#!/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 23.67153378 56.70034447 -gcp 21600.0 0.0 23.62508575 56.66779473 -gcp 21600.0 21849.0 23.57571682 56.70594825 -gcp 0.0 21849.0 23.63847228 56.72289071 GX2525/GX_2525_SK_frame_1.jpg GX_2525_SK_frame_1.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "21588.0 3264.0\n17736.0 3192.0\n17712.0 1056.0\n2784.0 1176.0\n2736.0 2880.0\n936.0 2904.0\n1128.0 19368.0\n21480.0 19368.0" | \
  gdaltransform -tps -output_xy GX_2525_SK_frame_1.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2525_SK_frame_1.vrt GX_2525_SK_frame_1.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2525_SK_frame_1.cut.vrt GX_2525_SK_frame_1.xyz