#!/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 708.0 708.0 27.5 57.333333333333336 -gcp 5370.0 693.0 28.166666666666668 57.333333333333336 -gcp 5418.0 5058.0 28.166666666666668 57 -gcp 714.0 5073.0 27.5 57 2_izdevums/55_Vilaka.jpg 55_Vilaka.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "708.0 708.0\n5828.25 697.8744343891402\n5852.25 5058.0\n714.0 5073.0" | \
  gdaltransform -tps -output_xy 55_Vilaka.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  55_Vilaka.vrt 55_Vilaka.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 55_Vilaka.cut.vrt 55_Vilaka.xyz