#!/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 27.019310745859283 57.39620982617847 -gcp 10512.0 0.0 27.01982607402134 57.37091227617481 -gcp 10512.0 10608.0 26.972226453152317 57.370661930337995 -gcp 0.0 10608.0 26.972333397481712 57.396300627992794 Aluksne-1989-1186/Aluksne-1989-1186-26.jpg Aluksne-1989-1186-26.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1074.0 1053.0\n9492.0 1074.0\n9468.0 9549.0\n1047.0 9564.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-26.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-26.vrt Aluksne-1989-1186-26.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-26.cut.vrt Aluksne-1989-1186-26.xyz