#!/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 627.0 705.0 25.5 56 -gcp 5436.0 720.0 26.166666666666668 56 -gcp 5457.0 5085.0 26.166666666666668 55.666666666666664 -gcp 597.0 5064.0 25.5 55.666666666666664 2_izdevums/41_Eglaine.jpg 41_Eglaine.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "2142.0 717.0045248868779\n2140.5 254.24358974358967\n252.0 243.74585218702867\n249.75 5520.754901960784\n5807.625 5545.872171945702\n5815.875 2931.3676470588234\n5448.75 2929.1146304675717\n5439.75 720.0060331825039" | \
  gdaltransform -tps -output_xy 41_Eglaine.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  41_Eglaine.vrt 41_Eglaine.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 41_Eglaine.cut.vrt 41_Eglaine.xyz