#!/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 25.31569588 57.35742095 -gcp 12009.0 0.0 25.35634224 57.33274572 -gcp 12009.0 12495.0 25.31016111 57.30988242 -gcp 0.0 12495.0 25.26857812 57.33341116 GX18586/GX_18586_SK_frame_11.jpg GX_18586_SK_frame_11.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1386.0 684.0\n1332.0 1500.0\n588.0 1548.0\n516.0 9168.0\n11652.0 9288.0\n11694.0 636.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_11.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_11.vrt GX_18586_SK_frame_11.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_11.cut.vrt GX_18586_SK_frame_11.xyz