#!/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 21.493697221278 56.681584656227 -gcp 10506.0 0.0 21.493883069583 56.65466610346 -gcp 10506.0 12006.0 21.438263727857 56.654488004302 -gcp 0.0 12006.0 21.438174439076 56.681380091771 Aizpute-1988-991/Aizpute-1988-991-113.jpg Aizpute-1988-991-113.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "450.0 807.0\n10308.0 696.0\n10428.0 10596.0\n555.0 10713.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-113.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-113.vrt Aizpute-1988-991-113.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-113.cut.vrt Aizpute-1988-991-113.xyz