#!/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 26.959616887932935 57.36751122314425 -gcp 10506.0 0.0 26.960904909119737 57.34160391194692 -gcp 10506.0 12810.0 26.90259104561959 57.33989014610041 -gcp 0.0 12810.0 26.89948985113862 57.36616228840718 Aluksne-1989-1186/Aluksne-1989-1186-64.jpg Aluksne-1989-1186-64.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1041.0 968.25\n9492.0 996.0\n9450.0 9408.0\n987.0 9384.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-64.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-64.vrt Aluksne-1989-1186-64.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-64.cut.vrt Aluksne-1989-1186-64.xyz