#!/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 21.426129341125 56.555751606886 -gcp 10512.0 0.0 21.426354646683 56.528897367838 -gcp 10512.0 12327.0 21.369867324829 56.528453580608 -gcp 0.0 12327.0 21.369255781174 56.555260830254 Aizpute-1988-991/Aizpute-1988-991-35.jpg Aizpute-1988-991-35.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "150.0 1224.0\n10002.0 931.5\n10272.0 10857.0\n403.5 11131.5" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-35.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-35.vrt Aizpute-1988-991-35.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-35.cut.vrt Aizpute-1988-991-35.xyz