_copy.cut.vrt GX_8473_SK_frame_226_copy.xyz