#!/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 26.64811392402649 57.508976980789214 -gcp 10632.0 0.0 26.64758821105957 57.48211867675739 -gcp 10632.0 10755.0 26.596760553359985 57.48211867675739 -gcp 0.0 10755.0 26.598069471359253 57.50955912129817 Aluksne-1989-1186/Aluksne-1989-1186-1.jpg Aluksne-1989-1186-1.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1089.0 1185.0\n9498.0 1056.0\n9588.0 9567.0\n1161.0 9663.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-1.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-1.vrt Aluksne-1989-1186-1.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-1.cut.vrt Aluksne-1989-1186-1.xyz