#!/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 2619.0 3312.0 25.429566666666666 57.33153333333333 -gcp 44352.0 2973.0 26.647333333333332 57.37153333333333 -gcp 44535.0 32607.0 26.69558333333333 56.89803333333333 -gcp 2850.0 32970.0 25.490083333333335 56.85845 1880_3vers_ru_126k/VTK_Ryad_VIII_List_5_1918.jpg VTK_Ryad_VIII_List_5_1918.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2727.75 18142.500832870628\n2619.0 3312.0\n23487.0 3147.0024986118824\n44352.0 2973.0\n44421.0 17791.500832870628\n44535.0 32607.0\n23694.0 32764.486674069958\n2850.0 32970.0" | \
  gdaltransform -tps -output_xy VTK_Ryad_VIII_List_5_1918.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VTK_Ryad_VIII_List_5_1918.vrt VTK_Ryad_VIII_List_5_1918.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VTK_Ryad_VIII_List_5_1918.cut.vrt VTK_Ryad_VIII_List_5_1918.xyz