#!/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 23.477181093730568 56.664125840214744 -gcp 0.0 16257.0 23.507910366319702 56.66677774877554 -gcp 12216.0 16257.0 23.511523206939728 56.654061561360216 -gcp 12216.0 0.0 23.480804013507978 56.651410557764294 06_Rajons_Livberze/LNA_KFFDA_F106_1_4163N.jpg LNA_KFFDA_F106_1_4163N.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 16257.0\n12216.0 16257.0\n12216.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4163N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4163N.vrt LNA_KFFDA_F106_1_4163N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4163N.cut.vrt LNA_KFFDA_F106_1_4163N.xyz