#!/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 26.64564371109009 57.62026664970108 -gcp 11859.0 0.0 26.654516458511356 57.590567038509654 -gcp 11859.0 11829.0 26.599917411804203 57.58548917879875 -gcp 0.0 11829.0 26.590647697448734 57.61558368943303 Aluksne-1989-1185/Aluksne-1989-1185-184.jpg Aluksne-1989-1185-184.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2484.0 1065.0\n1155.0 9495.0\n9501.0 10785.0\n10830.0 2358.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-184.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-184.vrt Aluksne-1989-1185-184.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-184.cut.vrt Aluksne-1989-1185-184.xyz