#!/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 26.928340393066406 57.51864423999159 -gcp 10485.0 0.0 26.928490596771244 57.492632643234835 -gcp 10485.0 10542.0 26.88009838485718 57.492517337270236 -gcp 0.0 10542.0 26.879610222816467 57.518537640457964 Aluksne-1989-1185/Aluksne-1989-1185-34.jpg Aluksne-1989-1185-34.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "996.0 1095.0\n9447.0 1068.0\n9465.0 9492.0\n1017.0 9513.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-34.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-34.vrt Aluksne-1989-1185-34.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-34.cut.vrt Aluksne-1989-1185-34.xyz