#!/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 339.0 789.0 21 57 -gcp 14718.0 585.0 21.5 57 -gcp 14925.0 13902.0 21.5 56.75 -gcp 420.0 14097.0 21 56.75 Lat075_004_Pavilosta_ca1930.jpg Lat075_004_Pavilosta_ca1930.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e \"339.0 789.0\n14718.0 585.0\n14925.0 13902.0\n420.0 14097.0\" | \
  gdaltransform -tps -output_xy Lat075_004_Pavilosta_ca1930.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}'))))" \
  Lat075_004_Pavilosta_ca1930.vrt Lat075_004_Pavilosta_ca1930.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Lat075_004_Pavilosta_ca1930.cut.vrt Lat075_004_Pavilosta_ca1930.xyz