#!/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 26.54966834259 57.533372808224 -gcp 10506.0 0.0 26.551653177261 57.506296592793 -gcp 10506.0 10614.0 26.501357524872 57.505126690478 -gcp 0.0 10614.0 26.499276130676 57.532030712875 Aluksne-1989-1186/Aluksne-1989-1186-220.jpg Aluksne-1989-1186-220.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1068.0 1017.0\n9477.0 1041.0\n9418.5 10102.5\n1023.0 10074.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-220.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-220.vrt Aluksne-1989-1186-220.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-220.cut.vrt Aluksne-1989-1186-220.xyz