# Presentation: 683929

## Garmin GPS III Plus DataCollection

## Objectives

_**Collect:**_
**- Waypoints**
**Average Position Waypoints**
**Reference Waypoints**
**- Multiple Tracks in One Track Log**

## Summary of Topics

**Simulator**
**Mark Waypoint**
**Average Position Waypoint**
**Reference Waypoint**
**Tracks **

## Display Simulator Page* 

**Practice data collection indoors**

*****

**Notes:**
See page 76 of Garmin GPS III Plus Manual.

## Turn Simulator Onand Set Speed

**Turn Simulator On****and Set Speed**

## Verify Simulator Working

**Notes:**
EPE:  Estimated Position Error, + or – 49 feet, horizontal positional error, 95% confidence level
DOP:  Dilution of Precision, estimated to be = HDOP, 95% confidence level
Polar Plot shows location of satellites by PRN # (Pseudo Random Noise Number)
Bar graph identifies satellites by PRN # that the receiver can pick up and the strength of the signal

## Collect  “Mark”  Waypoint 

**-All values frozen**
**-No values stored yet **

**Press and hold Enter**

**Notes:**
Note:  there are 5 ways to store waypoints:
 Text Entry (manual) – 
	(a) manually enter position coordinates (see page 48 of Garmin GPS III Plus Manual)
	(b) manually enter bearing and distance to a “Referenced” waypoint (see page 48 of Garmin GPS III Plus Manual)
(2) Mark Present Position – Press and hold “Enter” button for present position (see page 47 of Garmin GPS III Plus Manual)
(3) Average Position -  average of 2 or more positions (see page 31 of Garmin GPS III Plus Manual)
(4) On Map – use rocker keypad to move arrow to desired position, press “Enter” button (see page 48 of Garmin GPS III Plus Manual)
(5) Nearest Location – select one of the already stored cities to be saved as a waypoint (see page 53 of Garmin GPS III Plus Manual)

## Modify Mark Waypoint Screen

**Modify Mark Waypoint Screen**

**Used for “Offset”**

**Current position **

**DO NOT EDIT-needed for ArcView **

**Waypoint Symbol **

**Waypoint Name, max 6 characters **

## Change Waypoint Symbol

**Change Waypoint Symbol**

**Use Rocker Keypad **

**Highlight Waypoint Symbol **

**Press Enter **

## Change Waypoint Name

**Change Waypoint Name**

**Highlight Waypoint Name **

**Use Rocker Keypad **

**Press Enter **

## Store Mark Waypoint 

**Store Mark Waypoint **

**Highlight “Done” **

**Use Rocker Keypad **

**Press Enter **

## Verify Stored Waypoint 

## Collect Average Position -Start with Mark Waypoint

**Collect Average Position -****Start with Mark Waypoint**

**This will be name of Average Position when stored **

**Note initial position coordinates **

**Notes:**
Also can start with Position Page, press Menu, select Average Position.  Upon saving Average Position is stored in the next available Waypoint number.   

## Select Average Position

## Open Average Position Page

**Open Average Position Page**

**Press**
**Enter**

**Note Estimated Accuracy and Measurement Count**

**Notes:**
Estimated Accuracy appears to be a conservative estimate, horizontal, 95% confidence level.  

## Save Average Position

**Save Average Position**

**When Estimated Accuracy and Measurement Count are acceptable press “Save”**

## View Stored Average Position

**1 position **

**32 positions **

**No indication this is an Average Position**

## Create Reference  Waypoint -  Offset from Existing Waypoint

**Create Reference  Waypoint -  Offset from Existing Waypoint**

**Use where:**
**GPS signals are blocked **
**- location is inaccessible **

## Start with NewMark Waypoint

**Note initial position coordinates **

## Modify Fields

**Modify Fields**

**Name of Reference Waypoint when stored **

**Note final position coordinates **

**Enter bearing and distance **_**from existing waypoint to reference waypoint**_** **

**Select from existing waypoints**

## View Waypoints on Map Page

**Note:  to view waypoints on Map Page match scale on Map Page to scale in Map Setup/Pnts/Zoom**

## Create Reference  Waypoint -  Offset from Current Position

**Create Reference  Waypoint -  Offset from Current Position**

**Use where:**
**GPS signals are blocked **
**- location is inaccessible **

## Start with NewMark Waypoint

**Start with New****Mark Waypoint**

**Note initial position coordinates  = current location**

**Notes:**
Also can start with Position Page, press Menu, select Average Position.  Upon saving Average Position is stored in the next available Waypoint number.   

## Modify Fields

**Modify Fields**

**Name of Reference Waypoint when stored **

**Note final position coordinates **

**Enter distance then bearing **_**from current location to reference waypoint**_** **

**Using initial position coordinates**

## View Waypoints on Map Page

**Note:  to view waypoints on Map Page match scale on Map Page to scale in Map Setup/Pnts/Zoom**

**Reference Waypoint**

**Current location or initial position coordinates**

## Caution!

**If arrow present, then waypoint collected will be a Map Waypoint, not a GPS- calculated waypoint**

## Open Track Logs Page

**Open Track Logs Page**

**Press Enter**

**Notes:**
See page 71 of Garmin GPS III Plus Manual for Review of Track Log Settings.

## Display “Track Log Options” 

**Display ****“Track Log Options” **

**Press**
**Menu**

## Display “Setup Logging”

**Press**
**Enter**

## Start 1st Track Collection by Setting Record Mode to “Fill”

**Highlight Field**

**Highlight Field**

**Press Enter **

**Press Enter **

## Stop 1st Track Collection by Setting Record Mode to “Off”

**Stop 1****st**** Track Collection by Setting Record Mode to “Off”**

**Highlight Field**

**Highlight Field**

**Press Enter **

**Press Enter **

## Check Memory

**Press Quit **

## DO NOT CHOOSE “Save Active Log”

**This option saves:**
**	****- only most significant  positions**
** ****	****- maximum 250 positions**

## Start 2nd Track Collection by Setting Record Mode to “Fill”

**Highlight Field**

**Highlight Field**

**Press Enter **

**Press Enter **

## Stop 2nd Track Collection by Setting Record Mode to “Off”

**Stop 2****nd**** Track Collection by Setting Record Mode to “Off”**

**Highlight Field**

**Highlight Field**

**Press Enter **

**Press Enter **

## View Track Logs on Map Page

**View Track Logs on Map Page**

**1****st**** Track  **

**2nd Track  **

## Check Memory After Collecting 2nd Track

**Note memory used increase as additional tracks are collected **

## Summary of Topics

**Simulator**
**Mark Waypoint**
**Average Position Waypoint**
**Reference Waypoint**
**Tracks **

## Slide 39

## Setup Logging – Record Mode

**Setup Logging – Record Mode**

**Ends collection**
**Collects until filled**
**Collects until “Off”**
**     ****selected, will**
**     ****overwrite **

## Setup Logging - Time

**Max:  1900 track log positions for Active Log**
**Approximate collection time:**
**	****1 second Interval Value – 30 min**
**	****2 second Interval Value – 60 min **
**	****5 second Interval Value – 2.5 hours**

**Position collected automatically based on a time interval**

## Setup Logging - Resolution

**Setup Logging - Resolution**

**Position collected automatically  based on deviation to the left or right  **

**Interval Value:   **
**	****-When deviation to the right or left exceeds this value a track point will be collected **
**	****-Units either meters or  feet **

## 1 Vs. 5 Second Interval DataMap View

**1 sec**
**interval**

**5 sec**
**interval**

## 1 Vs. 5 Second Interval Data

**1 second    ****	****interval**

**5 second ****	****interval**