#!/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 26.586300844192507 57.52184081647366 -gcp 10515.0 0.0 26.5844983997345 57.494853758285316 -gcp 10515.0 10527.0 26.533765083312993 57.49593753576336 -gcp 0.0 10527.0 26.536286359786992 57.523039230924574 Aluksne-1989-1186/Aluksne-1989-1186-201.jpg Aluksne-1989-1186-201.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "996.0 1032.0\n9471.0 954.0\n9531.0 9381.0\n1032.0 9459.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-201.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-201.vrt Aluksne-1989-1186-201.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-201.cut.vrt Aluksne-1989-1186-201.xyz