#!/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 25.00735338 57.18675649 -gcp 16881.0 0.0 25.00454987 57.09732783 -gcp 16881.0 18498.0 24.82846445 57.09672667 -gcp 0.0 18498.0 24.82090005 57.18607327 GX10514/GX_10514_SK_frame_431.jpg GX_10514_SK_frame_431.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "504.0 2208.0\n696.0 15168.0\n16224.0 15120.0\n16128.0 2136.0" | \
  gdaltransform -tps -output_xy GX_10514_SK_frame_431.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10514_SK_frame_431.vrt GX_10514_SK_frame_431.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10514_SK_frame_431.cut.vrt GX_10514_SK_frame_431.xyz