#!/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 24.01477781 56.98442816 -gcp 21414.0 0.0 24.06022225 57.08109852 -gcp 21414.0 21975.0 24.23170969 57.05381847 -gcp 0.0 21975.0 24.19158819 56.9640009 GX2206/GX_2206_SK_frame_55.jpg GX_2206_SK_frame_55.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "435.0 2865.0\n483.0 10377.0\n837.0 10623.0\n861.0 12045.0\n522.0 12291.0\n576.0 19608.0\n21411.0 19902.0\n21396.0 2910.0" | \
  gdaltransform -tps -output_xy GX_2206_SK_frame_55.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2206_SK_frame_55.vrt GX_2206_SK_frame_55.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2206_SK_frame_55.cut.vrt GX_2206_SK_frame_55.xyz