#!/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 555.0 867.0 23.337216666666666 56.5 -gcp 11412.0 849.0 23.837216666666666 56.5 -gcp 11448.0 10680.0 23.837216666666666 56.25 -gcp 510.0 10701.0 23.337216666666666 56.25 bruno/N16_Skajzgiry 1921.jpg N16_Skajzgiry 1921.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "555.0 867.0\n11412.0 849.0\n11448.0 10680.0\n510.0 10701.0" | \
  gdaltransform -tps -output_xy N16_Skajzgiry 1921.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  N16_Skajzgiry 1921.vrt N16_Skajzgiry 1921.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES N16_Skajzgiry 1921.cut.vrt N16_Skajzgiry 1921.xyz