Set latitude, longitude, altitude via API

API & Interfaces
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1

Hi all,

Recently been attempting to set the location-based base_data during model generation using the C# library. Currently on version 2.14.11 to version match with RFEM 6 6.14.0011. I am able to successfully set the string-based location data such as Country/Street/Zip/City, but whenever I try to set latitude/longitude/altitude using the API it fails to do so. All the values show up as 0.000 instead of the desired value.

I thought maybe it would require just the latitude & longitude, and everything else blank which would then lead to the other fields being auto-populated, but this wasn't the case either. I tried setting it before model generation, after model generation, and also in multiple phases but with no luck. I can only assume that currently the API has a limitation when it comes to setting the lat/long, or I've missed a method that is required to ensure it calculates.

Any help or pointers would be greatly appreciated!
Thank you!

3

Hi JamesSolar,

it seems that we have an issue here (Bug ID=700241). The dev team is informed, I guess this will be fixed within the next versions.

Happy coding.

Best regards
Robert Milrath

5

Hi James,

Latitude and longitude need to be provided in radians, not degrees.

The following example demonstrates setting the location data:

using Rfem = Dlubal.Api.Rfem;
using Common = Dlubal.Api.Common;

ApplicationRfem? rfemApp = null;

try
{
    rfemApp = new ApplicationRfem();

    var appInfo = rfemApp.get_application_info();
    Console.WriteLine(appInfo);

    // Create a new model
    Common.ModelId modelId = rfemApp.create_model("model_base_data");
    Console.WriteLine($"Created model: {modelId.Guid}");

    // Get the model's base data
    Rfem.BaseData baseData = rfemApp.get_base_data();

    // Make sure the location container exists before writing to it
    baseData.Location ??= new Rfem.BaseData.Types.Location();

    // Set the geographic location.
    // Altitude is specified in meters.
    // Latitude and longitude are specified in radians.
    baseData.Location.Altitude = 300.0;
    baseData.Location.Latitude = DegreesToRadians(49.4521);
    baseData.Location.Longitude = DegreesToRadians(11.0767);
    baseData.Location.TownCity = "Leipzig";

    // Transfer the modified base data back to the model
    rfemApp.set_base_data(baseData);

    Console.WriteLine(
        $"Base data set - altitude: {baseData.Location.Altitude} m, " +
        $"latitude: {baseData.Location.Latitude} rad, " +
        $"longitude: {baseData.Location.Longitude} rad");
}
catch (Exception ex)
{
    Console.WriteLine($"Error: {ex.Message}");
}
finally
{
    rfemApp?.close_connection();
}

static double DegreesToRadians(double degrees)
{
    return degrees * Math.PI / 180.0;
}

Regards

6

Thanks sincerely for your response, Tomas.

Got it working successfully with your help!