#!/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 26.43417835 57.18264588 -gcp 43200.0 0.0 26.44743919 57.09868047 -gcp 43200.0 46188.0 26.28263276 57.08957939 -gcp 0.0 46188.0 26.26695871 57.17633069 GX10514/GX_10514_SK_frame_459.jpg GX_10514_SK_frame_459.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3312.0 5568.0\n2928.0 39888.0\n39312.0 40800.0\n39648.0 5472.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_459.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_459.vrt GX_10514_SK_frame_459.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_459.cut.vrt GX_10514_SK_frame_459.xyz