#!/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 22.37603741 57.72625052 -gcp 17754.0 0.0 22.40019287 57.69077941 -gcp 17754.0 17817.0 22.33224512 57.67675857 -gcp 0.0 17817.0 22.30546761 57.71421994 GX18588/GX_18588_SK_frame_90.jpg GX_18588_SK_frame_90.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3696.0 1920.0\n3744.0 12456.0\n16296.0 12432.0\n16224.0 1872.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_90.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_90.vrt GX_18588_SK_frame_90.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_90.cut.vrt GX_18588_SK_frame_90.xyz