#!/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 26.928642366174724 57.50807771868149 -gcp 10506.0 0.0 26.9280764599873 57.48235416508756 -gcp 10506.0 10566.0 26.88033977607593 57.48221837415837 -gcp 0.0 10566.0 26.879092508969276 57.508045749162356 Aluksne-1989-1186/Aluksne-1989-1186-82.jpg Aluksne-1989-1186-82.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1053.0 1053.0\n9552.0 1056.0\n9546.0 9486.0\n1032.0 9474.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-82.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-82.vrt Aluksne-1989-1186-82.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-82.cut.vrt Aluksne-1989-1186-82.xyz