#!/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 26.990118456909258 57.41641714117577 -gcp 10500.0 0.0 26.98909553765904 57.39123414689313 -gcp 10500.0 10590.0 26.942543669948087 57.3914770329631 -gcp 0.0 10590.0 26.943250088534548 57.41683350127822 Aluksne-1989-1186/Aluksne-1989-1186-19.jpg Aluksne-1989-1186-19.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1083.0 951.0\n9519.0 1026.0\n9417.0 9552.0\n985.5 9462.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-19.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-19.vrt Aluksne-1989-1186-19.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-19.cut.vrt Aluksne-1989-1186-19.xyz