#!/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 26.92812045192719 57.550109168926106 -gcp 10482.0 0.0 26.92836185073853 57.52483486650494 -gcp 10482.0 10527.0 26.88074211502075 57.524356766535824 -gcp 0.0 10527.0 26.87988917255402 57.54975510201291 Aluksne-1989-1185/Aluksne-1989-1185-31.jpg Aluksne-1989-1185-31.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1005.0 1080.0\n9510.0 1032.0\n9528.0 9453.0\n1026.0 9504.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-31.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-31.vrt Aluksne-1989-1185-31.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-31.cut.vrt Aluksne-1989-1185-31.xyz