#!/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 1926.0 3726.0 27.75 56 -gcp 24006.0 3735.0 28 56 -gcp 24072.0 30036.0 28 55.833333333333336 -gcp 1989.0 30159.0 27.75 55.833333333333336 mapster/RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.jpg RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1926.0 3726.0\n24006.0 3735.0\n24072.0 30036.0\n1989.0 30159.0" | \
  gdaltransform -tps -output_xy RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.vrt RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.cut.vrt RKKA050_N-35-8-B_Rosica_6-1938_UInd-VAC9619-000412@1734522.xyz