#!/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 26.56659901 55.93785924 -gcp 13860.0 0.0 26.51211262 55.90733434 -gcp 13860.0 14298.0 26.45542949 55.93500481 -gcp 0.0 14298.0 26.50597556 55.97121363 GX3888/GX_3888A_SG_frame_74.jpg GX_3888A_SG_frame_74.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "264.0 1801.0005558643688\n13728.0 1680.933852140078\n13728.0 13038.910505836577\n240.0 12918.843802112284" | \
  gdaltransform -tps -output_xy GX_3888A_SG_frame_74.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_3888A_SG_frame_74.vrt GX_3888A_SG_frame_74.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_3888A_SG_frame_74.cut.vrt GX_3888A_SG_frame_74.xyz