#!/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 26.991680860519413 57.42413657747327 -gcp 10506.0 0.0 26.992807388305668 57.39780903879697 -gcp 10506.0 13386.0 26.93207144737244 57.39691301483985 -gcp 0.0 13386.0 26.929678916931156 57.42301590470909 Aluksne-1989-1186/Aluksne-1989-1186-42.jpg Aluksne-1989-1186-42.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1050.0 1044.0\n1023.0 9552.0\n9459.0 9564.0\n9489.0 1035.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-42.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-42.vrt Aluksne-1989-1186-42.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-42.cut.vrt Aluksne-1989-1186-42.xyz