#!/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 1896.0 2064.1319327731094 22.5 57.78333333333333 -gcp 15888.0 2122.90756302521 23 57.78333333333333 -gcp 15969.0 17398.26386554622 23 57.5 -gcp 1848.0 17343.344537815126 22.5 57.5 Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1896.0 2064.1319327731094\n5097.0 2076.0268907563027\n5118.0 863.3176470588237\n6222.0 869.6621848739496\n6228.0 2084.998319327731\n15888.0 2122.90756302521\n15969.0 17398.26386554622\n1848.0 17343.344537815126\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_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_Roja_6828_A1_L25_19_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Roja_6828_A1_L25_19_02.xyz