#!/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 2319.0 3651.0 25.368466666666666 57.80485 -gcp 43440.0 3351.0 26.607166666666668 57.84356666666667 -gcp 43554.0 33210.0 26.647333333333332 57.37153333333333 -gcp 2475.0 33525.0 25.429566666666666 57.33153333333333 1915_3verst_de_126k/loc/Reihe_VII_Blatt_5_Wolmar_1915_loc.jpg Reihe_VII_Blatt_5_Wolmar_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2349.0 18604.5091615769\n2319.0 3651.0\n22882.5 3466.480843975569\n43440.0 3351.0\n43542.0 18294.00666296502\n43554.0 33210.0\n22996.5 33400.5183231538\n2475.0 33525.0" | \
  gdaltransform -tps -output_xy Reihe_VII_Blatt_5_Wolmar_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VII_Blatt_5_Wolmar_1915_loc.vrt Reihe_VII_Blatt_5_Wolmar_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_5_Wolmar_1915_loc.cut.vrt Reihe_VII_Blatt_5_Wolmar_1915_loc.xyz