#!/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 24.99085611 56.84672313 -gcp 21600.0 0.0 24.96124286 56.76199362 -gcp 21600.0 21849.0 24.7880656 56.77053961 -gcp 0.0 21849.0 24.81955822 56.87346205 GX2261/GX_2261_SK_frame_65.jpg GX_2261_SK_frame_65.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2088.0 2136.0\n1968.0 19320.0\n17376.0 19368.0\n17232.0 2112.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_65.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_65.vrt GX_2261_SK_frame_65.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_65.cut.vrt GX_2261_SK_frame_65.xyz