Little Dipper - Dip and Strike
To measure the dip and strike of a geological outcrop, place the phone on
the rock face with the top of the phone pointing toward the direction of
greatest dip downwards.
Press the button labeled 'record the dip', and the readings will appear in
the white box.
Tap the yellow button 'tap here to send' and an email will be set to your
preset email account.
The email will include the time and location, along with the reading of
dip, the alignment of the dip, and the angle of strike (which is
perpendicular to the dip angle). By convention called the Right Hand Rule,
strike is defined as 90 degrees clockwise from the downslope dip
direction.
By clicking the blue link in the received email, a Google Maps
screen
will appear. Your location should be highlighted with a green icon. A
confusing red icon may also show at the nearest point for which Google has
an address.
The compass bearings of dip alignment and strike are in relation to True
North.
The dip angle should always show up as a negative value, if the top front
of the phone is aligned toward the lowest point and steepest slope of the
outcrop which you are measuring. Imagine the direction water would flow
down the surface, when you are setting the dip alignment.
Before the Dip/Strike email feature will function, you must preset your
recipient email. To do so, follow the 'setup' button from the bottom of
the Dip/Strike page to a screen with an input box to enter your email.
Click the middle button to save it, after you are sure you entered it
correctly. You can then double-check that it is stored properly by
clicking the lower button on the input page, above the tartan image.
Setting your email need only be done once, not every time you use the app.
The email can be changed later, if desired.
Before the GPS location will function, the Location setting of the phone
must be set to Satellite. It may take several minutes till the satellite
connection is established properly and you must wait.
The updated app has a new feature reached by clicking the compass icon at
the upper left. This shows a True North compass, and the pitch and yaw in
real-time. A button on the page shows current elevation. The Flashlight
button opens a bright white page for finding keys, etc. This works best if
the phone brightness is set to maximum.
The Satellite feature works only outdoors, and prefers a clear view of the
sky.
You can check whether the phone has a satisfactory GPS signal by starting
Google Maps first, and checking if your current location appears on the
Maps screen as a blue triangle.
The Use Satellite Location setting should be turned off after you are
finished using the app to conserve battery power.
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