#!/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 26.863996982574466 57.56821455031114 -gcp 10485.0 0.0 26.863846778869632 57.542549214785055 -gcp 10485.0 13260.0 26.803658008575443 57.5422613197423 -gcp 0.0 13260.0 26.803035736083988 57.56832962657611 Aluksne-1989-1185/Aluksne-1989-1185-75.jpg Aluksne-1989-1185-75.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1074.0 1032.0\n1044.0 9483.0\n9465.0 9537.0\n9498.0 1029.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-75.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-75.vrt Aluksne-1989-1185-75.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-75.cut.vrt Aluksne-1989-1185-75.xyz