#!/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 26.55412617397309 57.478312146651824 -gcp 10506.0 0.0 26.55509713363648 57.45146685926341 -gcp 10506.0 10542.0 26.505295007705687 57.450987810777065 -gcp 0.0 10542.0 26.50404509830475 57.47731992440522 Aluksne-1989-1186/Aluksne-1989-1186-216.jpg Aluksne-1989-1186-216.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1068.0 1041.0\n9555.0 1044.0\n9546.0 9477.0\n1038.0 9468.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-216.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-216.vrt Aluksne-1989-1186-216.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-216.cut.vrt Aluksne-1989-1186-216.xyz