#!/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 21.570187628067 56.538412744392 -gcp 11280.0 0.0 21.575386796422 56.510139018828 -gcp 11280.0 12708.0 21.517850717003 56.506666954556 -gcp 0.0 12708.0 21.512308225895 56.535100390181 Aizpute-1988-991/Aizpute-1988-991-28.jpg Aizpute-1988-991-28.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1089.0 795.0\n508.5 10684.5\n10371.0 11224.5\n10915.5 1344.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-28.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-28.vrt Aizpute-1988-991-28.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-28.cut.vrt Aizpute-1988-991-28.xyz