#!/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 26.928281387751685 57.497098415088 -gcp 10506.0 0.0 26.927887270924572 57.47158241341032 -gcp 10506.0 13392.0 26.866707066836728 57.47090706295286 -gcp 0.0 13392.0 26.865899554025273 57.496939202204956 Aluksne-1989-1186/Aluksne-1989-1186-81.jpg Aluksne-1989-1186-81.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 1062.0\n9609.0 1098.0\n9540.0 9534.0\n1038.0 9498.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-81.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-81.vrt Aluksne-1989-1186-81.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-81.cut.vrt Aluksne-1989-1186-81.xyz