#!/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 1957.5 35441.10116731518 23.837216666666666 57.25 -gcp 1782.0 13665.133407448582 24.837216666666666 57.25 -gcp 24481.5 2188.7167871039464 25.337216666666666 56.666666666666664 -gcp 24838.5 35442.25514174541 23.837216666666666 56.666666666666664 Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.JPG Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "18868.5 2340.004164353137\n11385.0 2532.0\n11640.0 13500.006662965021\n1781.25 13664.297890061076\n1953.75 35440.51249305941\n11796.0 35442.00333148251\n21216.0 35397.00499722376\n26538.0 35465.966685174906\n26352.0 2132.908384230983" | \
  gdaltransform -tps -output_xy Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.vrt Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.cut.vrt Latvijas_top.kartes_Rigas_aprinka_dienv.dala_un_Jaunjelgavas_6828_A1_L37_1_02.xyz