#!/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 756.0 756.0 24.337216666666666 57.25 -gcp 11565.0 927.0 24.837216666666666 57.25 -gcp 11457.0 10908.0 24.837216666666666 57 -gcp 579.0 10743.0 24.337216666666666 57 bruno/P13_Wangasch 1917.jpg P13_Wangasch 1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "756.0 756.0\n11565.0 927.0\n11457.0 10908.0\n579.0 10743.0" | \
  gdaltransform -tps -output_xy P13_Wangasch 1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  P13_Wangasch 1917.vrt P13_Wangasch 1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES P13_Wangasch 1917.cut.vrt P13_Wangasch 1917.xyz