#!/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 26.894871261330923 57.40908656047586 -gcp 11058.0 0.0 26.89988493919373 57.38256208545867 -gcp 11058.0 10989.0 26.849735793658585 57.37977000308284 -gcp 0.0 10989.0 26.845489740371708 57.406716059579814 Aluksne-1989-1186/Aluksne-1989-1186-92.jpg Aluksne-1989-1186-92.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1653.0 921.0\n10119.0 1467.0\n9552.0 9846.0\n1092.0 9312.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-92.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-92.vrt Aluksne-1989-1186-92.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-92.cut.vrt Aluksne-1989-1186-92.xyz