#!/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 1065.0 1035.0 27.176666666666666 56.5 -gcp 10830.0 996.0 27.626666666666665 56.5 -gcp 10926.0 10803.0 27.626666666666665 56.25 -gcp 1077.0 10836.0 27.176666666666666 56.25 bruno/VI-23_1921_1-100000_Polsky.jpg VI-23_1921_1-100000_Polsky.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1065.0 1035.0\n10830.0 996.0\n10926.0 10803.0\n1077.0 10836.0" | \
  gdaltransform -tps -output_xy VI-23_1921_1-100000_Polsky.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VI-23_1921_1-100000_Polsky.vrt VI-23_1921_1-100000_Polsky.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VI-23_1921_1-100000_Polsky.cut.vrt VI-23_1921_1-100000_Polsky.xyz