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Topographic maps of the backcountry work with your compass and GPS
The following is an update of our original web page posted in 2002. The original page, archived below, remains a good description of the role of maps in finding your way in the backcountry. However, the production and distribution of useful topographic maps has evolved dramatically in the past eight years. And a new option becomes available. Here is the rest of the story.
All topographic maps published in the United States are based on the (only) complete Federal Government aerial photographic land survey (done in the 1960s), which resulted in the 7.5 Minute Quadrangle map series of 57,000 paper maps covering all fifty states. The 7.5 Minute Quad topo maps of Oregon total more than 1,900 sheets. In the recent past, in large wooden cases, map and blueprint stores carried the complete set for their State and perhaps popular maps for nearby States. The United States Geographic Survey carried a complete inventory of all USGS topo maps at centers across the nation. Outdoor stores once carried the more popular maps for hunting, hiking and other adventures.
Individual entrepreneurs such as Al Cardwell's "Geographics" in Oregon, use the USGS computer data base to produce a series of convenient maps of popular recreation areas such as the Three Sisters Wilderness in Oregon. This Geographics map combines corners of three or four Quad maps onto one conveniently folded sheet at about the same 1:24,000 scale as the Quads. The reverse side of the paper Geographics map has a larger scale map "socialized" to provide information about trail heads and other amenities. These maps should be in everyone's car or pack, but they do not replace the grid lines and detail of the original 1:24,000 USGS Quads on which they are based.
Mountain bikers, skiers, hunters and fly-fishers have their own specialized maps published by entrepreneurs. They provide a service because they concentrate on the trails for, say wilderness lakes. Makers can adjust the scale to cover parts of several Quad maps on a single convenient sheet. They contain up to date data which is not found on the Quad maps.
However, these private maps do not provide the detail, accuracy, grid lines and other information needed by today's informed backcountry navigator. None of the private maps that I have seen are GPS friendly! Most users do not know what they are missing because they do not know that the UTM Grid can be used to locate a hand held GPS position within a few meters (4.1 average) by eye alone. Most people do not understand the value of finding exactly where they are on a detailed topo map. You cannot find your way back if you do not know where you are!
"Terrain Navigator" by My TOPO (formerly Map Tech) and "TOPO" by National Geographic are computerized map programs based on the USGS Quad data. You can print your own custom maps 1:24,000 scale (Quad maps) on letter sized writing paper. These $99.00 "topo map" computer map programs are sold in outdoor stores, almost every where.
You need to be able to "communicate" the location of points on the map other than by pointing to a spot. The easiest way to do this is by naming coordinates on a grid (say, the intersection of Highway 20 and 27th Street). One such grid is the Latitude and Longitude Grid used by Lewis and Clark, by sailors and by pilots. Another is the Public Land Survey Grid providing metes and bounds to identify ownership of plots of land. The Public Land Survey Grid is not referenced by GPS receivers. Latitude and longitude Coordinates’ are very tricky to find on a map due to converging longitude lines on a flat map. (Special tools are required to plot lat-lon Coordinates; It is difficult to find lat-lon coordinates accurately, by "eye".)
The most useful grid in modern land navigation is the Universal Transverse Mercator Grid (the "UTM" grid). The "UTM" Grid is imprinted (or can be user completed with pencil and yardstick) on all USGS Quad Maps, enabling one to pinpoint and communicate easily, a location accurately to a few yards. The map is divided into one kilometer square boxes, easy to divide into tenths, even by eye.
The GPS receiver will give you your location in UTM Coordinates, of little use if you do not have a map imprinted with the UTM Grid. The 1:24,000 USGS Quads are based on NAD 27 Datum. You must select UTM Coordinates and NAD 27 Datum (and True North) from the options on your own GPS Receiver.
More and more people are finding that buying a simple $99.00 computer program such as My TOPO's Terrain Navigator or National Geographic's TOPO is very helpful in planning adventures. Both computer programs contain all of the 1:24,000 USGS Quad maps and other scaled topo maps for each particular State.
