#!/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 525.0 852.0 25 56.5 -gcp 11430.0 804.0 25.25 56.5 -gcp 11535.0 13941.0 25.25 56.333333333333336 -gcp 546.0 13986.0 25 56.333333333333336 mapster/RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.jpg RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "525.0 852.0\n11430.0 804.0\n11535.0 13941.0\n546.0 13986.0" | \
  gdaltransform -tps -output_xy RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.vrt RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.cut.vrt RKKA050_O-35-123-C_Mz._Daudzese_1939_greif.xyz