#!/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 27.02015046408379 57.40654000702739 -gcp 10524.0 0.0 27.02058849215002 57.38099727086308 -gcp 10524.0 10626.0 26.972980251491762 57.380943604329715 -gcp 0.0 10626.0 26.973081347437432 57.40644613138184 Aluksne-1989-1186/Aluksne-1989-1186-25.jpg Aluksne-1989-1186-25.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1059.0 1053.0\n9489.0 1026.0\n9492.0 9549.0\n1056.0 9564.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-25.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-25.vrt Aluksne-1989-1186-25.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-25.cut.vrt Aluksne-1989-1186-25.xyz