#!/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 22.9014945 56.67077202 -gcp 11214.0 0.0 23.06500196 56.69670584 -gcp 11214.0 10866.0 23.13566551 56.60971075 -gcp 0.0 10866.0 22.9458046 56.56293542 GX2685/GX_2685A_SK_frame_97.jpg GX_2685A_SK_frame_97.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "480.0 363.0\n10752.0 311.8128133704738\n10824.0 9456.026740947076\n576.0 9648.093593314763" | \
  gdaltransform -tps -output_xy GX_2685A_SK_frame_97.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2685A_SK_frame_97.vrt GX_2685A_SK_frame_97.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2685A_SK_frame_97.cut.vrt GX_2685A_SK_frame_97.xyz