#!/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 26.71010255813599 57.55015457801811 -gcp 11100.0 0.0 26.715960502624515 57.52208573089753 -gcp 11100.0 11394.0 26.662809848785404 57.518807511397725 -gcp 0.0 11394.0 26.656715869903568 57.54699402559202 Aluksne-1989-1185/Aluksne-1989-1185-170.jpg Aluksne-1989-1185-170.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1857.0 1029.0\n987.0 9510.0\n9384.0 10365.0\n10248.0 1866.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-170.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-170.vrt Aluksne-1989-1185-170.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-170.cut.vrt Aluksne-1989-1185-170.xyz