#!/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 27.024854421615604 57.414315082231006 -gcp 10506.0 0.0 27.023320198059086 57.38810190931169 -gcp 10506.0 10620.0 26.974439620971683 57.38898658445515 -gcp 0.0 10620.0 26.97654247283936 57.41532046218219 Aluksne-1989-1186/Aluksne-1989-1186-40.jpg Aluksne-1989-1186-40.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1032.0 1035.0\n1008.0 9546.0\n9444.0 9555.0\n9477.0 1041.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-40.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-40.vrt Aluksne-1989-1186-40.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-40.cut.vrt Aluksne-1989-1186-40.xyz