#!/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 26.925606751766765 57.60438369110688 -gcp 11475.0 0.0 26.929968070328012 57.57736570733811 -gcp 11475.0 11451.0 26.879487844222854 57.57396961040327 -gcp 0.0 11451.0 26.87288419892516 57.60186752380436 Aluksne-1989-1185/Aluksne-1989-1185-26.jpg Aluksne-1989-1185-26.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2010.0 1032.0\n10473.0 1905.0\n9591.0 10287.0\n1125.0 9408.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-26.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-26.vrt Aluksne-1989-1185-26.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-26.cut.vrt Aluksne-1989-1185-26.xyz