This blog is about teaching, instructing and sharing practical applications to navigation, GPS technology and survival in the backcountry.
Map, Compass & GPS
Friday, March 31, 2017
Finding Remains in the Field
At a recent Search and Rescue (SAR) conference I sat through an excellent presentation by the state of Oregon's medical examiner.
She offered her suggestions regarding the discovery of human remains in the field.
First, don't move the remains or other items such as clothing, shoes and other personal effects. You may have found a crime scene.
Second, take a picture of the bone that is found. A cell phone camera is fine. Put a reference to determine size for the examiner. For example, a ruler works best but the sole of your boot or a knife would help too.
Use your GPS to record the geographic coordinates of the scene.
Consider marking the location with flagging tape.
Contact and forward the image to the local law enforcement authorities.
The image below says it well.
Wednesday, March 29, 2017
Handrails
In a previous post I discussed the concept of terrain association. Terrain association is
the process of visually confirming
a map to land features.
A subset of
terrain association is the use of handrails.
Handrails are linear features found on a map and visually correlated to observed
land features. In a building, a
stairway’s handrail provides direction for a walkers travel down to another
level.
Examples of handrails
include roads, rivers, trails and railroad beds. Handrails can be particularly useful when
they run parallel to ones’ direction of travel.
Highway 126
and Cache Creek are distinct linear features that could serve as a handrail.
In the map
above notice that the red direction of travel line parallels Highway 126.
In this example Highway 126 could also be a
backstop to alert the hiker that crossing the roadway would take them in the
wrong direction.
Be alert for
a handrail’s change of direction. There
may be prominent land features that will alert the backcountry traveler to such
a change. A butte or building might be
adjacent or near to a change in direction.
Labels:
GPS,
Land Navigation,
magnetic compass,
outdoors
Monday, March 27, 2017
Fire and Ice: How To Prepare for Climbing Mount Rainier
Lee Flynn has a new post for us:
Fire
and Ice: How To Prepare for Climbing Mount Rainier
Mount Rainier is one of the most iconic
peaks in the United States. Rising 14,410 feet above sea level, this active
volcano combines breathtaking beauty with unpredictable and occasionally
life-threatening hazards. Summiting this unique mountain is an exhilarating and
unforgettable experience, but it does take some special preparation.
Focus
on Fitness
To reach Mount Rainier's summit, expect
to climb a minimum of 9,000 feet in elevation while carrying at least 35 pounds
of gear. The extensive glaciation means that it's not a simple hike, either.
You may have to use your hands to hoist yourself up or rely on crampons and
other tools that may change the way you move. Start training early and focus on
a general fitness plan that works all your major muscle groups. Include both
short-term, intense cardiovascular exercises and endurance training.
Learn
the Skills
Mount Rainier's extensive glaciation
means that snow and ice stick around all year, as do the hazards that accompany
them. Make sure to practice climbing in those conditions. Avalanches are less
common during the climbing season, which lasts from April to September, but
they remain a risk all year. Learn to recognize and avoid avalanche-prone
areas. Make sure you know ice climbing skills, such as how to self-arrest with
an ice ax. Get basic training in first aid and rescue techniques so you can
handle any problems that may arise and choose a route appropriate to your skill
level.
Pick
Your Partners
No solo climbers are allowed on Mount
Rainier, and the National Parks Service recommends at least three to four people per party. First-time or
less experienced climbers typically have the best chance of summiting when they
hire a professional guide. If you create your own expedition, try to choose
teammates whose skills balance each other out. The most experienced mountaineer
should generally be the team leader.
Know
the Risks
Volcanic activity and glaciation create
unusual risks that aren't found on many fourteeners in the United States. In
addition to avalanche risk areas, learn to recognize unstable seracs, or ice
cliffs, which can collapse and fall on climbers. Lower on the mountain,
volcanic activity sometimes causes lahars, or debris flows, which can clog
rivers and cause sudden and unexpected flooding. Mount Rainier also has
notoriously unpredictable weather compared to many other mountains. Make sure
to check weather reports and carry the right equipment to handle any likely
weather conditions.
Test
Your Gear
Never take unfamiliar gear on a major
climb. Giving everything a trial run or two not only lets you identify any
defective or ill-fitting equipment, but it also ensures that you know how to
operate or assemble things. This can come in handy if you have to set up in the
dark or in inclement weather. Make sure to try out any new technological
equipment, too, such as testing solar chargers or familiarizing yourself with a
vape box
mod if you plan to use one on your climb.
Planning
Is Everything
A detailed plan is the key to a
successful summit. Make sure to create a realistic timeline for your climb.
Tailor it to the slowest member of your team so no one feels rushed or
exhausted. Plan around typical weather conditions as well. Climbing on glaciers
during the afternoon can be grueling and unpleasant due to the warmth and the sun
reflecting off of the snow. Most experienced climbers leave extremely early in
the morning to maximize travel time while minimizing sun exposure. Stick to
your plan no matter what to avoid getting stuck on the mountain in dangerous
conditions. Remember that reaching the summit is only half of the journey, so
don't spend too much time relaxing or celebrating before turning around to hike
back down.
