#!/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 25.0870973 57.20515021 -gcp 12009.0 0.0 25.0950298 57.18470649 -gcp 12009.0 12495.0 25.05910174 57.17989978 -gcp 0.0 12495.0 25.04815077 57.19918018 GX18586/GX_18586_SK_frame_42.jpg GX_18586_SK_frame_42.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1386.0 720.0\n1338.0 1506.0\n528.0 1512.0\n310.909423828125 9490.90869140625\n11659.63623046875 9199.63623046875\n11628.0 804.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_42.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_42.vrt GX_18586_SK_frame_42.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_42.cut.vrt GX_18586_SK_frame_42.xyz