#!/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 300.0 165.0 24 57 -gcp 8301.0 21.0 27 57 -gcp 8484.0 4893.0 27 56 -gcp 297.0 5031.0 24 56 RKKA500_O-35-V_Riga_1940_greif_SOUTH.jpg RKKA500_O-35-V_Riga_1940_greif_SOUTH.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "300.0 165.0\n8301.0 21.0\n8484.0 4893.0\n4386.75 5009.27626459144\n297.0 5031.0" | \
  gdaltransform -tps -output_xy RKKA500_O-35-V_Riga_1940_greif_SOUTH.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA500_O-35-V_Riga_1940_greif_SOUTH.vrt RKKA500_O-35-V_Riga_1940_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-V_Riga_1940_greif_SOUTH.cut.vrt RKKA500_O-35-V_Riga_1940_greif_SOUTH.xyz