#!/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 26.10863652 57.25904062 -gcp 21600.0 0.0 26.11255014 57.34345178 -gcp 21600.0 23403.0 26.2830151 57.34114709 -gcp 0.0 23403.0 26.27977045 57.25696278 GX8464/GX_8464_SK_frame_262.jpg GX_8464_SK_frame_262.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "300.0 2424.0\n294.0 9684.0\n3414.0 9978.0\n6384.0 18240.0\n21024.0 18336.0\n20880.0 2136.0" | \
  gdaltransform -tps -output_xy GX_8464_SK_frame_262.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_8464_SK_frame_262.vrt GX_8464_SK_frame_262.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_8464_SK_frame_262.cut.vrt GX_8464_SK_frame_262.xyz