OutdoorWire News

OutdoorWire

OutdoorWire

Portal page for OutdoorWire Access and Landuse Central Read More
4x4Voice

4x4Voice

California OHV recreation news and information Read More
MUIRNet News

MUIRNet News

News and information about outdoor recreation Read More
4x4Wire

4x4Wire

Off road recreation and news and information Read More
TrailTalk 
Forums

TrailTalk Forums

4x4Wire TrailTalk Forums for 4x4 tech information Read More
  • 1

Recreation Advocate

The OutdoorWire family websites feature news and information affecting outdoor recreation opportunities and access to public lands. 

Know How To Read A Map, And You May Stay Alive

 

GPS units are of limited use when you’re driving off road. The maps and other data they provide tell you how to get from Point A to Point B, but they say nothing about the quality of the roads. This became painfully clear to a group that was traveling in the Grand Staircase-Escalante National Monument in early August. Instead of a leisurely ride, these folks found themselves being led down the wrong roads, many of which were barely passable, and way off course. They ended up at the edge of a cliff, where they spent the night before being rescued.


 
The GPS system offered what appeared to be the most obvious route, which normally is the most direct, but it could not account for the quality of the roads. Their vehicles got stuck in sand, and in their attempt to backtrack they ran low on gas. But they were lucky: they got out alive.
 
Driving off road requires more than just a command of a 4WD vehicle. You need a good topographical map to help you navigate that difficult terrain. Available from numerous retailers, a topographical map shows various features such as hills, streams, and gullies, and provides a better idea of the paths and roads you’ll encounter. If you don’t know how to read a topographical map, I suggest you find someone who can teach you.
 
One of the best topographical maps is the 7-1/2 minute series published by the United States Geological Survey (USGS). This is a very detailed map at a scale of 1:24,000. Most GPS mapping software is based on the work of the USGS.
 
If you are used to using latitude/longitude formats with your GPS in degree, minutes, and seconds, you should become familiar with the UTM (Universal Transverse Mercator) system. It makes pin pointing your location on a map (or vice versa) much easier.

The 7-1/2 minute maps also show UTM grid lines, which help you calculate the coordinates of your position. The UTM system divides up the entire planet into a series of grids six degrees wide by eight degrees tall. Each grid is referenced by a two-digit number representing the east-west direction and a letter that designates north-south direction. (For example, most of southern California is in UTM sector 11S.) Every location in the grid is measured north in meters from the equator and east in meters from a point west of the grid.
 
It might take awhile to grasp the entire concept, but fortunately you don’t need to in order to use UTM. You’ll notice tick marks along the edges of your map. These divide up the map into section 1,000 meters on a side. By overlaying a more detailed grid pattern, available through various stores, you can create subsections that are a mere 100 meters on a side.
 
A careful reading of the values of the east-west and north-south grid lines will give you the approximate coordinates for your location. Close enough, anyway, to lead rescuers to you and your family.
 
GPS receivers are extremely helpful for most trips. Heck I rely on the one in my vehicle to get me around the state and even out east to see my kids. But you shouldn’t rely entirely on one when you’re off road. Learning how to read a topographical map and calculate a location–which aren’t hard to do–can literally be a life saver, and bring a lot of peace of mind to your next off-road adventure.
 
------------------------------------------------
 
If you hurry, you can still sign up for one of the Mojave Desert trips.
Mojave Road October 9-11        http://www.4x4training.com/tours/mojaveroad.html
Death Valley October 12-15       http://www.4x4training.com/tours/Deathvalley.html
Mojave Expedition Oct 9-15       http://www.4x4training.com/tours/MojaveDesert.html
 
------------------------------------------------
 
I hope to see you on the trails!
 
Regards,
 
Tom Severin, President
Badlands Off Road Adventures, Inc
4-Wheel Drive School
310-374-8047
http://www.4x4training.com
Make it Fun. Make it Safe.

ARRA Newsletter - October 2008
Suspected Defective Tire Valves Investigated
 

Comments

No comments made yet. Be the first to submit a comment
Already Registered? Login Here
Guest
Sunday, 04 December 2016
If you'd like to register, please fill in the username, password and name fields.

Captcha Image

OutdoorWire Websites

OutdoorWire

OutdoorWire

Portal page for OutdoorWire Access and Landuse Central Read More
4x4Voice

4x4Voice

California OHV recreation news and information Read More
MUIRNet News

MUIRNet News

News and information about outdoor recreation Read More
4x4Wire

4x4Wire

Off road recreation and news and information Read More
TrailTalk 
Forums

TrailTalk Forums

4x4Wire TrailTalk Forums for 4x4 tech information Read More
  • 1

4x4Wire Tech Section

Jeep 4x4 Tech

Jeep 4x4 Tech

Jeep Tech from JeepWire Read More
Toyota 4x4 Tech

Toyota 4x4 Tech

Toyota Tech from 4x4Wire Read More
Mitsubishi 4x4 Tech

Mitsubishi 4x4 Tech

Mitsubishi Tech from 4x4Wire Read More
Isuzu 4x4 Tech

Isuzu 4x4 Tech

Isuzu Tech from 4x4Wire Read More
  • 1