#!/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 23.319417626708464 56.60328215998205 -gcp 0.0 16197.0 23.332560659570696 56.61769473212152 -gcp 12186.0 16197.0 23.352225353836797 56.61223888954595 -gcp 12186.0 0.0 23.339076696539447 56.597828369046105 04_Rajons_DobeleD/LNA_KFFDA_F106_1_3836N.jpg LNA_KFFDA_F106_1_3836N.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 16197.0\n12186.0 16197.0\n12186.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_3836N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_3836N.vrt LNA_KFFDA_F106_1_3836N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_3836N.cut.vrt LNA_KFFDA_F106_1_3836N.xyz