#!/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 26.35143757 57.39689599 -gcp 10227.0 0.0 26.35332584 57.31113439 -gcp 10227.0 10179.0 26.19914174 57.30902498 -gcp 0.0 10179.0 26.19317651 57.39454873 GX8473/GX_8473_SK_frame_219.jpg GX_8473_SK_frame_219.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "540.0 1044.0066703724292\n9852.0 959.9399666481379\n9864.0 9131.946637020566\n396.0 9132.026681489717" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_219.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_219.vrt GX_8473_SK_frame_219.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_219.cut.vrt GX_8473_SK_frame_219.xyz