#!/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 501.0 477.0 21.337216666666666 56.5 -gcp 8637.0 468.0 21.837216666666666 56.5 -gcp 8679.0 7815.0 21.837216666666666 56.25 -gcp 459.0 7782.0 21.337216666666666 56.25 bruno/J16_Priekule 1914.jpg J16_Priekule 1914.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "501.0 477.0\n8637.0 468.0\n8679.0 7815.0\n459.0 7782.0" | \
  gdaltransform -tps -output_xy J16_Priekule 1914.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  J16_Priekule 1914.vrt J16_Priekule 1914.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES J16_Priekule 1914.cut.vrt J16_Priekule 1914.xyz