#!/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 23.021533325452285 57.0109624430881 -gcp 0.0 16164.0 23.04539550945673 57.00580664004431 -gcp 12342.0 16164.0 23.038178996307618 56.99586565638481 -gcp 12342.0 0.0 23.014322208504797 57.00102011017466 V_Rajons_Jaunsati_DA/LNA_KFFDA_F106_1_4784N.jpg LNA_KFFDA_F106_1_4784N.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 16164.0\n12342.0 16164.0\n12342.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_4784N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_4784N.vrt LNA_KFFDA_F106_1_4784N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_4784N.cut.vrt LNA_KFFDA_F106_1_4784N.xyz