#!/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 387.0 747.0 27 58 -gcp 8163.0 699.0 30 58 -gcp 8316.0 5967.0 30 56.92 -gcp 330.0 5967.0 27 56.93233333333333 RKKA500_O-35-G_Pskov_1941_greif_NORTH.jpg RKKA500_O-35-G_Pskov_1941_greif_NORTH.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "387.0 747.0\n4271.25 761.2712618121178\n8163.0 699.0\n8316.0 5967.0\n330.0 5967.0" | \
  gdaltransform -tps -output_xy RKKA500_O-35-G_Pskov_1941_greif_NORTH.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA500_O-35-G_Pskov_1941_greif_NORTH.vrt RKKA500_O-35-G_Pskov_1941_greif_NORTH.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA500_O-35-G_Pskov_1941_greif_NORTH.cut.vrt RKKA500_O-35-G_Pskov_1941_greif_NORTH.xyz