#!/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 22.422826450336274 57.02770360634066 -gcp 0.0 16062.0 22.445397985865814 57.03134864881182 -gcp 11895.0 16062.0 22.450344943436075 57.022232502589596 -gcp 11895.0 0.0 22.4277784166054 57.01858837365813 38_Rajons_Sabile_Vane/LNA_KFFDA_F106_1_8377N.jpg LNA_KFFDA_F106_1_8377N.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 16062.0\n11895.0 16062.0\n11895.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_8377N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_8377N.vrt LNA_KFFDA_F106_1_8377N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_8377N.cut.vrt LNA_KFFDA_F106_1_8377N.xyz