#!/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 25.3032558 57.34998047 -gcp 12009.0 0.0 25.34580311 57.32650078 -gcp 12009.0 12495.0 25.29891535 57.30242812 -gcp 0.0 12495.0 25.25806264 57.32635757 GX18586/GX_18586_SK_frame_12.jpg GX_18586_SK_frame_12.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1050.0 714.0\n1032.0 1536.0\n282.0 1560.0\n252.0 9294.0\n11508.0 9162.0\n11436.0 636.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_12.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_12.vrt GX_18586_SK_frame_12.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_12.cut.vrt GX_18586_SK_frame_12.xyz