#!/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 4860.0 2619.0 21.837216666666666 57.5 -gcp 26046.0 2613.0 22.337216666666666 57.5 -gcp 26244.0 22236.0 22.337216666666666 57.25 -gcp 4887.0 22320.0 21.837216666666666 57.25 nr/KdwR-LC_K12_Ugahlen_1918-.jpg KdwR-LC_K12_Ugahlen_1918-.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "4860.0 2619.0\n26046.0 2613.0\n26244.0 22236.0\n4887.0 22320.0" | \
  gdaltransform -tps -output_xy KdwR-LC_K12_Ugahlen_1918-.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  KdwR-LC_K12_Ugahlen_1918-.vrt KdwR-LC_K12_Ugahlen_1918-.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES KdwR-LC_K12_Ugahlen_1918-.cut.vrt KdwR-LC_K12_Ugahlen_1918-.xyz