#!/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 26.898453407908402 57.35613080738742 -gcp 10830.0 0.0 26.900463631706575 57.329834947399 -gcp 10830.0 10920.0 26.85088218220209 57.32893133708046 -gcp 0.0 10920.0 26.848995340018696 57.35545287195501 Aluksne-1989-1186/Aluksne-1989-1186-96.jpg Aluksne-1989-1186-96.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1383.0 1032.0\n9861.0 1422.0\n9456.0 9828.0\n984.0 9441.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-96.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-96.vrt Aluksne-1989-1186-96.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-96.cut.vrt Aluksne-1989-1186-96.xyz