#!/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 26.988324387550357 57.532721926949904 -gcp 10485.0 0.0 26.9887106256485 57.50648388894118 -gcp 10485.0 10578.0 26.940143243789677 57.50591047154554 -gcp 0.0 10578.0 26.939177648544316 57.53233888076885 Aluksne-1989-1185/Aluksne-1989-1185-37.jpg Aluksne-1989-1185-37.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1116.0 1032.0\n9519.0 1050.0\n9477.0 9528.0\n1068.0 9507.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-37.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-37.vrt Aluksne-1989-1185-37.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-37.cut.vrt Aluksne-1989-1185-37.xyz