#!/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 1713.0 2778.258823529412 25.5 56.75 -gcp 16024.5 2706.3327731092436 26 56.75 -gcp 16116.0 16137.944537815127 26 56.5 -gcp 1662.0 16068.719327731093 25.5 56.5 Latvijas_dalas_Lietuvas_dalas_un_Iga_dmh1cmC.kartes_Plavinas_6828_A1_L25_63_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1713.0 2778.258823529412\n16024.5 2706.3327731092436\n16116.0 16137.944537815127\n1662.0 16068.719327731093\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Plavinas_6828_A1_L25_63_02.xyz