#!/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 2337.0 2883.0 24.337216666666666 57.25 -gcp 23610.0 3123.0 24.837216666666666 57.25 -gcp 23493.0 22710.0 24.837216666666666 57 -gcp 2118.0 22506.0 24.337216666666666 57 ferro/P13_Wangasch_1921_LoC_G6520_s100_.P6.jpg P13_Wangasch_1921_LoC_G6520_s100_.P6.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2337.0 2883.0\n23610.0 3123.0\n23493.0 22710.0\n2118.0 22506.0" | \
  gdaltransform -tps -output_xy P13_Wangasch_1921_LoC_G6520_s100_.P6.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  P13_Wangasch_1921_LoC_G6520_s100_.P6.vrt P13_Wangasch_1921_LoC_G6520_s100_.P6.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES P13_Wangasch_1921_LoC_G6520_s100_.P6.cut.vrt P13_Wangasch_1921_LoC_G6520_s100_.P6.xyz