#!/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 26.50644779 55.95932094 -gcp 14031.0 0.0 26.48733437 55.9167945 -gcp 14031.0 14040.0 26.41464114 55.92456176 -gcp 0.0 14040.0 26.42607534 55.96958964 GX3888/GX_3888A_SG_frame_76.jpg GX_3888A_SG_frame_76.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "408.0 1248.693718732629\n13728.0 1367.9332962757085\n13776.0 12600.053362979434\n360.0 12582.657031684268" | \
  gdaltransform -tps -output_xy GX_3888A_SG_frame_76.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_3888A_SG_frame_76.vrt GX_3888A_SG_frame_76.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_3888A_SG_frame_76.cut.vrt GX_3888A_SG_frame_76.xyz