#!/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 2653.5 2523.214285714286 26 56.25 -gcp 17286.152247787657 2534.871637633313 26.5 56.25 -gcp 17385.0 16006.870588235295 26.5 56 -gcp 2644.5 15996.888235294118 26 56 Latvijas_dalas_Lietuvas_dalas_un_Igau_ugZOF96.kartes_Bebrene_6828_A1_L25_73_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bebrene_6828_A1_L25_73_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"2653.5 2523.214285714286\n17286.152247787657 2534.871637633313\n17385.0 16006.870588235295\n2644.5 15996.888235294118\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bebrene_6828_A1_L25_73_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bebrene_6828_A1_L25_73_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bebrene_6828_A1_L25_73_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_Bebrene_6828_A1_L25_73_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Bebrene_6828_A1_L25_73_02.xyz