#!/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 26.928629143714907 57.63384329127119 -gcp 10485.0 0.0 26.92908511924744 57.60800067368545 -gcp 10485.0 13266.0 26.867666677889847 57.60803161153168 -gcp 0.0 13266.0 26.867883062756473 57.63347747008862 Aluksne-1989-1185/Aluksne-1989-1185-23.jpg Aluksne-1989-1185-23.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1038.0 1074.0\n9528.0 1047.0\n9549.0 9480.0\n1029.0 9504.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-23.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-23.vrt Aluksne-1989-1185-23.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-23.cut.vrt Aluksne-1989-1185-23.xyz