#!/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 2346.0 2217.0 25.837216666666666 56.25 -gcp 24360.0 2172.0 26.337216666666666 56.25 -gcp 24555.0 21918.0 26.337216666666666 56 -gcp 2394.0 21999.0 25.837216666666666 56 nr/KdwR-LC_S17_Szubbat_1914_.jpg KdwR-LC_S17_Szubbat_1914_.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2346.0 2217.0\n24360.0 2172.0\n24555.0 21918.0\n2394.0 21999.0" | \
  gdaltransform -tps -output_xy KdwR-LC_S17_Szubbat_1914_.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_S17_Szubbat_1914_.vrt KdwR-LC_S17_Szubbat_1914_.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_S17_Szubbat_1914_.cut.vrt KdwR-LC_S17_Szubbat_1914_.xyz