compass rule
See Also: closure error
[surveying] A widely used rule for adjusting a traverse that assumes the precision in angles or directions is equivalent to the precision in distances.
Finding compass bearings and grid bearings
To find grid bearings you must know how far off grid north the compass points in your locality. Look in the margin of your NTS topographic map for the compass declination. The rhyme to use is: ...
The Beidou/Compass G4 satellite launched on October 31 achieved geostationary orbit by November 6. The satellite is positioned at about 160 degrees east longitude. G4 is the furthest east of the operational Beidou geostationary satellites.
Pictured below are two different types of compasses. The compass at left is a Brunton compass used by geologists and others for many specialized mapping purposes.
Compass Rose
A compass rose is a design on a map that shows directions. Fill in the directions on this compass rose printout.
compass locator
a low-power, low- or medium-frequency (L/MF) NDB that is installed at the site of the outer or middle marker (MM) of an ILS (it can be used for navigation at distances of about 15 miles or as authorized in the approach procedure) ...
Compass with rose in center
In China between 1040 and 1117, the magnetic compass was being developed and applied to navigation.[2] This let masters continue sailing a course when the weather limited visibility of the sky.
Compass type aspect maps are measured in degrees clockwise from north.
This module uses oceanographic conventions, i.e. arrows point downslope or direction "to", as opposed to atmospheric conventions (direction "from").
EXAMPLE ...
Compass orientation of slopel
Small grain stubble (barley, wheat, oats) and mowed hay.
Soil series used as surrogate for roughness bassed on stone content (wt/ %fragments
75 mm). Table 2.
Compass and inclinometer; Coal Investigations Map (USGS)
CIA
Central Intelligence Agency (U.S.) ...
Bearing: The compass direction from a position to a destination, measured to the nearest degree (see azimuth). In a GPS receiver, bearing usually refers to the direction to a waypoint.
Suggested Reading
Buying a GPS for Outdoor Use
Mapping and GIS ...
Displays the compass position of the satellites through the day.
SkyPlot
Displays the trajectory of each satellite on its path.
Note how the satellites are clustered in the southern sky.
strike The compass direction of the intersection between a structural surface (e.g., a bedding plane or a fault surface) and the horizontal.
Recently featured: Compass rose - Soyuz TMA-9 launch - Camouflaged Marine
Archive - More featured pictures...
Featured list: List of Justices of the Supreme Court of Canada ...
Cardinal Points The four main navigational directions (North, East, South, and West) found on a compass or a map.
Usually referring to in compass directions such as degrees or as cardinal directions (e.g., north, west). Attribute ...
aspect The compass direction toward which a slope faces, measured in degrees from North in a clockwise direction. ASRG ARC Standard Raster Graphic.
orientation Establishing correct relationship in direction with reference to points of the compass; the state of being in correct relationship in direction with reference to the points of the compass.
A compass is the instrument of choice for following a prescribed route. It shows the deviation from a standard direction, called a bearing or course (for our purposes, magnetic declination is irrelevant).
Again, your compass work in geometry should rekindle the draftsman's approach. The GIS, on the other hand, uses the slope of each line segment and the equation for a straight line to calculate the end points of the parallel lines.
In 1770, while sailing down the northeast coast of Australia, Captain Cook began experiencing erratic behavior from his compass.
Critical analysis and reflection extends beyond the techniques of toolmaking to encompass questions about the social responsibilities of toolmakers and the social implications of the widespread adoption of the tool (Smith 1992; Pickles 1991; 1994; ...
A Magnetic Compass
To directly map small areas, a more sophisticated version of the military officer's sketch map could be made using a 'plane table'.
A rhumb line, or loxodrome, is a path of constant compass bearing on the earth's surface (or in the air just above the surface).
Secondly, the metadata must encompass and support the data manager and records management officer in a local agency in all aspects of data management including data definition, source documentation, management and updating, ...
Several long standing questions about ruler and compass constructions were finally settled by Galois theory.
a magnetic compass pivoted on a horizontal axis will show variations in the angle of this field in respect to the earth.
One digital map may encompass many paper maps. But when the paper maps are laid edge-to-edge, features running across the boundaries of the map sheets are not always properly aligned.
The Navigation screen provides an active compass. Again basic position, speed and altitude information is included. Several options are offered for displaying the compass and other details, including a rotating or fixed compass of various sizes.
A compass course or a compass bearing plotted on to a Mercator projection is a straight line, even though the shortest distance between two points on a Mercator projection - the great circle path - is not a straight line.
Wide field views can encompass the full systems of clouds comprising such lows. This view of an incoming storm low (swirls move counterclockwise) approaching the coast of California was made by the SeaWIFS instrument on the OrbView-2 satellite.
Geographic information systems encompass:
the computers, plotters, printers and other hardware that support the system
the spatial data that are used in the system
the software that allows users to display and analyze the data ...
extent of the digital orthophoto is equivalent to an orthophoto quarter-quadrangle (3.75-minutes of latitude and longitude), plus a minimum of 50 meters to to a maximum of 300 meters of overedge is included, sufficient to offer coverage to encompass ...
aspect can be measured in degrees from North or by compass points - N, NE, E etc.
slope and aspect are useful in analyzing vegetation patterns, computing energy balances and modeling erosion or runoff
aspect determines the direction of runoff ...
A projection is azimuthal or zenithal when angles or compass directions from one central point are shown correctly to all other points on the map. However, to achieve this property, shapes, distances and areas are badly distorted.
Careers in GIS can also encompass business development, managerial, and administrative roles.
Insights ...
They encompass residential, commercial, and industrial districts. They provide jobs and entertainment both for those who live there and those who come in from outside. Most importantly, they are recognized by the local population as unique places.
Mercator- A conformal, cylindrical projection tangent to the equator. Originally created to display accurate compass bearings for sea travel. An additional feature of this projection is that all local shapes are accurate and clearly defined.
Aspect A position facing a particular direction. Usually referring to in compass directions such as degrees or as cardinal directions (e.g., north, west).
People have used magnetic compass, sextant, theodolite and measured the positions of sun, moon and stars to find out his own position.
Aspect identifies the steepest downslope direction from each cell to its neighbors. The value of the output raster dataset represents the compass direction of the aspect: 0 is true north, a 90-degree aspect is to the east, and so forth.
Shows high resolution images taken at oblique angles of about 45 degrees from the four compass points and from directly above.
Planimetric Map ...
Beginning this Tuesday (June 18th), you should bring with you to class each time: scissors, tape, ruler, compass, sharp pencils, plain white paper. It would be a capital idea to bring extras to rent to your classmates.
Extend your 'yon plane' to encompass the area beyond your section that you want to see.
Play with the height of your sight-line to reveal more or less of the surface behind your section-cut.
Other satellite navigation providers are adopting L1C as a future standard for international interoperability. Japan's Quasi-Zenith Satellite System (QZSS), the Indian Regional Navigation Satellite System (IRNSS), and China's Compass system all plan ...
Northstar Technologies -- a long time GPS/Loran-C manufacturer
Silva sells under the name Brunton in the U.S. and has a line of GPS units with built-in compasses
Trimble Navigation Ltd.
Because a plane is a conveniently basic way to depict a compass direction, often called an azimuth, this projection family is called azimuthal (az i MYOOTH ul). The other surfaces give us cylindrical and conic projection families.
The direction that a compass points. The location where Earth's magnetic field dips vertically into the Earth.
Magnetic Reversal: ...
 See also: Information, Geographic, Feature, GIS, Mapping
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