#!/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 25.36201358 57.28898766 -gcp 14076.0 0.0 25.36933064 57.20728296 -gcp 14076.0 14124.0 25.21868706 57.20136436 -gcp 0.0 14124.0 25.20752576 57.28326163 GX10508/GX_10508_SK_frame_310.jpg GX_10508_SK_frame_310.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "432.0 1248.0\n13848.0 936.0\n13776.0 12732.0\n456.0 12540.0" | \
  gdaltransform -tps -output_xy GX_10508_SK_frame_310.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_10508_SK_frame_310.vrt GX_10508_SK_frame_310.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_10508_SK_frame_310.cut.vrt GX_10508_SK_frame_310.xyz