#!/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 24.47513383 57.08509859 -gcp 14076.0 0.0 24.63989746 57.09519623 -gcp 14076.0 14169.0 24.66177299 56.99662836 -gcp 0.0 14169.0 24.48069616 56.99352874 GX2206/GX_2206_SK_frame_75.jpg GX_2206_SK_frame_75.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1488.0 504.02674094707527\n12720.0 431.82618384401144\n12408.0 13775.893036211699\n1008.0 13800.026740947076" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_75.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_75.vrt GX_2206_SK_frame_75.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_75.cut.vrt GX_2206_SK_frame_75.xyz