#!/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 22.61903732 57.78400911 -gcp 10875.0 0.0 22.62718419 57.75106333 -gcp 10875.0 10800.0 22.566787 57.74678206 -gcp 0.0 10800.0 22.55490497 57.77791692 GX18588/GX_18588_SK_frame_082.jpg GX_18588_SK_frame_082.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "744.0 1488.0267409470753\n10056.0 1320.294150417828\n10032.0 9288.04011142061\n888.0 9264.04011142061" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_082.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_082.vrt GX_18588_SK_frame_082.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_082.cut.vrt GX_18588_SK_frame_082.xyz