#!/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 1470.0 792.0 26.337216666666666 56.5 -gcp 14547.0 888.0 26.837216666666666 56.5 -gcp 14505.0 12588.0 26.837216666666666 56.25 -gcp 1335.0 12489.0 26.337216666666666 56.25 bruno/T16_1917.jpg T16_1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1470.0 792.0\n14547.0 888.0\n14505.0 12588.0\n1335.0 12489.0" | \
  gdaltransform -tps -output_xy T16_1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  T16_1917.vrt T16_1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES T16_1917.cut.vrt T16_1917.xyz