#!/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 26.90245756984048 57.626886880990924 -gcp 11172.0 0.0 26.895884826576378 57.59956191164253 -gcp 11172.0 11214.0 26.844382863981256 57.60306808510967 -gcp 0.0 11214.0 26.850714208433914 57.630450439066095 Aluksne-1989-1185/Aluksne-1989-1185-12.jpg Aluksne-1989-1185-12.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1002.0 1773.0\n9426.0 1092.0\n10101.0 9474.0\n1668.0 10167.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-12.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-12.vrt Aluksne-1989-1185-12.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-12.cut.vrt Aluksne-1989-1185-12.xyz