#!/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 23.79421949 56.75582896 -gcp 22785.0 0.0 23.78866196 56.84626124 -gcp 22785.0 21252.0 23.94244909 56.85055618 -gcp 0.0 21252.0 23.95139694 56.75926328 GX10673/GX_10673_SK_frame_11.jpg GX_10673_SK_frame_11.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1176.0 2496.0\n20784.0 2400.0\n20640.0 19344.0\n1152.0 19032.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_11.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_11.vrt GX_10673_SK_frame_11.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_11.cut.vrt GX_10673_SK_frame_11.xyz