#!/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 23.105165311545434 56.983350598703886 -gcp 0.0 16437.0 23.112952883841803 56.96884716004906 -gcp 11949.0 16437.0 23.093649185245642 56.965754585368366 -gcp 11949.0 0.0 23.085854779681938 56.98025680810745 27_Rajons_Tukums_II_R/LNA_KFFDA_F106_1_5543N.jpg LNA_KFFDA_F106_1_5543N.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 16437.0\n11949.0 16437.0\n11949.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_5543N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_5543N.vrt LNA_KFFDA_F106_1_5543N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_5543N.cut.vrt LNA_KFFDA_F106_1_5543N.xyz