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GPS with Farm Site Mate. CE handheld Trimble GPS receiver Farm Site Mate software. GPS in the field. GPS antenna. Paper Map with targets. GPS receiver and batteries. Sample Location.

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GPS with Farm Site Mate

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Gps with farm site mate l.jpg

GPS with Farm Site Mate

  • CE handheld

  • Trimble GPS receiver

  • Farm Site Mate software

Gps in the field l.jpg

GPS in the field.

GPS antenna

Paper Map

with targets

GPS receiver

and batteries

Sample Location

Matt Evans of Abe591a and Aaron Pierce of the Biology Department; mapping the Purdue University Ross Reserve.

Windows CE handheld computer

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Trimble AgGPS 132

Turn on GPS by attaching batteries. Nothing else is needed.

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CASIO pocketPC

Attach the cable to the

bottom of the Casio.

Then turn it on by

depressing the small “power”

button on the left side.

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Farm SiteMate

Click under the windows icon to start SiteMate. Click once on the splash screen. Then click “open scouting” and say “new”

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Scouting Log

Create a new log file. This will be the record of your session today

Enter your initials as a file name. Brief, no spaces;

Select “Blank template” and click the small round “OK” button.

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Add an attribute.

The new scouting log file opens and asks if you want to add an attribute. You do.

It asks if the attribute will be text or numerical. I suggest text but its not really important today.

Click “OK” again to return to the map view.

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Taking points or lines

Select boundry or points. You will use both at some point.

Then click on “go” to begin.

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Our aerial photos were taken when the building next door was under construction.

We need to find the area now planted in grass in front of the new building.


Slide10 l.jpg

Red line is Nick following the sidewalk.

The big jump towards AGAD never really happened.

That is caused by bounce from nearby buildings and trees.

This software gives you no warning.




Use points for the 3 hydrants and the callbox and boundary for the grass area.

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Here Nick is walking around the fireplug, his path is drawn in blue.

At the same time Monica, using another GPS is standing next to the fireplug (drawn as purple dot.) Notice the discrepancy. Nick’s blue line should circle the purple dot. Why are the units not agreeing?

Fire Plug

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These represent locations

collected by a differential GPS antenna on our roof. In 24 hours the points scatter around a 4.0 meter circle. In Tippecanoe county a second of a degree is about 30 meters.

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After mapping, to download…

  • When you are done, click “file=>export log” and select shapefile output. This translates your data into 2 shapefiles.

  • Exit SiteMate from File=>exit.

  • Plug the pocketPC into a cradle, and when the ActiveSynch window appears, use explore to move your shapefiles.

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Plugged in

If you get this window, click “no” to partnership.

Activesynch l.jpg


When ActiveSynch appears, click on explore to see your stored files. Look in Personal.

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Drag and drop

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Assignment: Rectify

  • Download themes

  • Upload GPS and project (State Plane IN west feet)

  • Rectify image to the state plane layers

  • Create map and index as usual.

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This photo has been scanned,

with no coordinate system.

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Locate the grass circle

And the fireplugs

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Bring in the other existing layers

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Register photo to the ground control.

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Find some ground control.

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Nothing is saved until you select “rectify.”

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