#!/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 24.99550581 57.04262122 -gcp 21600.0 0.0 25.00757337 57.12841256 -gcp 21600.0 23901.0 25.17777786 57.12315196 -gcp 0.0 23901.0 25.17329515 57.03661321 GX10525/GX_10525_SK_frame_522.jpg GX_10525_SK_frame_522.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "138.0 3468.0\n210.0 20622.0\n20724.0 20730.0\n20616.0 3312.0" | \
  gdaltransform -tps -output_xy GX_10525_SK_frame_522.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10525_SK_frame_522.vrt GX_10525_SK_frame_522.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10525_SK_frame_522.cut.vrt GX_10525_SK_frame_522.xyz