#!/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 669.0 693.0 24.833333333333332 57 -gcp 5358.0 696.0 25.5 57 -gcp 5385.0 5040.0 25.5 56.666666666666664 -gcp 657.0 5037.0 24.833333333333332 56.666666666666664 2_izdevums/32_Madliena.jpg 32_Madliena.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "669.0 693.0\n5358.0 696.0\n5385.0 5040.0\n657.0 5037.0" | \
  gdaltransform -tps -output_xy 32_Madliena.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  32_Madliena.vrt 32_Madliena.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 32_Madliena.cut.vrt 32_Madliena.xyz