#!/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 26.927471357345585 57.5393589701272 -gcp 10485.0 0.0 26.92782004451752 57.5140588151192 -gcp 10485.0 13266.0 26.867067933263634 57.51358852430599 -gcp 0.0 13266.0 26.867040768208007 57.539255962228445 Aluksne-1989-1185/Aluksne-1989-1185-32.jpg Aluksne-1989-1185-32.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 1047.0\n9558.0 1035.0\n9558.0 9492.0\n1023.0 9507.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-32.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-32.vrt Aluksne-1989-1185-32.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-32.cut.vrt Aluksne-1989-1185-32.xyz