#!/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 1686.0 3297.0 27.84665 57.871916666666664 -gcp 42960.0 3312.0 29.086766666666666 57.8924 -gcp 42858.0 32976.0 29.101583333333334 57.41471666666666 -gcp 1515.0 33012.0 27.87815 57.39706666666667 1915_3verst_de_126k/loc/Reihe_VII_Blatt_7_Psskow_1915_loc.jpg Reihe_VII_Blatt_7_Psskow_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1686.0 3297.0\n42960.0 3312.0\n42858.0 32976.0\n1515.0 33012.0" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_7_Psskow_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_7_Psskow_1915_loc.vrt Reihe_VII_Blatt_7_Psskow_1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VII_Blatt_7_Psskow_1915_loc.cut.vrt Reihe_VII_Blatt_7_Psskow_1915_loc.xyz