#!/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 26.835518366902843 57.554425637246325 -gcp 10503.0 0.0 26.83716648902462 57.52873183194905 -gcp 10503.0 10554.0 26.78796356690556 57.52762415407216 -gcp 0.0 10554.0 26.787639303163036 57.554316804549224 Aluksne-1989-1185/Aluksne-1989-1185-115.jpg Aluksne-1989-1185-115.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1038.0 1026.0\n1002.0 9543.0\n9432.0 9558.0\n9474.0 1035.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-115.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-115.vrt Aluksne-1989-1185-115.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-115.cut.vrt Aluksne-1989-1185-115.xyz