#!/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 25.27546406 57.12996275 -gcp 11250.0 0.0 25.43768406 57.12948526 -gcp 11250.0 11250.0 25.43506622 57.0400294 -gcp 0.0 11250.0 25.27241707 57.0419906 GX10525/GX_10525_SK_frame_517.jpg GX_10525_SK_frame_517.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1176.0 648.0\n9816.0 612.0\n9828.0 10374.0\n1296.0 10344.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_517.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_517.vrt GX_10525_SK_frame_517.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_517.cut.vrt GX_10525_SK_frame_517.xyz