GPS in WPFStudents: Ziv Dayan & Viki Kravchenko

Instructor: Viktor Kulikov

GPS• Global Positioning System• At least 24 satellites

• Other systems: Galileo, GLONASS, Beidou-2

Server

Project Overview

Uses• Sitting in a train, recording the route and

saving a marker on each train station. Thus getting a view of the train system in Israel.

• Recording a walking path in one’s neighborhood, marking all favorite café shops, parks and bus stations.

NMEA 0183• The National Marine Electronics

Association• A combined electrical and data

specification for communication between marine electronic devices such as echo sounder, sonars, anemometer (wind speed and direction), autopilot, GPS receivers and many other types of instruments

NMEA GGA Message Example• $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47Where:

GGA Global Positioning System Fix Data 123519 Fix taken at 12:35:19 UTC 4807.038,N Latitude 48 deg 07.038' N 01131.000,E Longitude 11 deg 31.000' E 1 Fix quality: 0 = invalid 1 = GPS fix (SPS) 2 = DGPS fix 3 = PPS fix

4 = Real Time Kinematic 5 = Float RTK

6 = estimated (dead reckoning) (2.3 feature) 7 = Manual input mode 8 = Simulation mode

08 Number of satellites being tracked 0.9 Horizontal dilution of position 545.4,M Altitude, Meters, above mean sea level 46.9,M Height of geoid (mean sea level) above WGS84 ellipsoid (empty field) time in seconds since last DGPS update (empty field) DGPS station ID number *47 the checksum data, always begins with *

WPF• Windows Presentation Foundation

(Avalon)• Separation of Appearance and Behavior

– Appearance – XAML– Behavior – programming language

(C#, Visual Basic, etc).• Highly customizable• Resolution independence (logical units)

WPF• XAML:

- Extensible Application Markup Language- Example:

<Button> <Button.Background> <SolidColorBrush Color="Blue"/> </Button.Background> <Button.Foreground> <SolidColorBrush Color="Red"/> </Button.Foreground> <Button.Content> This is a button </Button.Content></Button>

WPF vs. WinForms• WPF:

- More features and possibilities- Non-standard Applications

• Windows Forms:- Simpler- Easier to find Experts

Expression Blend

Databases• Paths are saved in binary files (*.pth), such

that the path’s name is the file’s name.• Markers are saved in a XML document.

<?xml version=”1.0” encoding=”utf-8” ?><Markers> <Marker> <Name>Café Greg</Name> <Latitude>32.7763</Latitude> <Longitude>35.0249</Longitude> <Type>cafe</Type> </Marker> <Marker> <Name>Fishbach Computer Farm</Name> <Latitude>32.777</Latitude> <Longitude>35.0245</Longitude> <Type>computer</Type> </Marker></Markers>

Handling XML Document

+getMarkerNames() : ArrayList+getMarkerDetails() : ArrayList+getGroupDetails() : ArrayList+getGroupNames() : ArrayList+writeMarker() : bool

+iconList-cwd : string

MarkerHandler

+clsValidator() : clsValidator+ValidateXMLFile() : bool+ValidationFailed() : void

-m_sXMLFileName : string-m_sSchemaFileName : string-m_objXmlSchemaCollection-m_bIsFailure : bool

clsValidator

Markers.xml: Markers.xsd:

Google Static Map API• Sending a query with location, map and

feature parameters.http://maps.google.com/maps/api/staticmap?center=Brooklyn+Bridge,New+York,NY&zoom=14&size=512x512&maptype=roadmap&markers=color:blue|label:S|40.702147,-74.015794&markers=color:green|label:G|40.711614,-74.012318&markers=color:red|color:red|label:C|40.718217,-73.998284&sensor=false

• Receiving a response containing a static picture of the requested map.

• Limitation of 2048 characters.• Use Polylines to overcome this limitation –

PolylineCreator Class

Polyline Example• Original list of points:

37.44601,-122.14934|37.44591,-122.14945|37.44582,-122.14956|37.44571,-122.14964|37.44563,-122.14974|37.44555,-122.14984

• After converting to Polyline: qtpcFjhphVRTPTTNNRNR

Put It All Together

clsValidator

binary.pth

Path Select Window

Show Map Window

Record Window

PresentationTier

getPath

Logic Tier PolylineCreator Class

MakeHandlerClass

Validate

Data Tier

read from GPS

reco

rd p

ath writeMarker

getData

createPolyline

MarkersXML

MarkersXSD

save

path Validateread/write

read file

The GUI• Let’s run the program and see for

ourselves!

Thank you for your attention!