#!/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 2748.0 3486.0 26.69558333333333 56.89803333333333 -gcp 43620.0 3213.0 27.908883333333332 56.924366666666664 -gcp 43641.0 32673.0 27.939783333333335 56.44968333333333 -gcp 2826.0 32889.0 26.743133333333333 56.423116666666665 1915_3verst_de_126k/loc/Reihe_IX_Blatt_6_Ljuzyn_1915_loc.jpg Reihe_IX_Blatt_6_Ljuzyn_1915_loc.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2748.0 3486.0\n43620.0 3213.0\n43641.0 32673.0\n22761.0 32693.951693503608\n2826.0 32889.0" | \
  gdaltransform -tps -output_xy Reihe_IX_Blatt_6_Ljuzyn_1915_loc.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Reihe_IX_Blatt_6_Ljuzyn_1915_loc.vrt Reihe_IX_Blatt_6_Ljuzyn_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_6_Ljuzyn_1915_loc.cut.vrt Reihe_IX_Blatt_6_Ljuzyn_1915_loc.xyz