#!/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 321.0 642.0 23.337216666666666 56.75 -gcp 11145.0 636.0 23.837216666666666 56.75 -gcp 11160.0 10464.0 23.837216666666666 56.5 -gcp 282.0 10467.0 23.337216666666666 56.5 bruno/N15_Mittau 1919.jpg N15_Mittau 1919.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "321.0 642.0\n11145.0 636.0\n11160.0 10464.0\n282.0 10467.0" | \
  gdaltransform -tps -output_xy N15_Mittau 1919.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  N15_Mittau 1919.vrt N15_Mittau 1919.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES N15_Mittau 1919.cut.vrt N15_Mittau 1919.xyz