#!/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 696.0 729.0 22.833333333333332 57 -gcp 5406.0 720.0 23.5 57 -gcp 5445.0 5061.0 23.5 56.666666666666664 -gcp 690.0 5052.0 22.833333333333332 56.666666666666664 2_izdevums/16_Tukums.jpg 16_Tukums.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "693.0 723.0\n684.9360505973295 5060.812395891171\n5450.624736472242 5066.249583564686\n5409.0 714.0" | \
  gdaltransform -tps -output_xy 16_Tukums.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  16_Tukums.vrt 16_Tukums.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 16_Tukums.cut.vrt 16_Tukums.xyz