#!/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 26.677413556713777 57.42557764488848 -gcp 11616.0 0.0 26.68298464121434 57.396260517227 -gcp 11616.0 11433.0 26.630605070235795 57.39323984235258 -gcp 0.0 11433.0 26.62453509485846 57.422276675098146 Aluksne-1989-1186/Aluksne-1989-1186-180.jpg Aluksne-1989-1186-180.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2112.0 1038.0\n10473.0 1962.0\n9522.0 10407.0\n1161.0 9483.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-180.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-180.vrt Aluksne-1989-1186-180.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-180.cut.vrt Aluksne-1989-1186-180.xyz