#!/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 23.311570604513097 56.598408012478636 -gcp 0.0 16110.0 23.31391643760277 56.61419161564129 -gcp 12057.0 16110.0 23.335340449373334 56.6132212498331 -gcp 12057.0 0.0 23.33298573752997 56.59743802780051 04_Rajons_DobeleD/LNA_KFFDA_F106_1_3841N.jpg LNA_KFFDA_F106_1_3841N.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 16110.0\n12057.0 16110.0\n12057.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_3841N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_3841N.vrt LNA_KFFDA_F106_1_3841N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_3841N.cut.vrt LNA_KFFDA_F106_1_3841N.xyz