#!/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 27.31012164 57.25352319 -gcp 21600.0 0.0 27.33927572 57.33448388 -gcp 21600.0 23403.0 27.50274789 57.32149546 -gcp 0.0 23403.0 27.48224488 57.23668317 GX8464/GX_8464_SK_frame_241.jpg GX_8464_SK_frame_241.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "888.0204255319145 3000.0\n839.9727659574464 19896.0\n21264.36085106383 19584.0\n21288.136170212765 2136.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_241.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_241.vrt GX_8464_SK_frame_241.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_241.cut.vrt GX_8464_SK_frame_241.xyz