#!/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 1030.057446114983 1275.150686357438 26.28571272 57.39092356 -gcp 9623.021453001249 1218.1112358781731 26.28466129 57.31775114 -gcp 9131.871666099887 9206.549930859435 26.16413891 57.32165275 -gcp 345.73769881117653 9609.979162974567 26.1545527 57.39596485 GX8473/GX_8473_SK_frame_218_copy.jpg GX_8473_SK_frame_218_copy.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "756.0 1680.0\n9684.0 1391.9866295264624\n9888.0 9587.986629526462\n936.0 9756.193871866295" | \
  gdaltransform -tps -output_xy GX_8473_SK_frame_218_copy.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8473_SK_frame_218_copy.vrt GX_8473_SK_frame_218_copy.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8473_SK_frame_218_copy.cut.vrt GX_8473_SK_frame_218_copy.xyz