#!/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 26.7767146 56.77435536 -gcp 22656.0 0.0 26.78141383 56.86110166 -gcp 22656.0 21381.0 26.93473594 56.85865706 -gcp 0.0 21381.0 26.92877027 56.77057027 GX10673/GX_10673_SK_frame_957.jpg GX_10673_SK_frame_957.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1272.0 19008.0\n1176.0 2124.0\n21168.0 2112.0\n21360.0 19224.0" | \
  gdaltransform -tps -output_xy GX_10673_SK_frame_957.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10673_SK_frame_957.vrt GX_10673_SK_frame_957.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10673_SK_frame_957.cut.vrt GX_10673_SK_frame_957.xyz