#!/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 26.716676614653803 57.396500356923575 -gcp 11646.0 0.0 26.705819896698003 57.36807146183708 -gcp 11646.0 11919.0 26.651383360711907 57.37382708516519 -gcp 0.0 11919.0 26.6628438911438 57.40280895902499 Aluksne-1989-1186/Aluksne-1989-1186-171.jpg Aluksne-1989-1186-171.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 2283.0\n9324.0 1047.0\n10563.0 9465.0\n2232.0 10701.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-171.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-171.vrt Aluksne-1989-1186-171.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-171.cut.vrt Aluksne-1989-1186-171.xyz