#!/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 26.804493828296664 57.365187177886085 -gcp 10761.0 0.0 26.805354817390445 57.33818226985869 -gcp 10761.0 10818.0 26.75631000232697 57.33778279209253 -gcp 0.0 10818.0 26.754706041336064 57.36458537644133 Aluksne-1989-1186/Aluksne-1989-1186-122.jpg Aluksne-1989-1186-122.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1359.0 1014.0\n9771.0 1272.0\n9486.0 9780.0\n1062.0 9522.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-122.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-122.vrt Aluksne-1989-1186-122.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-122.cut.vrt Aluksne-1989-1186-122.xyz