#!/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 1168.5 37854.35853251806 22.337216666666666 55.75 -gcp 1514.25 3594.5824068927177 23.837216666666666 55.75 -gcp 31195.5 3732.209282934964 23.837216666666666 55 -gcp 30782.25 38536.883963312954 22.337216666666666 55 Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.JPG Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "16344.75 3627.731676846197\n1514.25 3592.499167129373\n1495.5 14060.993337034979\n1410.0 24553.071071626873\n1167.75 37853.998334258744\n15933.0 38232.01998889506\n30783.0 38538.0\n31017.75 21141.754580788453\n31194.0 3728.9850083287065" | \
  gdaltransform -tps -output_xy Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.vrt Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.cut.vrt Lietuv.un_Latv.dienvidu_dalas_top.kartes_Varni-Kelme-Baisogala_6828_A1_L35_2_02.xyz