#!/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 1660.5 2371.7436974789916 24.5 57.75 -gcp 15571.5 2413.879831932773 25 57.75 -gcp 15582.0 15799.972268907564 25 57.5 -gcp 1584.0 15738.340336134454 24.5 57.5 Latvijas_dalas_Lietuvas_dalas_un_Igau_v4fls7J.kartes_Limbazi_6828_A1_L25_43_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Limbazi_6828_A1_L25_43_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1660.5 2371.7436974789916\n15571.5 2413.879831932773\n15582.0 15799.972268907564\n1584.0 15738.340336134454\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Limbazi_6828_A1_L25_43_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Limbazi_6828_A1_L25_43_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Limbazi_6828_A1_L25_43_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_Limbazi_6828_A1_L25_43_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Limbazi_6828_A1_L25_43_02.xyz