#!/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 2469.0 3348.0 25.429566666666666 57.33153333333333 -gcp 43656.0 3603.0 26.647333333333332 57.37153333333333 -gcp 43356.0 32823.0 26.69558333333333 56.89803333333333 -gcp 2400.0 32502.0 25.490083333333335 56.85845 1915_3verst_de_126k/loc/Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.jpg Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2478.0 17935.505830094393\n2469.0 3348.0\n23034.0 3383.9483620210995\n43656.0 3603.0\n43485.0 18234.011660188782\n43356.0 32823.0\n22815.0 32627.980843975565\n2400.0 32502.0" | \
  gdaltransform -tps -output_xy Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.vrt Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.cut.vrt Reihe_VIII_Blatt_5_Ronnenburg_1915_loc.xyz