#!/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 23.45687240471156 56.71424296941659 -gcp 0.0 16131.0 23.487906872880743 56.71542081756919 -gcp 12123.0 16131.0 23.489510835004097 56.70259374470476 -gcp 12123.0 0.0 23.458486869050123 56.70141631398955 06_Rajons_Livberze/LNA_KFFDA_F106_1_4125N.jpg LNA_KFFDA_F106_1_4125N.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 16131.0\n12123.0 16131.0\n12123.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4125N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4125N.vrt LNA_KFFDA_F106_1_4125N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4125N.cut.vrt LNA_KFFDA_F106_1_4125N.xyz