managing multiple track segments with dnr garmin
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Managing Multiple Track Segments with DNR Garmin. Objectives. Using DNR Garmin: Download tracks Save track segments to shapefiles. Summary of Topics. Multiple Track Features Scenario Download Tracks Save Polygon Feature as Shapefile Save Line Features as Shapefiles.

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Presentation Transcript
objectives
Objectives

Using DNR Garmin:

Download tracks

Save track segments to shapefiles

summary of topics
Summary of Topics
  • Multiple Track Features Scenario
  • Download Tracks
  • Save Polygon Feature as Shapefile
  • Save Line Features as Shapefiles
data collection scenario
Data Collection Scenario

Collected one polygon feature

Saved Track (needed fire acres)

Collected two line features

Dozer Line

Hand Line

3 Separate Track segments in the Active Track Log

Fire Perimeter

data summary
Data Summary

Have (GPS)

3 track segments

polygon

line

line

1 saved track

polygon

Need (GIS)

1 fire perimeter polygon

1 dozer line

1 hand line

select track download
Select Track Download

Download – transfers a copy of data, does not remove data from receiver

verify Coordinate System

view track data table
View Track Data Table

show/hide data table

scrollbar

scrollbar

resize window

watch download

as text file first
...As Text File First!

A Text File should always be saved First as a back up file to the ESRI (ArcView) Shapefile

Name should indicate all track points

20080319_rxwui_alltrackpts

status window
Status Window

Name: 20080319_rxwui_alltrackpts.txt

as arcview shapefile
...As ArcView Shapefile...

Note points files already there

Projected shapefile uses projected coordinates.

Unprojected shapefile uses WGS84 coordinates.

status window1
Status Window

Name same as text file, extension different

20080319_rxwui_alltrackpts.shp

locate shapefile
Locate Shapefile

Note file path

Note additional files

select first track segment
Select First Track Segment

First segment is fire perimeter

Second segment is dozer line

Third segment is

hand line

Select the first Active Log track segment

light blue-start of new track segment

as text file first1
...As Text File First!

A Text File should always be saved First

as a back up file to the ESRI (ArcView) Shapefile

Name should indicate feature type

20080319_rxwui_perim.txt

as arcview shapefile1
...As ArcView Shapefile...

Note all track points file already there

Name should indicate feature and shape type 20080319_rxwui_perim_pts.shp

as a point1
...As a Point

- Save to a Point Shape to ensure integrity

- Save to a Polygon ONLY if you are sure your data is perfect

save again to arcview shapefile
...Save Again to ArcView Shapefile...

Note all track points file and perimeter points listed

Name should indicate feature and shape type 20080319_rxwui_perim_poly.shp

check saved files
Check Saved Files

Text file of all Active Log track points

Point shapefile of all Active Log track points

Point shapefile of fire perimeter track points

Text file of fire perimeter track points

Polygon shapefile of fire perimeter

let s peek at your work
Let’s Peek at your Work!

Give both shapefiles to GIS Specialist

Great!

Point Shapefile: 20080319_rxwui_perim_pts.shp

Polygon Shapefile: 20080319_rxwui_perim_poly.shp

select second track segment
Select Second Track Segment

First segment is fire perimeter

Second segment is dozer line

Third segment is

hand line

light blue - start of new track segment

as text file first2
...As Text File First!

A Text File should always be saved First

as a back up file to the ESRI (ArcView) Shapefile

Name should indicate feature type

20080319_rxwui_dzline

as arcview shapefile2
...As ArcView Shapefile...

Note other shapefiles

Name should indicate feature type 20080319_rxwui_dzline.shp

as a point or a line
...As a Point or a Line???

Point Shape ensures integrity

You can save to a Line ONLY if you are sure your data is perfect

check saved files1
Check Saved Files

Text file of Dozer Line

Shapefile of Dozer Line

select third track segment
Select Third Track Segment

First segment is fire perimeter

Second segment is dozer line

Third segment is

hand line

last segment in table

as text file first3
...As Text File First!

A Text File should always be saved First

as a back up file to the ESRI (ArcView) Shapefile

Name should indicate feature type

20080319_rxwui_handline

as arcview shapefile3
...As ArcView Shapefile...

Note other saved shapefiles

Name should indicate feature type 20080319_rxwui_handline.shp

as a point or a line1
...As a Point or a Line???

- Point Shape ensures integrity

- Save to a Line ONLY if you are sure your data is perfect

check saved files2
Check Saved Files

Text file of Hand Line

Shapefile of Hand Line

review of topics
Review of Topics
  • Multiple Track Features Scenario
  • Download Tracks
  • Save Polygon Feature as Shapefile
  • Save Line Features as Shapefile
final data review question
Final Data Review & Question

GPS

3 track segments

polygon

line

line

1 saved track

polygon

GIS

1 fire perimeter polygon

1 dozer line

1 hand line

All GIS shapefiles came from Active Track

Why didn’t we use Saved Perimeter Track?

compare geometry
Compare Geometry

Active Track Log

Saved Track

Which would be a better representation on a map?

compare area calculations
Compare Area Calculations

Active Track Acres Calculated in ArcGIS

Saved Track Acres Calculated in GPS

Saved Track –

Good estimated Acres!

review of topics1
Review of Topics
  • Multiple Track Features Scenario
  • Download Tracks
  • Save Polygon Feature as Shapefile
  • Save Line Features as Shapefiles
conclusions
Conclusions

Active Track Log

  • Actual GPS positions
  • Good depiction of features

Saved Track

  • Saves “critical” GPS positions only
  • Creates linear shapes for curved features
  • Good approximate acre calculation
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