#!/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 26.839588260082635 57.372921452422396 -gcp 11508.0 0.0 26.832335673609876 57.34450114948576 -gcp 11508.0 11733.0 26.779340803521823 57.34826482667515 -gcp 0.0 11733.0 26.78660411883054 57.3766825413591 Aluksne-1989-1186/Aluksne-1989-1186-118.jpg Aluksne-1989-1186-118.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1059.0 2058.0\n9404.25 1026.0\n10425.0 9459.0\n2070.0 10485.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-118.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-118.vrt Aluksne-1989-1186-118.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-118.cut.vrt Aluksne-1989-1186-118.xyz