#!/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 26.775197175608895 57.67463388788284 -gcp 10857.0 0.0 26.770545930385055 57.647901052063204 -gcp 10857.0 11016.0 26.719441315553055 57.650036652583196 -gcp 0.0 11016.0 26.724347967767955 57.67753818931581 Aluksne-1989-1185/Aluksne-1989-1185-138.jpg Aluksne-1989-1185-138.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1017.0 1401.0\n1413.0 9921.0\n9849.0 9495.0\n9450.0 1002.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-138.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-138.vrt Aluksne-1989-1185-138.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-138.cut.vrt Aluksne-1989-1185-138.xyz