#!/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 26.04624319 57.0386698 -gcp 21600.0 0.0 26.05184251 57.12329268 -gcp 21600.0 23091.0 26.21642623 57.12207333 -gcp 0.0 23091.0 26.21515775 57.03630688 GX10525/GX_10525_SK_frame_505.jpg GX_10525_SK_frame_505.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1200.0 3480.0\n1344.0 20352.0\n20472.0 20568.0\n20784.0 3288.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_505.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_505.vrt GX_10525_SK_frame_505.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_505.cut.vrt GX_10525_SK_frame_505.xyz