#!/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 639.0 705.0 23.5 56.333333333333336 -gcp 5439.0 726.0 24.166666666666668 56.333333333333336 -gcp 5451.0 5064.0 24.166666666666668 56 -gcp 615.0 5043.0 23.5 56 2_izdevums/21_Adzuni.jpg 21_Adzuni.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "244.5 698.2533936651583\n243.75 3336.748750694059\n243.74841883345044 5503.500832870627\n5831.25158116655 5528.249583564686\n5839.125790583275 2526.376873958912\n5836.5 725.2549019607843" | \
  gdaltransform -tps -output_xy 21_Adzuni.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  21_Adzuni.vrt 21_Adzuni.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 21_Adzuni.cut.vrt 21_Adzuni.xyz