#!/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 25.24726994 57.32307839 -gcp 12009.0 0.0 25.28551283 57.32863431 -gcp 12009.0 12495.0 25.29482378 57.30791256 -gcp 0.0 12495.0 25.2587306 57.3025255 GX18586/GX_18586_SK_frame_22.jpg GX_18586_SK_frame_22.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "10626.0 1938.0\n10614.0 1020.0\n2850.0 954.0\n2796.0 12372.0\n11460.0 12369.0\n11538.0 1956.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_22.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_22.vrt GX_18586_SK_frame_22.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_22.cut.vrt GX_18586_SK_frame_22.xyz