#!/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 23.14426661 57.27150271 -gcp 16800.0 0.0 23.21065575 57.28263883 -gcp 16800.0 16227.0 23.22806557 57.24775327 -gcp 0.0 16227.0 23.16351414 57.23779718 GX18588/GX_18588_SK_frame_43.jpg GX_18588_SK_frame_43.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 8064.0\n1104.0 1050.0\n14352.0 1152.0\n14292.0 15168.0\n912.0 15168.0" | \
  gdaltransform -tps -output_xy GX_18588_SK_frame_43.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_18588_SK_frame_43.vrt GX_18588_SK_frame_43.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_18588_SK_frame_43.cut.vrt GX_18588_SK_frame_43.xyz