#!/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 24.83908974 56.79559136 -gcp 15582.0 0.0 24.84572739 56.71240204 -gcp 15582.0 15582.0 24.69477598 56.70684133 -gcp 0.0 15582.0 24.68219744 56.79059572 GX10863/GX_10863_SK_frame_884.jpg GX_10863_SK_frame_884.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "912.0 1416.0\n936.0 13800.0\n14880.0 13704.0\n14976.0 1152.0" | \
  gdaltransform -tps -output_xy GX_10863_SK_frame_884.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10863_SK_frame_884.vrt GX_10863_SK_frame_884.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10863_SK_frame_884.cut.vrt GX_10863_SK_frame_884.xyz