Windows internal gps using the location api not found

Windows internal gps using the location api not found

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Contents

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Choose this command from the GPS menu for mobile mapping with GPS. The GPS device must be connected to the computer via the COM interface with Bluetooth.

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Real Time GPS Settings

When you choose the Real Time GPS command from the GPS menu, the Real Time GPS Settings dialog appears.

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Connection Settings

There are two Connection Settings:

Choose this option to connect your GPS device with a COM port.

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Windows Location API

Internal or external GPS devices can be connected using the Windows Location API. This options is recommended if the Windows computer does not anymore support COM ports.

Choose a sensor from the sensor list and click the Test button to test the connection settings. The real time GPS works still in the habitual way.

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Requirements

The following requirements can be given:

Options

— You can also choose the length of the tail.
— The tail color is the same as the mark color, which can be set in the OCAD Preferences.
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Coordinate system

Click the Change button to change the coordinate system. The Coordinate System dialog box appears.

Click the Connect button to turn on the real time GPS mode. The GPS box is displayed in the lower right corner if the connection to the GPS device was successful.

Close the Real Time GPS Settings dialog or click the Disconnect button to turn off real time GPS.

Test GPS

Click the Test button in the Real Time GPS Settings dialog to open the Test GPS dialog.

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GGA message example:

RMC message example:

OCAD takes the serial data apart and displays it in a bit more user-friendly view below the Serial data box.

Mapping with Real Time GPS

The GPS box is displayed in the lower right corner if OCAD is successfully connected to a GPS device.

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The following information is given in this box:

Below the information part of the box, there are several icons:

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Example: Connection of tablet SURFACE and Garmin GLO

Connection of tablet SURFACE with OS Windows 10 and OCAD Orienteering subscription and Garmin GLO.

Example: Connection of a notebook and Navilock BT-821G

Connection of a notebook with OS Windows 10 and OCAD Orienteering subscription and Navilock BT-821G Bluetooth GNSS Receiver MT3333.

Example: Connection of rugged tablet and Garmin GLO

Connection of rugged tablet with OS Windows and OCAD Orienteering subscription and Garmin GLO.

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This function is obsolete! If you want to import GPS data from GPS devices, import the waypoints and tracks with the corresponding software of the GPS device to the computer. Then use the Import from File function in OCAD. As an alternative, for fieldwork, use the Real Time GPS function.

Choose this command to import tracks or waypoints from a GPS Garmin eTrex device. The GPS device must be connected to the PC with a serial data cable or Bluetooth.

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Import from GPS Settings

In this dialog box you can make the setting for the GPS data import. Verify also your settings on the GPS device (e.g. data format: GARMIN)!

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Choose this command from the GPS menu to import a GPS data file to the current map. The Load GPS data from files dialog box is displayed. Initially all importable GPS data files are listed. The following file types can be imported:

The Import from File dialog appears, where all available waypoints and tracks from the imported file are listed. There are several options in the OCAD objects part of the dialog:

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Click the Import button to import all selected tracks or waypoints in the list.

GPS Map Offset

This dialog box appears if the GPS coordinates are out of the maximum map size. Adjust the following parameters:

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Read more about using the «TruPulse 360/360B» Laser Rangefinder on the Laser Rangefinder page

Источник

Writing a location sensor driver for Windows 8.1

The Sensor and Location Platform provides the Windows Location API to enable software developers to add location features to their programs easily. If you are writing a driver for a location sensor, you must understand how to make the driver compatible with the Location API and follow the guidelines in Location Driver Guidelines for Power and Performance.

Windows Hardware Certification Program requirements

The Windows Hardware Certification Program enables hardware manufacturers to receive certification that their devices meet the required standards for working with Windows. The certification program describes the requirements for location sensors and other types of sensors. You should make your location sensor driver comply with all the certification program requirements. These requirements include the following:

Location sensors must support the required set of data and sensor properties.

Location sensors must support the required data fields for at least one built-in data report type.

Generally, the recommendations in this WDK documentation match the Certification Program requirements. However, you must review the official Certification Program documentation when you create sensor drivers that you intend to submit for approval. For more information about the Windows Hardware Certification Program, see the Windows Hardware Developer Central website.

Location API requirements

You create drivers for location sensors by using the same driver model and class extension as for any other category of sensor. At a minimum, to work as a location sensor, the driver must:

Identify the location sensor as belonging to the Location category.

