#!/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 21.365468502045 56.598997718282 -gcp 11235.0 0.0 21.36815071106 56.569910432184 -gcp 11235.0 12948.0 21.308187246323 56.568485921683 -gcp 0.0 12948.0 21.305365562439 56.597089975821 Aizpute-1988-991/Aizpute-1988-991-66.jpg Aizpute-1988-991-66.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "877.5 1242.0\n10746.0 1506.0\n10467.0 11427.0\n598.5 11151.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-66.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-66.vrt Aizpute-1988-991-66.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-66.cut.vrt Aizpute-1988-991-66.xyz