#!/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 294.0 333.0 21.837216666666666 56.5 -gcp 9702.0 279.0 22.337216666666666 56.5 -gcp 9762.0 8796.0 22.337216666666666 56.25 -gcp 294.0 8826.0 21.837216666666666 56.25 bruno/K16_Vaiņode-Ezere.jpg K16_Vaiņode-Ezere.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "294.0 333.0\n9048.0 297.0\n9044.25 5689.490421987784\n9087.0 8805.0\n294.0 8826.0" | \
  gdaltransform -tps -output_xy K16_Vaiņode-Ezere.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  K16_Vaiņode-Ezere.vrt K16_Vaiņode-Ezere.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES K16_Vaiņode-Ezere.cut.vrt K16_Vaiņode-Ezere.xyz