#!/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 630.0 693.0 27.5 56.333333333333336 -gcp 5424.0 708.0 28.166666666666668 56.333333333333336 -gcp 5442.0 5073.0 28.166666666666668 56 -gcp 612.0 5046.0 27.5 56 2_izdevums/58_Bukmuiza.jpg 58_Bukmuiza.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "630.0 693.0\n6057.0 709.187028657617\n6046.5 2161.8009049773755\n5821.5 2161.604826546003\n5812.5 5073.750377073907\n612.0 5046.0" | \
  gdaltransform -tps -output_xy 58_Bukmuiza.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  58_Bukmuiza.vrt 58_Bukmuiza.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 58_Bukmuiza.cut.vrt 58_Bukmuiza.xyz