FilteredGps Class |  |
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In some instances (particularly at low speeds) a GPS device may report erroneous
heading and speed information. FilteredGps encapsulates and filters the heading and
location of a raw GPS device. It also provides the capability to report the location
of the device ahead of time, using a prediction factor (see the FilteredGps constructor).
FilteredGps implements the IGps interface and may be used as a drop-in replacement for other GPS devices.
Inheritance HierarchyNamespace: Telogis.GeoBase.Navigation
Assembly: geobase.net (in geobase.net.dll) Version: 4.99.0.0
SyntaxThe FilteredGps type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | FilteredGps |
Create a new FilteredGps from a given source GPS device, a FilterMode
and a prediction factor (in seconds, see remarks).
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Properties| Name | Description | |
|---|---|---|
 | HeadingSpeedThreshold |
If the inner GPS reports a speed lower than this threshold, then
the heading is estimated instead of using the source GPS's heading.
The units for this property should be the same as the speed units
for the source GPS.
|
| HeadingUpdateDistance |
When the inner GPS reports a speed lower than the HeadingSpeedThreshold
the heading is updated when the vehicle has traveled this distance. The
unit for this property is Meters.
|
| InnerGps |
Returns the IGps member encapsulated within this FilteredGps object.
|
| Position |
Get the Position of the filtered GPS unit.
|
| PoweredUp |
Determine the powered state of the (inner) GPS unit.
|
Methods| Name | Description | |
|---|---|---|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| PowerDown |
Power down the (inner) GPS unit.
|
| PowerUp |
Power up the (inner) GPS unit.
|
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Events| Name | Description | |
|---|---|---|
 | GPSException |
An eventhandler called when this GPS device experiences a fatal exception.
|
| Update |
An eventhandler to be fired when the position of this GPS device is updated.
|
Fields| Name | Description | |
|---|---|---|
 | FixTypeChangeBuffer |
This is the number of position updates that a fix must stay the same type
before it will be considered to have changed to that type
|
See Also