Mount Rainier's unique geology and
environment combine to create an exceptional climbing experience, but reaching
the summit can be dangerous. Planning, training and preparation are the keys to
a fun and successful climb.
Tuesday, March 7, 2017
The Changing Scene of Backpacking
One of the most popular things for young
people to do today is to spend some time backpacking around the world. There
are many benefits to having a backpacking adventure. Young people learn more
about the wider world when they travel beyond their borders. They come back
from their experiences more educated, more tolerant and respectful of other
cultures, more flexible and better able to solve problems. Backpacking has been
around since the 1950s when backpackers first started travelling the famous
Marco Polo Silk Route. That evolved into the Hippie Trail from
Europe to Asia in the 1960s, and backpackers have spread around the world since
then. Here is a look at the ways backpacking has changed over the years.
The People
Perhaps the biggest way that backpacking
has changed over the years is the types of people that go backpacking. When
backpacking was in its infancy, it was only hippies and adventurers who would
be bold enough to travel the world with nothing more than a backpack on their
shoulders. Nowadays, all kinds of people go backpacking. It is not just the
young people who are highly adventurous. Now that there are many more resources
available for backpackers, people do not need to be as fearless and willing to
blaze their own trails as they had to be by necessity in the past. People today
can use Internet resources to plan every single detail of their trips. In the
past, travelers often had to fly by the seat of their pants when they arrived
at a new destination.
The Equipment
Another huge change in backpacking over
the decades has been the updated technology. The main way that technology has
changed backpacking is by making everything smaller and lighter. Backpackers today
can fit a lot more gear in their packs than they could even 20 years ago.
Clothing, shoes, tents and most other gear has both become lighter and smaller.
It has also become easier to pack by stowing up into smaller spaces. Instead of
packing cartons of cigarettes, backpackers can use e-cigarettes and pack a vape
starter kit to save space.
Of course, the abundance of electronic
gear is one of the biggest innovations in backpacking. With one smartphone, travelers can document their trip
with photos and videos, keep in contact with the folks back home through email
and video chat, translate a foreign language, call for a taxi, research their
next destination and navigate their way through unfamiliar territory with GPS
guidance. Smartphones have made travelling much easier than ever before, but
they also take out some of the sense of adventure in backpacking.
The Destinations
When the backpackers started spreading
out around the world in the 1970s, towns where they spent a lot of time started
rapidly evolving. Quiet fishing villages and sleepy mountain towns started
sprouting many hostels, restaurants and nightclubs aimed at the backpacking
crowd. Backpackers started to fall in love with many of these destinations,
putting down roots and opening up businesses of their own.
The result of this is that there are many
stops along the popular backpacking routes where travelers can eat Western food
and speak in English without ever having to immerse themselves in the local
culture. This makes it much more convenient to be a backpacker, which is one of
the reasons so many more people are backpacking these days. It also means that
something is lost because many backpackers do not gain the cultural enrichment
that was once inevitable for backpackers.
As you can see, the world of backpacking
has changed a lot over the decades. The people, places and gear may have
changed, but the experience is still essentially the same. It is still all
about people expanding their worlds to learn about other cultures. Although
they may not get the same wild experience that was possible in the past, it is
still a good way for people to expand their horizons and learn about the world.
Sunday, March 5, 2017
Terrain Association
“A
good view will help to form a picture of the shape, the patterns and grain of
the land itself. High ground will tell a
story of the geological formations and erosion.”
The Natural Navigator by Tristan Gooley
Terrain association is a key step in land
navigation. While the topographic (topo)
map identifies terrain features through the use of contour lines, colors and
symbols, terrain association is a process of confirmation of map to land
features.
In the field, the key first step in terrain association
is to orient the map. Orienting a map is a
starting point to identify where I am, where I want to go and where I have
been. When oriented, map north will
match geographic north on the ground. For information on how to orient
a map read my supporting post.
I orient my topo
before I leave the trail head and at regular intervals during a hike.
A key component of terrain association will be the evaluation
of the information provided by the contour lines. Contour lines identify five key terrain
features that include hilltops, valleys, ridges, depressions and saddles.
“Match
the terrain to the map by examining terrain features.”
US Army Field Manual FM 21-26 Map Reading and Land Navigation
Gain a clear view of the land in the immediate area before
comparing map to ground features. If needed
get an elevated view of the surroundings.
While looking at the map, I break down the terrain and
lay of the land into two components that I refer to as pathways and boundaries.
Pathways make up my route
through the backcountry. Pathways are
trails, old “jeep roads,” government roads (e.g., Forest Service and Bureau of
Land Management gravel and unimproved roads.)
Not all trails and roads are pathways.
In an area lacking trails and roads, an open area clear of significant
vegetation may be a pathway. Similarly,
a valley or ridgeline might be a pathway too.
Importantly, the pathway will be in the direction of desired travel. Finally, the hiker needs to ensure the
pathway is safe and he is physically up to the task.
Trail guide books are an
excellent source for finding a pathway.
Many of the newer publications offer coordinates for the GPS receiver,
map views and a description of the recommended route.
