#!/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 2127.0 732.0 25.337216666666666 57 -gcp 15120.0 738.0 25.837216666666666 57 -gcp 15150.0 12645.0 25.837216666666666 56.75 -gcp 2067.0 12627.0 25.337216666666666 56.75 bruno/R14_1918.jpg R14_1918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2127.0 732.0\n15120.0 738.0\n15150.0 12645.0\n2067.0 12627.0" | \
  gdaltransform -tps -output_xy R14_1918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  R14_1918.vrt R14_1918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES R14_1918.cut.vrt R14_1918.xyz