#!/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 22.492679359621018 56.84664740890836 -gcp 0.0 16062.0 22.514040861996964 56.84296828247606 -gcp 12096.0 16062.0 22.508983559487742 56.8341522259809 -gcp 12096.0 0.0 22.487626612047958 56.837830515885756 38_Rajons_Sabile_Vane/LNA_KFFDA_F106_1_8540N.jpg LNA_KFFDA_F106_1_8540N.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 16062.0\n12096.0 16062.0\n12096.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_8540N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_8540N.vrt LNA_KFFDA_F106_1_8540N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_8540N.cut.vrt LNA_KFFDA_F106_1_8540N.xyz