#!/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 23.436801338250657 56.66143351379099 -gcp 0.0 15975.0 23.46713344992135 56.66247708894339 -gcp 11994.0 15975.0 23.468550810310585 56.64993493473567 -gcp 11994.0 0.0 23.438228724007118 56.64889172302103 06_Rajons_Livberze/LNA_KFFDA_F106_1_4107N.jpg LNA_KFFDA_F106_1_4107N.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 15975.0\n11994.0 15975.0\n11994.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4107N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4107N.vrt LNA_KFFDA_F106_1_4107N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4107N.cut.vrt LNA_KFFDA_F106_1_4107N.xyz