#!/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 22.821545903637485 56.93521708920109 -gcp 0.0 16305.0 22.851180130027444 56.93817108775349 -gcp 12246.0 16305.0 22.85523289111006 56.926002750003306 -gcp 12246.0 0.0 22.825607964370487 56.923049744056236 10_Rajons_Irlava/LNA_KFFDA_F106_1_4426N.jpg LNA_KFFDA_F106_1_4426N.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 16305.0\n12246.0 16305.0\n12246.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4426N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4426N.vrt LNA_KFFDA_F106_1_4426N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4426N.cut.vrt LNA_KFFDA_F106_1_4426N.xyz