#!/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 26.772933202743534 57.484464579501925 -gcp 10521.0 0.0 26.772536387031654 57.458213682281624 -gcp 10521.0 10635.0 26.723242801666263 57.458134161351545 -gcp 0.0 10635.0 26.723714870452884 57.484822164386784 Aluksne-1989-1186/Aluksne-1989-1186-138.jpg Aluksne-1989-1186-138.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 1017.0\n9489.0 1092.0\n9378.0 9612.0\n960.0 9516.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-138.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-138.vrt Aluksne-1989-1186-138.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-138.cut.vrt Aluksne-1989-1186-138.xyz