Garmin GPS Receivers must be loaded with their proprietary $99.00 Garmin Map Source program using 1:100,000 scale maps. (This program must be purchased in addition to the cost of the GPS.) These maps do not appear to have the actual detail of the USGS 1:100,000 series. You need paper topo maps to find your way in the backcountry! The $99.00 box of National Geographic TOPO maps for the State of Oregon alone has 8 CD data disks containing all of the 1,900 1:24,000 Quad maps and related 1:100,000 topo maps. The $99.00 Garmin MapSource 1: 100,000 scale program for the ten western states is on one CD!
During the last few months, in 2010, Garmin has made available DVD based software sold by States for $99.00, with 1:24,000 Quad map data for their more expensive GPS receivers, (those models with an SD chip for storage)! However, many users feel the width of the topographic and other brown lines overwhelm the small screens of most Garmin models!
Most map-enabled GPS receivers can be loaded only with a small geographic area, say the Oregon Cascades. More costly GPS models have an option to add a data chip (at extra cost) so that more of a state can be loaded, but most users only recreate in small areas that can be loaded on the regular map enabled GPS. (Motor home travelers may need more area but there are other options for them including a laptop computer plugged into the cigarette lighter.) Avid Geocachers use palm pilots and other mini portables.
In short, just use a Garmin eTrex H ($99.00) or better, a Garmin eTrex Venture HC ($140.00) GPS and have a paper 1:24.000 topo map in your pocket (and a base plate declination adjusted compass, of course).Using the map, compass and GPS together
A good map says one thing: Adventure
Keith Ridler,
The Bulletin
June,
2002
And judging by the number of maps for the area, Central Oregon offers plenty of just that.
But trying to pick out something like the "Top Five Maps of Central Oregon" is a
lot like trying to pick out the two best golf clubs in a 14-club set.
Like golf clubs, individual maps are created for specific purposes. It's tough to rank them in importance.
Still, not all maps are created equal. They come in different scales, some showing great masses of land with little detail and others showing tiny areas with great detail, including topography.
Some maps have the Universal Transverse Mercator (UTM) Grid that is designed to be used today with small hand held receivers for the global positioning system (GPS). Some maps don't provide much backcountry detail but are invaluable as an introduction to the highlights of a given area.
"Maps are the foundation of navigation," says Bob Speik, a long-time mountaineer and local instructor in the use of maps. “You could get along without a compass but not without a map.”
For picking out some top maps for Central Oregon, it's best to start with the big picture, and then work down to more detailed maps.
Two map atlases tend to play a big role for local adventurers: the "Oregon Road & Recreation Atlas" and the "Oregon Atlas & Gazetteer." Both cost around $17 and offer roughly the same thing in an easy-to-use book format. The first shows maps in a 1:250,000 scale, and the second in a somewhat more detailed
1:150,000.
"What we're trying to do is make a detailed road map in which you can easily visualize where you are, where you're headed and what the lay of the land is," says Stuart Allan of Allan Cartography in Medford, which is putting out a
new edition of "Oregon Road & Recreation Atlas" in early May. "It's not super detailed; you don't take it hiking."
Going to a smaller scale are a pair of maps that can come in handy: the Deschutes and Ochoco national forest maps, $6 apiece, have a 1:126,720 scale.
These are not the maps to take if you're wondering far from your vehicle, but they do a good job of pointing out the area's highlights, such as campgrounds, trailheads and notable features.
"The Deschutes map really is, from my perspective, a map that gets you introduced to the area, and perhaps whets one's appetite on what might be out
there," says Bill Queen of the Deschutes National Forest, noting the map was updated in 2000. "But I wouldn't just take the Deschutes National Forest map with me as my sole source. It has a large variety of information on it, but it's
not a map that you want to pick up and travel cross country from point A to point B because it doesn't have any contour lines on it. But it's certainly the best overall map that shows a wide variety of recreation opportunities available on the forest."
The Deschutes National Forest has four ranger district maps … Bend, Fort Rock, Crescent and Sisters … that are incredibly detailed road map originally designed to be used by forest fire fighters to plot strategy.
