#!/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 26.833581063130687 57.66053037695291 -gcp 10485.0 0.0 26.832449094357873 57.634435824756515 -gcp 10485.0 13344.0 26.770598420932117 57.63542590555517 -gcp 0.0 13344.0 26.772423766074077 57.66152056833625 Aluksne-1989-1185/Aluksne-1989-1185-105.jpg Aluksne-1989-1185-105.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "999.0 981.0\n966.0 9516.0\n9399.0 9528.0\n9435.0 993.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-105.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-105.vrt Aluksne-1989-1185-105.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-105.cut.vrt Aluksne-1989-1185-105.xyz