#!/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 3033.0 1455.0 25.337216666666666 56.25 -gcp 17661.0 1620.0 25.837216666666666 56.25 -gcp 17565.0 14775.0 25.837216666666666 56 -gcp 2820.0 14601.0 25.337216666666666 56 bruno/R17_Oniksta 1919.jpeg R17_Oniksta 1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3033.0 1455.0\n17661.0 1620.0\n17565.0 14775.0\n2820.0 14601.0" | \
  gdaltransform -tps -output_xy R17_Oniksta 1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  R17_Oniksta 1919.vrt R17_Oniksta 1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES R17_Oniksta 1919.cut.vrt R17_Oniksta 1919.xyz