#!/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 26.13255263 56.77264064 -gcp 21600.0 0.0 26.13359037 56.85660832 -gcp 21600.0 23775.0 26.30347234 56.85556242 -gcp 0.0 23775.0 26.3019668 56.77187697 GX10673/GX_10673_SK_frame_967.jpg GX_10673_SK_frame_967.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "744.0 3576.0\n648.0 20640.0\n20256.0 21096.0\n20280.0 3576.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_967.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_967.vrt GX_10673_SK_frame_967.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_967.cut.vrt GX_10673_SK_frame_967.xyz