#!/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 26.98845950649764 57.400061358820494 -gcp 11940.0 0.0 26.995811457295062 57.371681832834405 -gcp 11940.0 11994.0 26.943440310988063 57.3673198651471 -gcp 0.0 11994.0 26.93581477487102 57.39583245684017 Aluksne-1989-1186/Aluksne-1989-1186-17.jpg Aluksne-1989-1186-17.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2472.0 1203.0\n10794.0 2511.0\n9453.0 10908.0\n1128.0 9606.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-17.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-17.vrt Aluksne-1989-1186-17.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-17.cut.vrt Aluksne-1989-1186-17.xyz