#!/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 555.0 837.0 24.25 57.833333333333336 -gcp 11124.0 831.0 24.5 57.833333333333336 -gcp 11163.0 14016.0 24.5 57.666666666666664 -gcp 531.0 14004.0 24.25 57.666666666666664 mapster/RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.jpg RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "555.0 837.0\n11124.0 831.0\n11163.0 14016.0\n531.0 14004.0" | \
  gdaltransform -tps -output_xy RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.vrt RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.cut.vrt RKKA050_O-35-73-D_Zalismyunde_ca1931_greif.xyz