#!/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 21.293719410896 56.660227548317 -gcp 10572.0 0.0 21.293853521347 56.632996067694 -gcp 10572.0 11901.0 21.238836050034 56.632712825427 -gcp 0.0 11901.0 21.237988471985 56.659923872241 Aizpute-1988-991/Aizpute-1988-991-98.jpg Aizpute-1988-991-98.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "238.5 694.5\n379.5 10597.5\n10269.0 10426.5\n10086.0 520.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-98.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-98.vrt Aizpute-1988-991-98.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-98.cut.vrt Aizpute-1988-991-98.xyz