#!/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 26.58913493 55.89602211 -gcp 13689.0 0.0 26.51626468 55.88561367 -gcp 13689.0 14169.0 26.49338007 55.92561371 -gcp 0.0 14169.0 26.56723738 55.94059022 GX3888/GX_3888A_SG_frame_72.jpg GX_3888A_SG_frame_72.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "384.0 1608.8938299055035\n13488.0 1680.933852140078\n13464.0 12918.843802112284\n288.0 12918.843802112284" | \
  gdaltransform -tps -output_xy GX_3888A_SG_frame_72.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_3888A_SG_frame_72.vrt GX_3888A_SG_frame_72.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_3888A_SG_frame_72.cut.vrt GX_3888A_SG_frame_72.xyz