#!/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 26.71182990074158 57.60170364333244 -gcp 10707.0 0.0 26.712892055511478 57.574738800157014 -gcp 10707.0 10728.0 26.661812067031864 57.574554710374294 -gcp 0.0 10728.0 26.661511659622196 57.601427712918124 Aluksne-1989-1185/Aluksne-1989-1185-164.jpg Aluksne-1989-1185-164.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 10725.0\n10704.0 10725.0\n10704.0 0.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1185-164.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1185-164.vrt Aluksne-1989-1185-164.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1185-164.cut.vrt Aluksne-1989-1185-164.xyz