#!/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 26.1469718 57.18688118 -gcp 43200.0 0.0 26.15926157 57.10283924 -gcp 43200.0 46188.0 25.99642719 57.09378835 -gcp 0.0 46188.0 25.97827273 57.179925 GX10514/GX_10514_SK_frame_454.jpg GX_10514_SK_frame_454.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4464.0 4848.0\n4224.0 38880.0\n39840.0 39984.0\n40272.0 5088.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_454.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_454.vrt GX_10514_SK_frame_454.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_454.cut.vrt GX_10514_SK_frame_454.xyz