OsmToDatabase/OsmToDatabase.Peaks/Program.cs

using OsmSharp;
using OsmSharp.Streams;
using OsmToDatabase.Common;

OsmContext db = new OsmContext();
long counter = 0;

HashSet<string> naturalPeakFeatures = new HashSet<string> { "peak", "volcano" };

async Task ProcessOsmElement(OsmGeo? element)
{
    if (element is Node node)
    {
        string? naturalValue = node.TagValueByKey("natural");

        // Skip if natural tag is missing.
        if (naturalValue is null)
        {
            return;
        }

        // Skip if the node is not a desired feature.
        if (!naturalPeakFeatures.Contains(naturalValue))
        {
            return;
        }

        // Skip if elevation is missing.
        if (node.TagDoubleValueByKey("ele") is null)
        {
            return;
        }

        Peak peak = new Peak
        {
            Id = node.Id.Value,
            Version = node.Version.Value,
            TimeStamp = node.TimeStamp.Value.ToUniversalTime(),
            Latitude = node.Latitude.Value,
            Longitude = node.Longitude.Value,
            Elevation = node.TagDoubleValueByKey("ele"),
            Prominence = node.TagDoubleValueByKey("prominence"),
            Isolation = node.TagDoubleValueByKey("isolation"),
            Name = node.TagValueByKey("name"),
            AlternativeName = node.TagValueByKey("alt_name"),
            EnglishName = node.TagValueByKey("name:en"),
            EnglishAlternativeName = node.TagValueByKey("alt_name:en"),
            ItalianName = node.TagValueByKey("name:it"),
            SlovenianName = node.TagValueByKey("name:sl"),
            GermanName = node.TagValueByKey("name:de"),
            SummitRegisterPresent = node.TagValueByKey("summit:register") == "yes",
            Wikidata = node.TagValueByKey("wikidata")
        };
        await db.AddAsync(peak);
        counter++;

        if ((counter % 50_000) == 0)
        {
            Console.WriteLine($"{counter}: Saving another batch.");
            await db.SaveChangesAsync();
        }
    }
}

using (var fileStream = new FileInfo(args[0]).OpenRead())
{
    var source = new PBFOsmStreamSource(fileStream);
    foreach (var element in source)
    {
        await ProcessOsmElement(element);
    }
    await db.SaveChangesAsync();
}