#!/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 306.0 711.0 24 58 -gcp 8151.0 558.0 27 58 -gcp 8379.0 5481.0 27 57 -gcp 297.0 5631.0 24 57 RKKA500_O-35-V_Riga_1940_greif_NORTH.jpg RKKA500_O-35-V_Riga_1940_greif_NORTH.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "306.0 711.0\n4220.25 665.2670928293496\n8151.0 558.0\n8379.0 5481.0\n297.0 5631.0" | \
  gdaltransform -tps -output_xy RKKA500_O-35-V_Riga_1940_greif_NORTH.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA500_O-35-V_Riga_1940_greif_NORTH.vrt RKKA500_O-35-V_Riga_1940_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-V_Riga_1940_greif_NORTH.cut.vrt RKKA500_O-35-V_Riga_1940_greif_NORTH.xyz