> ## Documentation Index
> Fetch the complete documentation index at: https://docs.resq.software/llms.txt
> Use this file to discover all available pages before exploring further.

# ResQ.Core.Location.Location(double,double,System.Nullable double )

### [ResQ.Core](./ResQ.Core.md "ResQ.Core").[Location](./ResQ.Core.Location.md "ResQ.Core.Location")

## Location(double, double, Nullable\<double>) Constructor

Represents a geographic location with latitude, longitude, and optional altitude.

```csharp theme={null}
public Location(double Latitude, double Longitude, System.Nullable<double> Altitude=null);
```

#### Parameters

<a name="ResQ.Core.Location.Location(double,double,System.Nullable_double_).Latitude" />

`Latitude` [System.Double](https://learn.microsoft.com/en-us/dotnet/api/system.double "System.Double")

Latitude in decimal degrees (-90 to 90).

<a name="ResQ.Core.Location.Location(double,double,System.Nullable_double_).Longitude" />

`Longitude` [System.Double](https://learn.microsoft.com/en-us/dotnet/api/system.double "System.Double")

Longitude in decimal degrees (-180 to 180).

<a name="ResQ.Core.Location.Location(double,double,System.Nullable_double_).Altitude" />

`Altitude` [System.Nullable\<](https://learn.microsoft.com/en-us/dotnet/api/system.nullable-1 "System.Nullable`1")[System.Double](https://learn.microsoft.com/en-us/dotnet/api/system.double "System.Double")[>](https://learn.microsoft.com/en-us/dotnet/api/system.nullable-1 "System.Nullable`1")

Altitude in meters above sea level (optional).

### Example

```csharp theme={null}
var location = new Location(37.7749, -122.4194); // San Francisco
var locationWithAlt = new Location(37.7749, -122.4194, 100.5);

// Calculate distance between two locations
var sf = new Location(37.7749, -122.4194);
var la = new Location(34.0522, -118.2437);
double distanceKm = sf.DistanceTo(la); // ~559 km
```

### Remarks

This record provides a standard way to represent geographic coordinates throughout
the ResQ system. It includes a method to calculate distance between locations
using the Haversine formula for great-circle distance.