Set the sensor type to one of the location sensor types.

Identify the location report data fields the sensor provides.

Support the required properties.

Provide data, when it is requested.

Manage state transitions.

Raise data-updated and state-changed events.

The rest of this section describes these minimum requirements

Identifying the category

When it is called through ISensorDriver::OnGetProperties, set the WPD_FUNCTIONAL_OBJECT_CATEGORY property value to SENSOR_CATEGORY_LOCATION. The following code example shows how to set this constant through a pointer to IPortableDeviceValues named pValues.

Setting the location sensor type

When it is called through ISensorDriver::OnGetProperties, set the SENSOR_PROPERTY_TYPE property value to the correct value. The following code example shows how to set the sensor type by using the SENSOR_TYPE_LOCATION_GPS constant through a pointer to IPortableDeviceValues named pValues.

Identifying the supported data fields

The Location API defines two kinds of location reports. These are objects that organize location data. LatLong reports contain latitude, longitude, and altitude data fields, together with data fields that contain error range information. Civic address reports contain street address data fields, such as city and postal code. Your location driver must support the required data fields for at least one of these two data report types.

To support a LatLong report, the following data fields are required:

To support a civic address report, at least one of the following data fields is required:

To view the complete set of platform-defined location data fields, see SENSOR_CATEGORY_LOCATION in the Windows Sensor Reference section.

When they are called through ISensorDriver::OnGetSupportedDataFields, add the supported data field property key constants to the IPortableDeviceKeyCollection that you return through the ppSupportedDataFields parameter. The following code example shows how to add the postal code data field to IPortableDeviceKeyCollection through a variable named pKeyCollection.

Support the required properties

Like other sensor drivers, location drivers provide information about the sensor itself through a set of properties. The Windows Hardware Certification Program specifies the minimum required set of properties that a location sensor must support. For more information about sensor properties, their meanings, and which properties are required for sensor drivers, see Sensor Properties. The following list contains the required properties:

Providing data

Location drivers provide data through the same mechanisms as other sensor drivers. That is, the sensor class extension calls the driver through ISensorDriver::OnGetDataFields and the driver returns the values through the ppDataValues parameter.

The following requirements apply to providing data from a location sensor:

Provide data both through synchronous requests and by raising events.

Maintain a copy of your most recent data report. If new data is not available when you request it, return the cached report. Do not update the time stamp.

Do not provide values for SENSOR_DATA_TYPE_LATITUDE_DEGREES and SENSOR_DATA_TYPE_LONGITUDE_DEGREES that fall outside the range of real-world latitudes and longitudes.

Do not report a value for SENSOR_DATA_TYPE_ERROR_RADIUS_METERS that is zero or less.

Set the value for SENSOR_DATA_TYPE_COUNTRY_REGION to a valid ISO 3166 1-alpha-2 country code.

If your driver supports both latitude/longitude and civic address reports, the location data in these reports should correspond to the same physical location.

The following table describes the sensor data fields that correspond to Location API data report fields. Use these data field constants when you provide data reports for a location.

Sensor constantLocation API method and property
SENSOR_DATA_TYPE_ADDRESS1ICivicAddressReport::GetAddressLine1

