#!/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 759.0 720.0 24.833333333333332 58.333333333333336 -gcp 5280.0 729.0 25.5 58.333333333333336 -gcp 5295.0 5082.0 25.5 58 -gcp 738.0 5058.0 24.833333333333332 58 2_izdevums/28_Ipiki.jpg 28_Ipiki.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "237.0 261.0\n246.75 5519.995475113122\n3237.0 5520.7507541478135\n3238.5 5345.981900452489\n5790.0 5368.640271493213\n5812.5 271.49773755656105" | \
  gdaltransform -tps -output_xy 28_Ipiki.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  28_Ipiki.vrt 28_Ipiki.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 28_Ipiki.cut.vrt 28_Ipiki.xyz