#!/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 26.712722318521962 57.366642542597006 -gcp 11499.0 0.0 26.708869716138768 57.337861377840696 -gcp 11499.0 11583.0 26.655547822977944 57.33991818474918 -gcp 0.0 11583.0 26.65959354441021 57.368930855090504 Aluksne-1989-1186/Aluksne-1989-1186-174.jpg Aluksne-1989-1186-174.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1098.0 1950.0\n9483.0 1086.0\n10335.0 9561.0\n1956.0 10425.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-174.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-174.vrt Aluksne-1989-1186-174.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-174.cut.vrt Aluksne-1989-1186-174.xyz