#!/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 25.04982458 57.19988094 -gcp 12009.0 0.0 25.05863428 57.17959897 -gcp 12009.0 12495.0 25.0203687 57.17538052 -gcp 0.0 12495.0 25.0123881 57.19465172 GX18586/GX_18586_SK_frame_46.jpg GX_18586_SK_frame_46.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "774.0 1404.0\n816.0 2214.0\n0.0 2268.0\n0.0 11664.0\n642.0 11790.0\n1002.0 12198.0\n10752.0 12138.0\n10782.0 1398.0" | \
  gdaltransform -tps -output_xy GX_18586_SK_frame_46.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18586_SK_frame_46.vrt GX_18586_SK_frame_46.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18586_SK_frame_46.cut.vrt GX_18586_SK_frame_46.xyz