#!/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 25.71645141 56.69757262 -gcp 14976.0 0.0 25.72062492 56.60942659 -gcp 14976.0 14211.0 25.56843638 56.60567113 -gcp 0.0 14211.0 25.56057562 56.69538194 GX10511/GX_10511_SK_frame_52.jpg GX_10511_SK_frame_52.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1368.0 1272.0\n14760.0 840.0\n14772.0 12624.0\n1224.0 12600.0" | \
  gdaltransform -tps -output_xy GX_10511_SK_frame_52.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10511_SK_frame_52.vrt GX_10511_SK_frame_52.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10511_SK_frame_52.cut.vrt GX_10511_SK_frame_52.xyz