#!/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 26.959682942265 57.506427390487 -gcp 10482.0 0.0 26.959047371434 57.479832820769 -gcp 10482.0 10518.0 26.909616411379 57.480142416206 -gcp 0.0 10518.0 26.91035927057 57.506592791487 Aluksne-1989-1186/Aluksne-1989-1186-50.jpg Aluksne-1989-1186-50.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1074.0 963.0\n9528.0 957.0\n9516.0 9372.0\n1056.0 9381.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-50.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-50.vrt Aluksne-1989-1186-50.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-50.cut.vrt Aluksne-1989-1186-50.xyz