#!/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 26.65065628548702 57.434679270697025 -gcp 11349.0 0.0 26.64661836853094 57.40631672896328 -gcp 11349.0 11409.0 26.5939990018421 57.40858974939656 -gcp 0.0 11409.0 26.59803691879818 57.43699002299329 Aluksne-1989-1186/Aluksne-1989-1186-8.jpg Aluksne-1989-1186-8.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1149.0 1764.0\n9528.0 1110.0\n10170.0 9579.0\n1767.0 10227.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-8.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-8.vrt Aluksne-1989-1186-8.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-8.cut.vrt Aluksne-1989-1186-8.xyz