#!/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 26.714244809923578 57.45103924356697 -gcp 11145.0 0.0 26.7093863067627 57.42315974109248 -gcp 11145.0 11208.0 26.657567881530625 57.425599794417934 -gcp 0.0 11208.0 26.662726801872253 57.453713427751644 Aluksne-1989-1186/Aluksne-1989-1186-166.jpg Aluksne-1989-1186-166.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1026.0 1530.0\n9441.0 966.0\n10000.5 9450.0\n1605.0 10056.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-166.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-166.vrt Aluksne-1989-1186-166.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-166.cut.vrt Aluksne-1989-1186-166.xyz