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Project IIa Project IIa GPS GPS Jeff Houston Jeff Houston Jeff Filson Jeff Filson Tim Culbreth Tim Culbreth Jennifer Martin Jennifer Martin
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Project IIa

Jan 27, 2016

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Project IIa. GPS Jeff Houston Jeff Filson Tim Culbreth Jennifer Martin. Project Deux: In this project you will:. Learn how GPS works Learn how to use a handheld GPS unit Locate places using GPS Enter locations into the GPS device Import GPS data into ArcView Create a map with GPS data - PowerPoint PPT Presentation
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Page 1: Project IIa

Project IIaProject IIa

GPSGPSJeff HoustonJeff HoustonJeff FilsonJeff Filson

Tim CulbrethTim CulbrethJennifer MartinJennifer Martin

Page 2: Project IIa

Project Deux:Project Deux:In this project you will:In this project you will:

• Learn how GPS works

• Learn how to use a handheld GPS unit

• Locate places using GPS

• Enter locations into the GPS device

• Import GPS data into ArcView

• Create a map with GPS data

• Experience fun

Page 3: Project IIa

How GPS WorksHow GPS Works

• 24 US GPS Satellites

• Broadcast precise time signals

• GPS receiver compares received time signals with actual time to determine distance from satellite

• 3 satellites need to triangulate a 2D position, 4 or more to get a 3D position (altitude).

Garmin, 2006

Page 4: Project IIa

Other Information the GPS Unit can Other Information the GPS Unit can calculate:calculate:

• Speed

• Direction

• Sunrise, sunset times

• Track a path

• Distance traveled

• Distance and direction to set waypoints

Page 5: Project IIa

WaypointsWaypoints

• Waypoints are set by the user manually, entering long. and lat. or importing from a database or entering by marking a location in the field.

• Can be use to set paths or find locations.

• This GPS unit can hold up to 500 waypoints with specific names and/or symbols.

Page 6: Project IIa

404: LOCATION NOT FOUND404: LOCATION NOT FOUNDSources of errorSources of error

• Atmospheric disturbances

• Reflection off of objects (trees, buildings, etc…)

• Clock errors

• Errors in a satellite’s orbit

• Too few satellites

• Satellites at bad angles (ex: too close together)

Page 7: Project IIa

More informationMore information

• For more information on how GPS works, check out these sites:

• http://www.garmin.com/aboutGPS/

• http://www.gps.gov/

• http://www.howstuffworks.com/gps.htm

Page 8: Project IIa

Using The Hand UnitUsing The Hand Unit

GPS in the FieldGPS in the Field

Page 9: Project IIa

Getting StartedGetting Started

• Press the “ON” button, it has an image of a red light bulb.

• Let it get a satellite signal (need to be outside)

• Press “Quit” once to bring up the main menu

• Press “Enter” on the waypoint menu option

Page 10: Project IIa

Changing Lat/Long DisplayChanging Lat/Long Display

• If your coordinates are in a non-decimal format go to the “Main Menu” screen by pressing the “Page” button.

• Go into the “Setup Menu”, go into “Navigation”• Highlight “Position Frmt” press “Enter” to select it

and scroll through the options until you land on “hddd.ddddd” select this so all your coordinates will be set to decimal format.

Page 11: Project IIa

Entering Mystery WaypointEntering Mystery Waypoint

• Press “Up” Press “Enter”• Scroll through letters with the arrow pad to

make the name “Point 1”• Press “Down” twice to highlight

coordinates, Press “Enter” and use arrow keys to scroll through numbers and enter your desired coordinates.

• Once your coordinates are entered press “Done”

Page 12: Project IIa

Finding Mystery WaypointFinding Mystery Waypoint

• Press “Quit” button twice to arrive at the map.

• Highlight the upper left corner with the map size on it using the side arrow. Press “Enter” to increase size of map use “Up Arrow.”

• Highlight point “P” and start walking toward your waypoint.

Page 13: Project IIa

Making Your WaypointsMaking Your Waypoints

• Pick 4 locations on campus, go to those locations

• Press “Mark” button

• Highlight the “Waypoint” (actually a number until you name it). Press “Enter” and enter a name for your waypoint by scrolling through the letters.

• Press “Enter” and Save (bottom of screen)

Page 14: Project IIa

GEOG 121 Project 2b: GEOG 121 Project 2b:

Integrating GPS and GISIntegrating GPS and GIS

Page 15: Project IIa

Review of GISReview of GIS

• Part B of this project requires you to put together both data from the GPS and the GIS to make a usable map product

• Recall that GIS, or Geographic Information Systems, is a decision making tool used to make geographical data into geographic information

Page 16: Project IIa

Step 1: Downloading GPS Points Step 1: Downloading GPS Points with Waypointwith Waypoint

• To start, plug your GPS unit into the back of your computer

• Open Waypoint under All Programs and Geog 121

• Go to GPS tab and download from GPS and then to Waypoint

Page 17: Project IIa

Step 2: Formatting PointsStep 2: Formatting Points

• Next you need to specify the coordinate system and datum

• This is important because without a coordinate system and datum specified, the GIS software can’t re-project the points correctly from the GPS– To specify the coordinate system go to Configure, and

click on Decimal Degrees and Meters– To specify the datum go to File, Datum and click on

WGS84

• Then save the file by going to File, Save

Page 18: Project IIa

Step 3: Using ExcelStep 3: Using Excel

• Open Excel, click file open and select the Waypoint text file• Select delimited and click next• Set delimiters as only comma and click finish• Reformat the newly opened file into 3 columns: Waypoint, Latitude,

and Longitude as shown below• Save as a text file

Page 19: Project IIa

Step 4: ArcView 9.1Step 4: ArcView 9.1

• Download map of campus from Angel– Note that it’s a zip file, and will need to be extracted

• Open ArcMap, go to File, add data. Look under Campus Shapefiles and open campus_spc_nad83.lyr

• Next you have to manually re-link all the layers– Right click psu_bldg, go to properties, click source

tab, set data source button. Find psu_bldg.shp and add

– Repeat for next two layers

Page 20: Project IIa

Step 5: Re-project MapStep 5: Re-project Map

• The Campus Map was created using State Plane Coordinate System 1983. But this needs be re-projected to WGS 1984 so that it matches the GPS data

• Right click on layers, go to properties, click on coordinate system tab

• Go to Predefined, Geographic coordinate systems, world, WGS 1984.

Page 21: Project IIa

Step 6: Importing GPS dataStep 6: Importing GPS data

• Go to tools, add XY data. Click on browse button and find the saved waypoint text file

• Set X field as longitude and Y field as latitude

• Click edit to set coordinate system, select, geographic coordinate systems, world, WGS84

Page 22: Project IIa

Step 7: Saving Map ImageStep 7: Saving Map Image

• Go to file, export map, save file as a jpeg, set resolution to 72. Click Save. The END…..

Page 23: Project IIa

CitationsCitations

• http://www.garmin.com/aboutGPS/• DiBlase, David; Understanding Geographic Data, ESRI Virtual Campus Module 1:

What Are Geographic Data?, 2006. http://training.esri.com/ Accessed Oct 12