#!/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 26.589223724483414 57.51016650954074 -gcp 11313.0 0.0 26.58222019672394 57.48148477035495 -gcp 11313.0 11253.0 26.528624296188358 57.48532285086055 -gcp 0.0 11253.0 26.536115401902038 57.51414917148776 Aluksne-1989-1186/Aluksne-1989-1186-202.jpg Aluksne-1989-1186-202.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "936.0 1746.0\n9378.0 894.0\n10197.0 9279.0\n1761.0 10128.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-202.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-202.vrt Aluksne-1989-1186-202.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-202.cut.vrt Aluksne-1989-1186-202.xyz