#!/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 26.742610365868 57.410635148956 -gcp 10875.0 0.0 26.741113693237 57.383269254379 -gcp 10875.0 10953.0 26.690142124176 57.383650890238 -gcp 0.0 10953.0 26.690667837143 57.410964569665 Aluksne-1989-1186/Aluksne-1989-1186-151.jpg Aluksne-1989-1186-151.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1176.0 1401.0\n9657.0 1077.0\n9966.0 9504.0\n1461.0 9828.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-151.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-151.vrt Aluksne-1989-1186-151.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-151.cut.vrt Aluksne-1989-1186-151.xyz