#!/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 27.43277356 57.40404448 -gcp 18063.0 0.0 27.43607979 57.30184553 -gcp 18063.0 18003.0 27.25233689 57.30014397 -gcp 0.0 18003.0 27.24634817 57.40064407 GX8473/GX_8473_SK_frame_238.jpg GX_8473_SK_frame_238.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2946.0 2424.0\n2898.0 3516.0\n2538.0 3534.0\n3180.0 15792.0\n16200.0 15384.0\n16032.0 2304.0" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_238.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_238.vrt GX_8473_SK_frame_238.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_238.cut.vrt GX_8473_SK_frame_238.xyz