#!/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 23.503515627030893 56.63521787069058 -gcp 0.0 16269.0 23.53441901517182 56.63512641519985 -gcp 12213.0 16269.0 23.53428923391513 56.62234095630804 -gcp 12213.0 0.0 23.503396292806023 56.62243239861909 06_Rajons_Livberze/LNA_KFFDA_F106_1_4181N.jpg LNA_KFFDA_F106_1_4181N.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 16269.0\n12213.0 16269.0\n12213.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4181N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4181N.vrt LNA_KFFDA_F106_1_4181N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4181N.cut.vrt LNA_KFFDA_F106_1_4181N.xyz