#!/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 1798.5 2517.21512605042 21.5 57 -gcp 15964.5 2550.368907563025 22 57 -gcp 16068.0 15837.352100840337 22 56.75 -gcp 1767.0 15838.877310924368 21.5 56.75 Latvijas_dalas_Lietuvas_dalas_un_Igau_GT4kFXd.kartes_Kuldiga_6828_A1_L25_10_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Kuldiga_6828_A1_L25_10_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1798.5 2517.21512605042\n15964.5 2550.368907563025\n15960.0 9321.070588235294\n15981.0 11267.265546218487\n15975.0 13013.699159663865\n15924.0 13527.12268907563\n15963.0 13602.028571428571\n15906.0 14088.176470588234\n15975.0 14529.314285714287\n15987.0 14925.282352941176\n15918.0 15830.99663865546\n1767.0 15838.877310924368\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Kuldiga_6828_A1_L25_10_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Kuldiga_6828_A1_L25_10_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Kuldiga_6828_A1_L25_10_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_Kuldiga_6828_A1_L25_10_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Kuldiga_6828_A1_L25_10_02.xyz