#!/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 23.22457362 57.26551394 -gcp 16734.0 0.0 23.15988779 57.25330741 -gcp 16734.0 16227.0 23.13858032 57.28535203 -gcp 0.0 16227.0 23.20112019 57.29949853 GX18588/GX_18588_SK_frame_44.jpg GX_18588_SK_frame_44.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2514.0 678.0\n15924.0 816.0\n15744.0 8106.0\n15708.0 14904.0\n2412.0 14688.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_44.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_44.vrt GX_18588_SK_frame_44.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_44.cut.vrt GX_18588_SK_frame_44.xyz