#!/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 1569.0 939.0 26.837216666666666 57 -gcp 16026.0 930.0 27.337216666666666 57 -gcp 16071.0 14169.0 27.337216666666666 56.75 -gcp 1512.0 14151.0 26.837216666666666 56.75 bruno/U14 1915_Iwdini.jpg U14 1915_Iwdini.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1569.0 939.0\n16026.0 930.0\n16071.0 14169.0\n1512.0 14151.0" | \
  gdaltransform -tps -output_xy U14 1915_Iwdini.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  U14 1915_Iwdini.vrt U14 1915_Iwdini.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES U14 1915_Iwdini.cut.vrt U14 1915_Iwdini.xyz