#!/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 24.94628191 57.04242225 -gcp 14160.0 0.0 24.95235443 57.12704536 -gcp 14160.0 14169.0 25.10789037 57.12449993 -gcp 0.0 14169.0 25.10227919 57.03883867 GX10525/GX_10525_SK_frame_523.jpg GX_10525_SK_frame_523.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "900.0 1212.0\n13944.0 792.0\n13956.0 12828.0\n1080.0 12624.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_523.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_523.vrt GX_10525_SK_frame_523.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_523.cut.vrt GX_10525_SK_frame_523.xyz