#!/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 21.567674875259 56.596528856764 -gcp 10572.0 0.0 21.567385196686 56.569815860535 -gcp 10572.0 12258.0 21.510833501816 56.570016825006 -gcp 0.0 12258.0 21.511670351028 56.596788744521 Aizpute-1988-991/Aizpute-1988-991-57.jpg Aizpute-1988-991-57.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "414.0 1026.0\n10263.0 730.5\n10510.5 9376.5\n10494.0 10590.0\n699.0 10884.0" | \
  gdaltransform -tps -output_xy Aizpute-1988-991-57.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aizpute-1988-991-57.vrt Aizpute-1988-991-57.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aizpute-1988-991-57.cut.vrt Aizpute-1988-991-57.xyz