#!/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 22.88972499618473 56.90416029925517 -gcp 0.0 16419.0 22.91755911967994 56.910127117775126 -gcp 12258.0 16419.0 22.92569599332835 56.898756461918545 -gcp 12258.0 0.0 22.89786898311674 56.892791472005364 10_Rajons_Irlava/LNA_KFFDA_F106_1_4473N.jpg LNA_KFFDA_F106_1_4473N.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 16419.0\n12258.0 16419.0\n12258.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4473N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4473N.vrt LNA_KFFDA_F106_1_4473N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4473N.cut.vrt LNA_KFFDA_F106_1_4473N.xyz