#!/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 759.0 717.0 24.833333333333332 58 -gcp 5334.0 750.0 25.5 58 -gcp 5319.0 5094.0 25.5 57.666666666666664 -gcp 735.0 5061.0 24.833333333333332 57.666666666666664 2_izdevums/29_Rujiena.jpg 29_Rujiena.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "757.125 718.4796380090497\n732.0 5066.865761689291\n5324.25 5097.750377073907\n5334.75 750.0075414781297" | \
  gdaltransform -tps -output_xy 29_Rujiena.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  29_Rujiena.vrt 29_Rujiena.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 29_Rujiena.cut.vrt 29_Rujiena.xyz