#!/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 25.306288 57.28973537 -gcp 14376.0 0.0 25.31174898 57.20605983 -gcp 14376.0 14211.0 25.15939951 57.20249173 -gcp 0.0 14211.0 25.15059114 57.28611727 GX10508/GX_10508_SK_frame_309.jpg GX_10508_SK_frame_309.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "780.0 1344.0\n14232.0 1008.0\n14100.0 12864.0\n588.0 12624.0" | \
  gdaltransform -tps -output_xy GX_10508_SK_frame_309.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10508_SK_frame_309.vrt GX_10508_SK_frame_309.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10508_SK_frame_309.cut.vrt GX_10508_SK_frame_309.xyz