#!/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 26.612065034866337 57.443861717587495 -gcp 10506.0 0.0 26.61250491714478 57.41725451304454 -gcp 10506.0 10518.0 26.56280378723145 57.41668834425576 -gcp 0.0 10518.0 26.562036675453186 57.443408460809096 Aluksne-1989-1186/Aluksne-1989-1186-191.jpg Aluksne-1989-1186-191.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1056.0 1011.0\n9546.0 1038.0\n9492.0 9465.0\n1023.0 9441.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-191.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-191.vrt Aluksne-1989-1186-191.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-191.cut.vrt Aluksne-1989-1186-191.xyz