Boundaries are major land features that help guide the
hiker along his path too. They are
features that provide containment and may prevent the hiker from going far off
track. Boundaries can be rivers, streams,
rail road beds, roads and large features such as a mountain range or ridge
line. Boundaries keep the hiker within
the route of travel. For example, if a stream
is crossed then perhaps the boundary has been violated.
Figure 1 In the image above the blue line
is the pathway with the borders and boundaries in red.
In the image above the blue line mirrors an existing
trail and is a pathway. The two red
lines border steep terrain and are the boundaries for this hike.
Start the terrain association process at home. By reviewing the route on the kitchen table
one begins to develop a mental map. Maps
reviewed with trail guides and conversations with those knowledgeable of the
area improve the hiker’s familiarization of the backcountry pathway; this is
the detail that improves and supports navigation. The refined mental map aids in the
correlation process while in the field.
Practice and frequent review makes the task of terrain
association simpler over time. Involve
children in the process too. They will
be your future navigators.
Friday, March 3, 2017
Free Maps for Your GPS
Visit www.GPSfiledepot.com.
Thursday, March 2, 2017
GPS Setup - Using the Right Coordinates
A good friend has
given you the coordinates to his favorite fishing spot at Elk Lake. He was genuinely excited and pleased to give
you this treasured location. Now you can
enter this information into you GPS and you will be all set.
Well maybe not.
A GPS is a very versatile backcountry computer and
satellite receiver. Today’s receiver can
be taken anywhere around the world and when setup properly will provide
accurate position information. Coordinate
information can be uploaded/downloaded to a PC and edited.
It is the setup process
that our fisherman needs to be aware of.
There are two setup features that I’d recommend the user
become familiar with. These two features
are the coordinate system used and map datum.
In my GPS classes these are topics of frequently lengthy
discussions.
Coordinate system refers to the grid used to describe
your position in the world or on a map; “X” marks the spot. Latitude and Longitude are the most common terms
associated with coordinates. In
elementary school geography we were introduced to Latitude and Longitude in the
format of “degrees – minutes-seconds” or as found in your GPS “hddd mm
ss.s.” This is the format used on
topographic and Forest Service maps. There
are two other formats available in GPS receivers and these are:
- “degrees-minutes.minutes”
referred to as “degrees-minutes decimal point minutes” and found in your
GPS as “hddd mm.m.”
- “degrees.degrees”,
referred to as “degrees decimal point degrees” and found in your GPS as
“hdd.d” - This looks a bit odd the first time you see this coordinate
read-out.
To learn more about Latitude and Longitude visit:
http://www.nationalatlas.gov/articles/mapping/a_latlong.html
or check June Flemings’ book “Staying Found;”it is a great reference.
New GPS receivers are setup to use “degrees-minutes.minutes.” If the fisherman’s friend got the coordinate
from a USGS topographic map that data is in “degrees-minutes-seconds.” The difference between the two (in Central
Oregon) will be many meters apart. So,
while you may think you are going to the right spot, you’re not.
The lesson here – find what coordinate system is being used. Not all GPS users are aware of this.
How do you set up your GPS for the right coordinate
system? On a Garmin select main menu,
then select “set-up,” then select “units”
Sometimes graphics can be more illustrative. First, select the main menu and then select
“setup”:
Blake Miller/Outdoor Quest image |
Then select “units”
On the “units” page select “position format.”
From the drop down menu you
will be able to select the format you desire.
This leaves us with a short
discussion of map datum. My favorite
explanation is from Garmin’s web site.
“Datum is a
mathematical model of the Earth which approximates the shape of the Earth, and
enables calculations such as position and area to be carried out in a
consistent and accurate manner. Lines of
latitude and longitude on a map or chart are referenced to a specific map
datum. Every chart has a map datum reference.
The map datum is usually listed in the title block of the chart.[1]”
This model is essential for taking
the geographic features from a spherical earth and representing it on a flat
map.
New GPS receivers are set to
the map datum “WGS 84.”
But, similar to our
coordinate system review, USGS topographic maps are set to “NAD 27 CONUS (North
American Datum 1927, Continental United States.)”
The datum your map is using
will be identified in the map key of your topographic map (above.)
As with coordinate system,
if you are using the wrong datum you could be about 100 meters west and 35
meters north (in Central Oregon) of your intended destination.
To wrap this up, I would
always recommend you check the coordinate system and map datum of position
information that is provided to you.
Some considerations that
I’ll offer:
- Most GPS users
are not familiar with the various types of coordinates and datum.
- If coordinates
are coming from another receiver, shift your receiver’s setup features to
match those of your friends unit.
- If coordinates
are coming straight off a map, take a look at the map to ensure that the
coordinates given are in the right format.
For example, if you are getting coordinates from a USGS topographic
map verify that they are in “degrees-minutes-seconds.”
- Most countries
have their own datum and many use their own coordinate system. Check the map key for the country you
will be visiting. The drop down menu
(for datum) on the “units” page will indicate which country your receiver
will align to. If you can’t
determine what the host country is using select WGS 84.