#!/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 3216.0 1950.0 23.337216666666666 57 -gcp 24849.0 1974.0 23.837216666666666 57 -gcp 24990.0 21690.0 23.837216666666666 56.75 -gcp 3198.0 21726.0 23.337216666666666 56.75 bruno/N14_Schlok_1917[1].jpg N14_Schlok_1917[1].vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "3216.0 1950.0\n24849.0 1974.0\n24990.0 21690.0\n3198.0 21726.0" | \
  gdaltransform -tps -output_xy N14_Schlok_1917[1].vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  N14_Schlok_1917[1].vrt N14_Schlok_1917[1].cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES N14_Schlok_1917[1].cut.vrt N14_Schlok_1917[1].xyz