#!/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 23.045178194854287 56.97009844870048 -gcp 0.0 16323.0 23.04387813453141 56.95491406011251 -gcp 11787.0 16323.0 23.02380877309267 56.95542523509507 -gcp 11787.0 0.0 23.02510068206804 56.970609803762045 27_Rajons_Tukums_II_R/LNA_KFFDA_F106_1_5560N.jpg LNA_KFFDA_F106_1_5560N.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 16323.0\n11787.0 16323.0\n11787.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_5560N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_5560N.vrt LNA_KFFDA_F106_1_5560N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_5560N.cut.vrt LNA_KFFDA_F106_1_5560N.xyz