#!/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 25.61898903 57.07890843 -gcp 11388.0 0.0 25.62334755 56.98889296 -gcp 11388.0 10980.0 25.4632453 56.98550479 -gcp 0.0 10980.0 25.45562521 57.07583057 GX220/GX_220_SK_frame_580.jpg GX_220_SK_frame_580.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "648.0 1175.9866295264624\n10896.0 1032.2674094707527\n10824.0 9551.95988857939\n600.0 9624.280779944289" | \
  gdaltransform -tps -output_xy GX_220_SK_frame_580.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_220_SK_frame_580.vrt GX_220_SK_frame_580.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_220_SK_frame_580.cut.vrt GX_220_SK_frame_580.xyz