#!/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 1110.0 22.337216666666666 57.5 -gcp 14208.0 1044.0 22.837216666666666 57.5 -gcp 14322.0 12255.0 22.837216666666666 57.25 -gcp 2133.0 12336.0 22.337216666666666 57.25 bruno/L12_1918.jpg L12_1918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2127.0 1110.0\n14208.0 1044.0\n14322.0 12255.0\n2133.0 12336.0" | \
  gdaltransform -tps -output_xy L12_1918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  L12_1918.vrt L12_1918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES L12_1918.cut.vrt L12_1918.xyz