#!/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 21.439631608074 56.65931901918 -gcp 10503.0 0.0 21.439561843872 56.632429578973 -gcp 10503.0 11991.0 21.383562872524 56.632614295971 -gcp 0.0 11991.0 21.384357547687 56.659621872212 Aizpute-1988-991/Aizpute-1988-991-104.jpg Aizpute-1988-991-104.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 855.0\n237.0 10741.5\n10110.0 10464.0\n9819.0 573.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-104.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-104.vrt Aizpute-1988-991-104.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-104.cut.vrt Aizpute-1988-991-104.xyz