#!/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 26.893950513501252 57.43875951436221 -gcp 10506.0 0.0 26.89369171735259 57.41385408811522 -gcp 10506.0 10524.0 26.846242604375497 57.41349713502037 -gcp 0.0 10524.0 26.84640484099963 57.43909288525804 Aluksne-1989-1186/Aluksne-1989-1186-89.jpg Aluksne-1989-1186-89.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1020.0 996.0\n9528.0 990.0\n9504.0 9408.0\n1027.5 9423.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-89.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-89.vrt Aluksne-1989-1186-89.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-89.cut.vrt Aluksne-1989-1186-89.xyz