#!/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 1359.0 2337.4176470588236 25 58.25 -gcp 15126.0 2326.864705882353 25.5 58.25 -gcp 15203.294776491153 15819.817532328238 25.5 58 -gcp 1371.0 15763.835294117649 25 58 Latvijas_dalas_Lietuvas_dalas_un_Ig_3Ybdomb.kartes_Meizakila_6828_A1_L25_49_02.JPG Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Meizakila_6828_A1_L25_49_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"1359.0 2337.4176470588236\n15126.0 2326.864705882353\n15203.294776491153 15819.817532328238\n1371.0 15763.835294117649\" | \
  gdaltransform -tps -output_xy Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Meizakila_6828_A1_L25_49_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Meizakila_6828_A1_L25_49_02.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Meizakila_6828_A1_L25_49_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_Meizakila_6828_A1_L25_49_02.cut.vrt Latvijas_dalas_Lietuvas_dalas_un_Igaunijas_top.kartes_Meizakila_6828_A1_L25_49_02.xyz