LocationDisp.DispCivicAddressReport.AddressLine1

SENSOR_DATA_TYPE_ADDRESS2ICivicAddressReport::GetAddressLine2

LocationDisp.DispCivicAddressReport.AddressLine2

SENSOR_DATA_TYPE_ALTITUDE_ELLIPSOID_ERROR_METERSILatLongReport::GetAltitudeError

LocationDisp.DispLatLongReport.AltitudeError

SENSOR_DATA_TYPE_ALTITUDE_ELLIPSOID_METERSILatLongReport::GetAltitude

LocationDisp.DispLatLongReport.Altitude

SENSOR_DATA_TYPE_CITYICivicAddressReport::GetCity

Windows.Devices. Geolocation.CivicAddress

SENSOR_DATA_TYPE_COUNTRY_REGIONICivicAddressReport::GetCountryRegion

LocationDisp.DispCivicAddressReport.CountryRegion

SENSOR_DATA_TYPE_ERROR_RADIUS_METERSILatLongReport::GetErrorRadius

LocationDisp.DispLatLongReport.ErrorRadius

SENSOR_DATA_TYPE_LATITUDE_DEGREESILatLongReport::GetLatitude

LocationDisp.DispLatLongReport.Latitude

SENSOR_DATA_TYPE_LONGITUDE_DEGREESILatLongReport::GetLongitude

LocationDisp.DispLatLongReport.Longitude

SENSOR_DATA_TYPE_POSTALCODEICivicAddressReport::GetPostalCode

LocationDisp.DispCivicAddressReport.PostalCode

SENSOR_DATA_TYPE_STATE_PROVINCEICivicAddressReport::GetStateProvince

Managing state transitions

At any time, a sensor driver can be in one of a number of states. Sensor states are defined by the SensorState enumeration. To work correctly with the Location API, location sensors must follow these rules for handling state transitions.

Always start in the SENSOR_STATE_INITIALIZING state, but do not raise a state-changed event at startup.

The driver should transition from SENSOR_STATE_INITIALIZING to SENSOR_STATE_READY when data is available.

The driver should transition back to SENSOR_STATE_INITIALIZING when the driver does not have current data to report. The driver should decide when that transition occurs. If you have lost a signal, but still have a means to provide valid data, stay in the SENSOR_STATE_READY state.

Always raise events in the correct order. First, establish that data is available. Then, raise a state-changed event. Finally, raise the data-updated event.

Always raise a state-changed event when the driver’s state changes.

-The Location API does not use data from sensors that are in the following states: SENSOR_STATE_NO_DATA, SENSOR_STATE_NOT_AVAILABLE, SENSOR_STATE_ERROR.

The various sensor states for location sensor drivers are described in the following table.

ValueDescriptionLocation API state
SENSOR_STATE_READYSensor driver can provide new location reports that have complete and accurate data.

For example, a Wi-Fi or cellular provider is connected and working, or a GPS sensor has a fix.

A GPS driver that has used data from a triangulation sensor to determine location has this state.

REPORT_RUNNING
SENSOR_STATE_INITIALIZINGSensor driver is trying to acquire a fix. The sensor driver should leave this state to transition to SENSOR_STATE_READY, after a fix is locked and tracking.

For example, a Wi-Fi provider is looking for an Internet connection, a cellular provider is looking for radios, or a GPS sensor is acquiring a fix.

GPS sensors should re-enter this state when they try to reacquire a fix.

REPORT_INITIALIZING
SENSOR_STATE_NO_DATAThe location provider is available, but is unable to provide location data.

For example, a Wi-Fi provider has access to the Internet, but the database has no location data.

REPORT_ERROR
SENSOR_STATE_NOT_AVAILABLEThe functionality that the location provider uses to acquire data is disabled.

A GPS sensor could be in this state if the radio is turned off.

REPORT_ERROR
SENSOR_STATE_ERRORThe sensor has encountered a major error. The sensor can recover from this state, but the time frame for recovery is not known.REPORT_ERROR

The following diagram shows how state transitions may occur in a location sensor.Windows internal gps using the location api not found. Смотреть фото Windows internal gps using the location api not found. Смотреть картинку Windows internal gps using the location api not found. Картинка про Windows internal gps using the location api not found. Фото Windows internal gps using the location api not found

Raising data-updated and state-changed events

The Location API, requires location sensors, such as GPS sensors, to raise events that provide data and state-change information. For more information about raising sensor events, see About Sensor Driver Events.

When raising these events, location drivers must follow these rules:

Raise state change events by calling the sensor class extension’s ISensorClassExtension::PostStateChange method. Do not call PostEvent to raise state change events.

Raise data-updated events by calling PostEvent.

Raise a data-updated event only if the data is up to date and accurate.

Do not raise a data-updated event twice. This means that you should not raise a data-updated event by using cached data. You can provide cached data in response to a synchronous request for data.

Always include all the required data fields when you send a latitude/longitude report through an event.

Always raise a data-updated event when the sensor accuracy changes.

Report a valid value for SENSOR_DATA_TYPE_ERROR_RADIUS_METERS before raising events or changing the value for SENSOR_PROPERTY_STATE to SENSOR_STATE_READY.

Do not provide incomplete data reports.

