#!/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 23.23225465910729 56.636142797409235 -gcp 0.0 16158.0 23.260930099568682 56.63632463630991 -gcp 12009.0 16158.0 23.261170814152727 56.62457921143266 -gcp 12009.0 0.0 23.2325042777178 56.624397452083706 04_Rajons_DobeleD/LNA_KFFDA_F106_1_3828N.jpg LNA_KFFDA_F106_1_3828N.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 16158.0\n12009.0 16158.0\n12009.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_3828N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_3828N.vrt LNA_KFFDA_F106_1_3828N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_3828N.cut.vrt LNA_KFFDA_F106_1_3828N.xyz