#!/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 23.311262243336895 56.58308492988275 -gcp 0.0 16038.0 23.318059151427885 56.59840370133025 -gcp 12039.0 16038.0 23.338904389840856 56.59558616620386 -gcp 12039.0 0.0 23.33209953986022 56.58026850851279 04_Rajons_DobeleD/LNA_KFFDA_F106_1_3882N.jpg LNA_KFFDA_F106_1_3882N.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 16038.0\n12039.0 16038.0\n12039.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_3882N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_3882N.vrt LNA_KFFDA_F106_1_3882N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_3882N.cut.vrt LNA_KFFDA_F106_1_3882N.xyz