You might not have current data for the required data fields, such as when a GPS sensor has lost its fix. In this case, you might still want to provide notifications about updates to extended data fields, such as SENSOR_DATA_TYPE_NMEA_SENTENCE. To provide such notifications, you must use a custom event type and raise only the custom event until data for the required data fields becomes available. For information about how to define custom types, see Defining Custom Values for Constants.

Источник

This tutorial describes the usage of the fused location provider.

1. Android Location API

1.1. Determine the current geolocation

Most Android devices allow to determine the current geo location. This can be done via a GPS (Global Positioning System) module, via cell tower triangulation and via wifi networks.

Google Play provides the fused location provider to retrieve the device’s last known location.

1.2. Installation

To use the location manager make the Google play service available via your app build.gradle file.

Also specify the following required permission in your manifest.

1.3. Using the LocationManager

Now you can access the last known location. The fuse location provider provides a new simple API. The following is an example activity which uses it.

1.4. Forward and reverse Geocoding

The Geocoder class allows to determine the geo-coordinates (longitude, laditude) for a given address and possible addresses for given geo-coordinates.

This process is known as forward and reverse geocoding. The Geocoder class uses an online Google service.

1.5. Security

If you want to access the GPS sensor, you need the ACCESS_FINE_LOCATION permission. Otherwise you need the ACCESS_COARSE_LOCATION permission.

1.6. Prompt the user to Enabled GPS

The user can decide if the GPS is enabled or not.

You can find out, if a LocationManager is enabled via the isProviderEnabled() method. If its not enabled you can send the user to the settings via an Intent with the Settings.ACTION_LOCATION_SOURCE_SETTINGS action for the android.provider.Settings class.

Typically you would open an AlarmDialog prompt the user and if he wants to enable GPS or if the application should be canceled.

You cannot enable the GPS directly in your code, the user has to do this.

2. Using GPS and setting the current location

2.1. Activating GPS on the emulator

The Google Map activity should automatically activate the GPS device in the emulator but if you want to use the location manager directly you need to do this yourself. Currently their seems to be an issue with this.

Start Google Maps on the emulator and request the current geo-position, this will allow you to activate the GPS. Send new GPS coordinates to the Android emulator.

2.2. Setting the geoposition

In the Emulator Control part you can enter the geocoordinates and press the Send button.

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You can also set the geoposition the Android emulator via telnet. Open a console and connect to your device. The port number of your device can be seen in the title area of your emulator.

Set the position via the following command.

Источник

Using the Geolocation API

Secure context

This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The Geolocation API is used to retrieve the user’s location, so that it can for example be used to display their position using a mapping API. This article explains the basics of how to use it.

The geolocation object

The Geolocation API is available through the navigator.geolocation object.

If the object exists, geolocation services are available. You can test for the presence of geolocation thusly:

Getting the current position

To obtain the user’s current location, you can call the getCurrentPosition() method. This initiates an asynchronous request to detect the user’s position, and queries the positioning hardware to get up-to-date information. When the position is determined, the defined callback function is executed. You can optionally provide a second callback function to be executed if an error occurs. A third, optional, parameter is an options object where you can set the maximum age of the position returned, the time to wait for a request, and if you want high accuracy for the position.

The above example will cause the doSomething() function to execute when the location is obtained.

Watching the current position

Note: You can use watchPosition() without an initial getCurrentPosition() call.

The watchPosition() method returns an ID number that can be used to uniquely identify the requested position watcher; you use this value in tandem with the clearWatch() method to stop watching the user’s location.

Fine tuning the response

Both getCurrentPosition() and watchPosition() accept a success callback, an optional error callback, and an optional PositionOptions object.

This object allows you to specify whether to enable high accuracy, a maximum age for the returned position value (up until this age it will be cached and reused if the same position is requested again; after this the browser will request fresh position data), and a timeout value that dictates how long the browser should attempt to get the position data for, before it times out.

A call to watchPosition could look like:

Describing a position

The user’s location is described using a GeolocationPosition object instance, which itself contains a GeolocationCoordinates object instance.

The GeolocationPosition instance contains only two things, a coords property that contains the GeolocationCoordinates instance, and a timestamp property that contains a DOMTimeStamp instance representing the time at which the position data was retrieved.

You can however get a number of other bits of information from a GeolocationCoordinates object, including altitude, speed, what direction the device is facing, and an accuracy measure of the altitude, longitude, and latitude data.

Handling errors

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