#!/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 0.0 0.0 21.328432559967 56.61741458537 -gcp 11433.0 0.0 21.324065923691 56.588181965364 -gcp 11433.0 13119.0 21.263072490692 56.590639557294 -gcp 0.0 13119.0 21.267535686493 56.61991749946 Aizpute-1988-991/Aizpute-1988-991-72.jpg Aizpute-1988-991-72.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "219.0 1920.0\n10020.0 885.0\n11061.0 10722.0\n1221.0 11748.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-72.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-72.vrt Aizpute-1988-991-72.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-72.cut.vrt Aizpute-1988-991-72.xyz