#!/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 702.0 690.0 24.837216666666666 56.5 -gcp 11856.0 849.0 25.337216666666666 56.5 -gcp 11754.0 11025.0 25.337216666666666 56.25 -gcp 528.0 10866.0 24.837216666666666 56.25 bruno/Q16_Zalve-Ērberģe 1921.jpg Q16_Zalve-Ērberģe 1921.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "702.0 690.0\n11856.0 849.0\n11754.0 11025.0\n528.0 10866.0" | \
  gdaltransform -tps -output_xy Q16_Zalve-Ērberģe 1921.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Q16_Zalve-Ērberģe 1921.vrt Q16_Zalve-Ērberģe 1921.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Q16_Zalve-Ērberģe 1921.cut.vrt Q16_Zalve-Ērberģe 1921.xyz