These maps are available at the Bend/Fort Rock Ranger District office on Highway 97 in Red Oak Square in Bend or the Deschutes National Forest Supervisor's Office on Highway 20 near Pilot Butte in Bend for $3 apiece. Those maps increase to $4 on March 1.
The Ochoco National Forest has two Ranger District maps: Paulina/Big Summit and Prineville/Big Summit. Those maps are available at the Ochoco National Forest office at the east end of Prineville on Third Street
Because of their size, these ranger district maps are somewhat unwieldy and nearly impossible to open inside a vehicle.
"They show forest roads, old logging roads, rabbit trails, everything," says Jenn Fishback of Bend Mapping & Blueprinting, Inc. which sells the Ranger District maps as well as many other regional maps. "I have a lot of (trail) runners use them.”
The Bureau of Land Management, sometime this summer, is planning to come out with a map of the lower Deschutes and John Day rivers. That map will replace the now outdated and out of print Central Oregon Public Lands map.
"The land status has changed significantly over the last few years with land exchanges," said John Hanf of the BLM's Prineville District. "We had folks buying those maps and having problems because they were accessing what was shown as public land on the map which wasn't."
The BLM opted not to put out a map for the entire district this summer. What's not covered on the new map is already available in the Deschutes, Ochoco and Malheur national forest maps, Hanf noted.
Two companies put out detailed county maps for Central Oregon: Pittmon and Metzger. These maps … ranging from $3 to $5 … don't have contour lines but show roads in great detail, though recently built roads might not show up.
"There are so many changes in this area that they can't keep up," notes Fishback.
That's about it for maps to use while in your vehicle. If you're heading into the country on foot, you're going to want a map with contour lines and, if you plan on using a GPS, a map with the UTM Grid.
With a small GPS receiver and a topographic map with the UTM grid, you can pinpoint your location to within a few feet. A GPS unit will give you two numbers that can be found on the edges of the map. Where lines emanating from those two numbers intersect on the map is where you are.
“It’s as simple as finding the intersection of Highway 20 and 27th Street”, says Speik.
One of the most popular backcountry maps for the region is the Three Sisters Wilderness map by GeoGraphics. It has a 1:26,966 scale and the UTM grid marks, plus all the popular trails.
Geo-Graphics also makes detailed maps for most of the other wilderness areas in the state.
The next step is the United States Geological Survey topographic maps at 1:24,000 scale, often called "quad maps," which can make traveling in the backcountry not only safer but more fun by seeing all the detail of the surrounding area.
For comparison, the typical Oregon road map in the glove compartment is usually
at a 1:500,000 scale. To fit Oregon on a 1:24,000 scale takes
about 1,900 maps the size of a state road map.
In fact, the entire conterminous 48 states, Hawaii and territories are covered by these USGS topographic 1:24,000 maps, numbering about 57,000 in all. For Alaska, maps on this scale are available for areas around Anchorage, Fairbanks and Prudhoe Bay and at larger scales for the rest of the state.
Quad maps for the entire state are available at Bend Mapping & Blueprinting, Inc.
for $5 each. Quad maps for national forests in Oregon and Washington are available at the Deschutes National Forest Supervisor's Office at $4 apiece.
Maptech, a New Hampshire company, sells an interactive computer program using CD-ROMs containing these quad maps for the entire United States. The Pacific Northwest set of thirteen CDs for Washington and Oregon plus the 3 D program costs $149.95. Their Web site is
www.maptech.com. (Maptech has sold this
program to My Topo. It is still my favorite.)
Maps can also be ordered directly from the U.S. Geological Survey, which also
has plenty of other offerings, many free, including a handy topographic map
symbols pamphlet. USGS customer service people can be contacted at
1-800-USA-MAPS, or at its Web site www.usgs.gov.
(Bend Map and Blueprint has most Quads of Oregon and other tools.)
A map isn't much good if you don't know how to use it. Speik's tutoring class, "Wilderness Navigation: Map, Compass and GPS," costs $30 per person for a three-hour session for groups of two to five people. Speik can be reached at
385-0445.
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