#!/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 26.926046623352 57.411963584774 -gcp 10506.0 0.0 26.924770756015 57.386475755604 -gcp 10506.0 10584.0 26.877030106529 57.386916398874 -gcp 0.0 10584.0 26.877662243702 57.41270460948 Aluksne-1989-1186/Aluksne-1989-1186-72.jpg Aluksne-1989-1186-72.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1077.0 1071.0\n9579.0 1083.0\n9546.0 9501.0\n1050.0 9498.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-72.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-72.vrt Aluksne-1989-1186-72.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-72.cut.vrt Aluksne-1989-1186-72.xyz