GPS helpfile for when GPS downloads don\'t work correctly

1.  If processing worked correctly without errors, but when exporting if
    it \'leaves out\' a few features or gives a message about \'1
    feature having no positions\', then here\'s one thing to check:

> Look at the max pdop on that feature using the Data/Position
> Properties menu under the DOP tab. Then in your export window look
> under options and position filters and see what your max pdop filter
> is set at - make sure its higher!

2.  To check what actual locations make up a feature (i.e. to see all
    the positions that have been averaged to produce the final feature)
    here's what to do:

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a.  make a backup copy of the .ssf file

b.  open the .ssf file and view the map

c.  highlight the feature of interest

d.  Under data on the menu open feature properties and position
    properties

e.  Under feature properties, hit delete (scary -- make sure you have a
    backup copy)

f.  If you can't see the points that make up the feature at this point,
    then try going to View, Layers, Features and make sure "Not in
    Feature" is checked on, then goto 'line style' and increase the
    thickness. Now you should be able to see the points.

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3.  When you can see the individual points, there is a way to delete
    some outlier positions then regroup the points into a new feature.
    Details to follow when I figure that out...

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4.  Couple other things that could happen in the field that could cause
    'missing data':

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a.  turning the unit off with an open data file. Always be sure that the
    feature and the rover file are closed before turning off.

b.  Leaving pause on -- don't do that

c.  Poor PDOP -- unit will beep, but \# of points will not be
    increasing.

d.  Not sure...

5\. Want to see PDOP on a Geo3? Goto the satelite screen under SYS and
hit OPTION and then pick advanced and you will see a text screen for
satelites and at the bottom you'll see the numeric PDOP.

6.  Want to nest points while doing a line? (i.e. while GPS'ing a trail
    put in a point along the way). Just close the trail, open the point
    feature -- do it then close it. Then hit OPTION and it should have
    an option to CONTINUE the trail line feature.

7.  Want to stop a trail segment and then change an attribute (like
    width or surface type), then just hit pause, then OPTION and pick
    segment and it will create a new segment but it will be connected to
    the last and will pull up all the attribs as defauts. Be sure to
    take pause back off.

8.  Cold Boot for TSC1 if not working right:

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a.  turn unit off

b.  hold down F5 and Fn then press the power key. Hold F5 and Fn until
    you get a message about reformatting (this will delete all files on
    the unit)

**[Questions for Compass Com ?????]{.underline}**

Dan from compasscom visited on 9/25/01

Converting way points into shapefiles

Yes -- can be done.

1.  open waypoint file

2.  open a [copy]{.underline} of a data file that has the resinv data
    dict

3.  delete all features (use the little eraser and draw a window around
    them)

4.  goto Data on the menu and then to the Create Feature option

5.  choose monuments

6.  make sure pick from screen is checked

7.  pick a waypoint on the screen -- it will turn it into a point
    feature

8.  once all are picked you can save the data file and then export as a
    shapefile

Viewing way point coordinates within ProXrs?

Forgot to ask

Uploading shapefiles into units?

Will take a little while to go into this - tough

Cigarette charger for ProXrs?

Not exactly. You can't plug into TSC1 directly, but you can plug into
the whole ProXR. With everything hooked up, you can plug a cigarette
plug extension into the proXR. Then on the TSC1 you need to turn it on
and then go into the Config menu and choose, low voltage charge. Set
that to Y. Let it charge up, but when you're done, BE SURE TO TURN THE
LOW VOLTAGE CHARGE BACK TO NO. If you don't do this and go to use the
unit in the field, then you are screwed -- it will draw down the
batteries really quickly.

Cold weather use suggestions

Sleep with the unit. Just learn the quick keys for darkening the screen.

Wet weather suggestions

Only water resistant, not water proof. Put in plastic baggie.

Carrier Phase settings 10 min. vs 45 min.

For Carrier phase use your setting for length of time should depend on
how far away your base station is. Roughly one min per mile. So 10 min
setting is OK for 10 miles. Really you can do worse than that and it
might still be OK (10 mins for 30 miles) but only within reason. You
don't need a new rover file for each point, just need an uninterrupted
connection with satelites for whole time (don't actually have to be
actively taking points that whole time, unit just needs to be on and
receiving satelite data).

Reprojection question -- seems like it was using NAD83 HPGN colorado
when it was set to NAD83 (CONUS). How do we know what its using.

Goto Options, Other then you can view or even edit the transformations
there.

Problems with PF 2.8 -- with the MSL option.

Known bug -- download patches.

Old GPS unit -- Dan will look into exchanging for us to get something
useful as a tradein credit.