#!/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 23.5249449085099 56.53815363351118 -gcp 0.0 16365.0 23.555400493806086 56.53486593041001 -gcp 12138.0 16365.0 23.55098353020616 56.5223843219673 -gcp 12138.0 0.0 23.520537588144364 56.5256709663798 07_Rajons_Zalenieki/LNA_KFFDA_F106_1_4268N.jpg LNA_KFFDA_F106_1_4268N.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 16365.0\n12138.0 16365.0\n12138.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4268N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4268N.vrt LNA_KFFDA_F106_1_4268N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4268N.cut.vrt LNA_KFFDA_F106_1_4268N.xyz