> ## 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

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

## Location Class

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

```csharp theme={null}
public record Location : System.IEquatable<ResQ.Core.Location>
```

Inheritance [System.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object "System.Object") → Location

Implements [System.IEquatable\<](https://learn.microsoft.com/en-us/dotnet/api/system.iequatable-1 "System.IEquatable`1")[Location](./ResQ.Core.Location.md "ResQ.Core.Location")[>](https://learn.microsoft.com/en-us/dotnet/api/system.iequatable-1 "System.IEquatable`1")

### 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.

| Constructors                                                                                                                                                                                     |                                                                                   |
| :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------- |
| [Location(double, double, Nullable\<double>)](./ResQ.Core.Location.Location\(double,double,System.Nullable_double_\).md "ResQ.Core.Location.Location(double, double, System.Nullable\<double>)") | Represents a geographic location with latitude, longitude, and optional altitude. |

| Properties                                                                    |                                                |
| :---------------------------------------------------------------------------- | :--------------------------------------------- |
| [Altitude](./ResQ.Core.Location.Altitude.md "ResQ.Core.Location.Altitude")    | Altitude in meters above sea level (optional). |
| [Latitude](./ResQ.Core.Location.Latitude.md "ResQ.Core.Location.Latitude")    | Latitude in decimal degrees (-90 to 90).       |
| [Longitude](./ResQ.Core.Location.Longitude.md "ResQ.Core.Location.Longitude") | Longitude in decimal degrees (-180 to 180).    |

| Methods                                                                                                                              |                                                                                       |
| :----------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------ |
| [DistanceTo(Location)](./ResQ.Core.Location.DistanceTo\(ResQ.Core.Location\).md "ResQ.Core.Location.DistanceTo(ResQ.Core.Location)") | Calculates the great-circle distance to another location using the Haversine formula. |