#!/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 26.932344984595055 57.43206024962739 -gcp 11487.0 0.0 26.924282904660238 57.40475962367325 -gcp 11487.0 11529.0 26.872974785582603 57.4092045591744 -gcp 0.0 11529.0 26.880892026230615 57.43652833073444 Aluksne-1989-1186/Aluksne-1989-1186-75.jpg Aluksne-1989-1186-75.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1182.0 2082.0\n9633.0 963.0\n10719.0 9330.0\n2259.0 10446.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-75.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-75.vrt Aluksne-1989-1186-75.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-75.cut.vrt Aluksne-1989-1186-75.xyz