#!/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 2736.0 1074.0 23.837216666666666 57 -gcp 17133.0 1047.0 24.337216666666666 57 -gcp 17172.0 14241.0 24.337216666666666 56.75 -gcp 2685.0 14244.0 23.837216666666666 56.75 bruno/O14 - Riga 1919.jpg O14 - Riga 1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2736.0 1074.0\n17133.0 1047.0\n17172.0 14241.0\n2685.0 14244.0" | \
  gdaltransform -tps -output_xy O14 - Riga 1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O14 - Riga 1919.vrt O14 - Riga 1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O14 - Riga 1919.cut.vrt O14 - Riga 1919.xyz