#!/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 24.26617807 57.18324884 -gcp 21600.0 0.0 24.24783688 57.09927829 -gcp 21600.0 23280.0 24.07588216 57.10752047 -gcp 0.0 23280.0 24.0934105 57.19361763 GX10514/GX_10514_SK_frame_417.jpg GX_10514_SK_frame_417.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "648.0 2520.0\n600.0 19512.0\n21144.0 19944.0\n21240.0 2496.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_417.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_417.vrt GX_10514_SK_frame_417.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_417.cut.vrt GX_10514_SK_frame_417.xyz