#!/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 26.77358987998963 57.47412963192704 -gcp 10500.0 0.0 26.772967607498174 57.44781900670892 -gcp 10500.0 10608.0 26.724176213415205 57.448033381174895 -gcp 0.0 10608.0 26.724839179992678 57.474423865858355 Aluksne-1989-1186/Aluksne-1989-1186-139.jpg Aluksne-1989-1186-139.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 1017.0\n9474.0 1038.0\n9423.0 9543.0\n1011.0 9507.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-139.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-139.vrt Aluksne-1989-1186-139.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-139.cut.vrt Aluksne-1989-1186-139.xyz