#!/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 561.0 894.0 27.626666666666665 56 -gcp 10497.0 891.0 28.076666666666668 56 -gcp 10488.0 10758.0 28.076666666666668 55.75 -gcp 495.0 10707.0 27.626666666666665 55.75 bruno/VIII-24_1923_1-100000_Polsky.jpg VIII-24_1923_1-100000_Polsky.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "561.0 894.0\n10497.0 891.0\n10488.0 10758.0\n495.0 10707.0" | \
  gdaltransform -tps -output_xy VIII-24_1923_1-100000_Polsky.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  VIII-24_1923_1-100000_Polsky.vrt VIII-24_1923_1-100000_Polsky.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES VIII-24_1923_1-100000_Polsky.cut.vrt VIII-24_1923_1-100000_Polsky.xyz