#!/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 26.897068054199224 57.53324255179034 -gcp 10485.0 0.0 26.897786886215215 57.507818138139925 -gcp 10485.0 13260.0 26.83657554764331 57.507346012905984 -gcp 0.0 13260.0 26.83662622498812 57.53319335757593 Aluksne-1989-1185/Aluksne-1989-1185-3.jpg Aluksne-1989-1185-3.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1008.0 1005.0\n9480.0 990.0\n9489.0 9411.0\n999.0 9429.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-3.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-3.vrt Aluksne-1989-1185-3.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-3.cut.vrt Aluksne-1989-1185-3.xyz