#!/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 1251.0 1293.0 23.837216666666666 56.5 -gcp 15810.0 1407.0 24.337216666666666 56.5 -gcp 15783.0 14556.0 24.337216666666666 56.25 -gcp 1149.0 14481.0 23.837216666666666 56.25 bruno/O16_Bauske 1921.jpeg O16_Bauske 1921.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1251.0 1293.0\n15810.0 1407.0\n15783.0 14556.0\n1149.0 14481.0" | \
  gdaltransform -tps -output_xy O16_Bauske 1921.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  O16_Bauske 1921.vrt O16_Bauske 1921.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES O16_Bauske 1921.cut.vrt O16_Bauske 1921.xyz