#!/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 630.0 873.0 24.837216666666666 57.25 -gcp 11421.0 963.0 25.337216666666666 57.25 -gcp 11367.0 11052.0 25.337216666666666 57 -gcp 513.0 10956.0 24.837216666666666 57 bruno/Q13 Ieriķi.jpg Q13 Ieriķi.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "630.0 873.0\n11421.0 963.0\n11367.0 11052.0\n513.0 10956.0" | \
  gdaltransform -tps -output_xy Q13 Ieriķi.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Q13 Ieriķi.vrt Q13 Ieriķi.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Q13 Ieriķi.cut.vrt Q13 Ieriķi.xyz