#!/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 0.0 0.0 21.516701134054 56.659761319611 -gcp 10941.0 0.0 21.513118622068 56.632055341033 -gcp 10941.0 12243.0 21.457015719736 56.634144756057 -gcp 0.0 12243.0 21.460587502886 56.661883103044 Aizpute-1988-991/Aizpute-1988-991-107.jpg Aizpute-1988-991-107.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "273.0 1173.0\n10086.0 354.0\n10821.75 9017.25\n10877.25 10225.5\n1077.0 11046.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-107.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-107.vrt Aizpute-1988-991-107.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-107.cut.vrt Aizpute-1988-991-107.xyz