#!/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 26.520768275151134 57.48806464466484 -gcp 10932.0 0.0 26.523846360374872 57.45988147379787 -gcp 10932.0 11049.0 26.471120014066056 57.45826541686399 -gcp 0.0 11049.0 26.468567641809337 57.4863129664884 Aluksne-1989-1186/Aluksne-1989-1186-226.jpg Aluksne-1989-1186-226.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1419.0 1020.0\n9825.0 1413.0\n9399.0 9888.0\n993.0 9480.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-226.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-226.vrt Aluksne-1989-1186-226.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-226.cut.vrt Aluksne-1989-1186-226.xyz