#!/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 363.0 0.0 27 56.97416666666667 -gcp 8388.0 0.0 30 56.96233333333333 -gcp 8526.0 4725.0 30 56 -gcp 294.0 4782.0 27 56 RKKA500_O-35-G_Pskov_1941_greif_SOUTH.jpg RKKA500_O-35-G_Pskov_1941_greif_SOUTH.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "363.0 0.0\n8388.0 0.0\n8526.0 4725.0\n4406.25 4803.0275152862705\n294.0 4782.0" | \
  gdaltransform -tps -output_xy RKKA500_O-35-G_Pskov_1941_greif_SOUTH.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA500_O-35-G_Pskov_1941_greif_SOUTH.vrt RKKA500_O-35-G_Pskov_1941_greif_SOUTH.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_SOUTH.cut.vrt RKKA500_O-35-G_Pskov_1941_greif_SOUTH.xyz