#!/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 26.834109025955 57.46883301604 -gcp 10503.0 0.0 26.833840805054 57.442733339189 -gcp 10503.0 10623.0 26.785234016418 57.442802615234 -gcp 0.0 10623.0 26.785974306107 57.46914460293 Aluksne-1989-1186/Aluksne-1989-1186-112.jpg Aluksne-1989-1186-112.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1029.0 1023.0\n9432.0 1035.0\n9417.0 9534.0\n996.0 9549.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-112.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-112.vrt Aluksne-1989-1186-112.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-112.cut.vrt Aluksne-1989-1186-112.xyz