#!/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 26.779700270643502 57.631903501432085 -gcp 11628.0 0.0 26.77086451515355 57.60296455464961 -gcp 11628.0 11895.0 26.716317532912182 57.60788816669349 -gcp 0.0 11895.0 26.725113375254264 57.63672021555816 Aluksne-1989-1185/Aluksne-1989-1185-142.jpg Aluksne-1989-1185-142.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1005.0 2283.0\n2184.0 10734.0\n10542.0 9543.0\n9366.0 1092.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-142.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-142.vrt Aluksne-1989-1185-142.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-142.cut.vrt Aluksne-1989-1185-142.xyz