#!/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 26.832141259086978 57.46200875597136 -gcp 11298.0 0.0 26.838958931313442 57.434497431075066 -gcp 11298.0 11580.0 26.786492312518327 57.43074074744534 -gcp 0.0 11580.0 26.780511489504402 57.458396590488604 Aluksne-1989-1186/Aluksne-1989-1186-113.jpg Aluksne-1989-1186-113.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2469.0 867.0\n10779.0 2109.0\n9537.0 10500.0\n1209.0 9285.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-113.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-113.vrt Aluksne-1989-1186-113.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-113.cut.vrt Aluksne-1989-1186-113.xyz