#!/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 24.81462966 57.04832426 -gcp 21414.0 0.0 24.82033603 57.14883306 -gcp 21414.0 21789.0 24.99870862 57.13909096 -gcp 0.0 21789.0 24.99181898 57.05007452 GX2206/GX_2206_SK_frame_87.jpg GX_2206_SK_frame_87.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 3192.0\n792.0 19488.0\n21288.0 19392.0\n21048.0 3072.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_87.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_87.vrt GX_2206_SK_frame_87.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_87.cut.vrt GX_2206_SK_frame_87.xyz