#!/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 23.107543666240872 56.87249072401233 -gcp 0.0 16398.0 23.13853515189618 56.873377032984926 -gcp 12162.0 16398.0 23.139730048824692 56.86078916903663 -gcp 12162.0 0.0 23.108748938165036 56.85990318705565 11_Rajons_Tukums_II/LNA_KFFDA_F106_1_4671N.jpg LNA_KFFDA_F106_1_4671N.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 16398.0\n12162.0 16398.0\n12162.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4671N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4671N.vrt LNA_KFFDA_F106_1_4671N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4671N.cut.vrt LNA_KFFDA_F106_1_4671N.xyz