#!/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 1635.0 1032.0 26.276666666666667 58 -gcp 13050.0 1059.0 26.726666666666667 58 -gcp 13071.0 12864.0 26.726666666666667 57.75 -gcp 1551.0 12879.0 26.276666666666667 57.75 bruno/0-21_1917.jpg 0-21_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1635.0 1032.0\n13050.0 1059.0\n13071.0 12864.0\n1551.0 12879.0" | \
  gdaltransform -tps -output_xy 0-21_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  0-21_1917.vrt 0-21_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 0-21_1917.cut.vrt 0-21_1917.xyz