#!/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 25.95239647 57.1508113 -gcp 21537.0 0.0 25.95530711 57.23458981 -gcp 21537.0 23466.0 26.12488405 57.23383138 -gcp 0.0 23466.0 26.12327345 57.14943614 GX10802/GX_10802_SK_frame_382.jpg GX_10802_SK_frame_382.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "984.0 2760.0\n936.0 19440.0\n20808.0 19608.0\n20880.0 2688.0" | \
  gdaltransform -tps -output_xy GX_10802_SK_frame_382.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10802_SK_frame_382.vrt GX_10802_SK_frame_382.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10802_SK_frame_382.cut.vrt GX_10802_SK_frame_382.xyz