#!/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 26.89462502574921 57.60588782091594 -gcp 10485.0 0.0 26.893074708938602 57.58091334550086 -gcp 10485.0 13266.0 26.83159016168846 57.58149279327482 -gcp 0.0 13266.0 26.833074502858587 57.607821219778096 Aluksne-1989-1185/Aluksne-1989-1185-10.jpg Aluksne-1989-1185-10.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "981.0 1008.0\n9501.0 984.0\n9513.0 9408.0\n1005.0 9435.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-10.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-10.vrt Aluksne-1989-1185-10.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-10.cut.vrt Aluksne-1989-1185-10.xyz