#!/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 2862.0 2955.0 23.004 57.22128333333333 -gcp 43881.0 2997.0 24.215583333333335 57.2808 -gcp 43884.0 32379.0 24.295066666666667 56.80938333333334 -gcp 2874.0 32328.0 23.093783333333334 56.74915 1880_3vers_ru_126k/VTK_Ryad_VIII_List_3_1901.jpg VTK_Ryad_VIII_List_3_1901.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2856.0 17653.50666296502\n2862.0 2955.0\n23409.0 2982.0033314825096\n43881.0 2997.0\n43887.0 17693.252915047196\n43884.0 32379.0\n23367.0 32324.983342587453\n2874.0 32328.0" | \
  gdaltransform -tps -output_xy VTK_Ryad_VIII_List_3_1901.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VTK_Ryad_VIII_List_3_1901.vrt VTK_Ryad_VIII_List_3_1901.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VTK_Ryad_VIII_List_3_1901.cut.vrt VTK_Ryad_VIII_List_3_1901.xyz