#!/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 2475.0 3723.0 20.710266666666666 56.59578333333333 -gcp 43902.0 3357.0 21.898233333333334 56.677033333333334 -gcp 44214.0 32622.0 22.0042 56.20791666666667 -gcp 2871.0 33087.0 20.8318 56.12565 1915_3verst_de_126k/loc/Reihe_IX_Blatt_1_Libau_1915_loc.jpg Reihe_IX_Blatt_1_Libau_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2691.0 18409.50249861188\n2475.0 3723.0\n23478.0 3492.079955580233\n43902.0 3357.0\n43981.5 18069.044142143255\n44214.0 32622.0\n23529.0 32895.02165463631\n2871.0 33087.0" | \
  gdaltransform -tps -output_xy Reihe_IX_Blatt_1_Libau_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_IX_Blatt_1_Libau_1915_loc.vrt Reihe_IX_Blatt_1_Libau_1915_loc.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Reihe_IX_Blatt_1_Libau_1915_loc.cut.vrt Reihe_IX_Blatt_1_Libau_1915_loc.xyz