Land surveying has been in practice almost since the beginning of civilization. Defining borders and knowing exactly how much land one owns is a basic human instinct, so the profession (some would call it the art) of land surveying developed to meet that need. Surveying is also used to triangulate the exact dimensions of a building or city before construction begins, so its importance can't be overstated.
In the beginning, land surveyors used lengths of chain, poles and complex mathematical equations to calculate the distance between two points in three dimensions. Over time, inventions have appeared that have made the land surveyor's job not only easier, but much more accurate. However, with the spread of digital, GPS and computer technology, sometimes surveyors can trade convenience for exact accuracy.
One of the earliest surveying tools was the theodolite. The first mention of the theodolite was found in the surveying text Pantometria, written in 1571 by Thomas Digges. A theodolite is an instrument that looks a bit like a small telescope mounted on a tripod.
The device can be used to calculate the distance from its location to a specified point -- usually a guy wearing a hard hat and holding a pole. The surveyor can look through the eyepiece of the theodolite, which contains mirrors and a small, etched piece of glass to measure distance, and gather the information he needs to triangulate the property. This device was the most widely used piece of surveying equipment for 200 years, until the invention of the total station in the 1970s.
The total stations of today use lasers to measure the distance from a known point to a prism in the field. Usually a total station will come equipped with a laser that is programmed to scan a small bar code or etched piece of glass inside the prism. Then, using trigonometry, the surveyor can calculate the coordinates on the X, Y and Z axes of the building, land site or construction site he's surveying. He then enters those coordinates into a data collecting device and downloads them onto his computer so that he can map the site in three dimensions.
Because boundaries are so important, and because the exact height, width and length of buildings can make the difference between a sound structure and one that will fall apart in 10 years, surveyors use technology to help them measure as accurately as possible. Digital levels measure the height of flat or sloping surfaces, and they can be used to measure the grade and ground profiles of a job site. They have the added advantage of being portable and lightweight, plus they can immediately send data straight back to the home office computer. High-quality digital levels will measure to a field of 30-40 centimeters.
Like digital levels, surveyors have adopted GPS technology to help them triangulate a point or position. GPS is still only accurate to about 3 or 4 meters, and surveyors take this into account when measuring a site. The GPS will usually be situated with a total station at a known point in space with exact coordinates -- latitude and longitude, for example. Then the surveyor will send a signal from the opposite point that the GPS will read and record. The total station can then give an approximate distance and measure height and width as well.
Surveyors use caution when relying upon GPS technology due to its large margin of error, but they applaud its invention as well. Mark Cheves, editor of Professional Surveyor magazine, says a job that used to require at least two people is now easy for one thanks to GPS. It's a good thing, too, Cheves says, because surveying is not the most popular profession. Making GPS even more vital is a shrinking number of experienced surveyors. More and more companies are requiring their new hires to have a four-year degree in a related field, and these graduates are highly coveted.
Brief History Of Chinese Civilization
The myriad details of restoring or furnishing a period house are enough to overwhelm even the most dedicated homeowner. Paint colors, wood finishes, floor covering, lighting fixtures; chosen wisely, these elements can combine to produce a satisfying authenticity. The selection of appropriate textiles can add a visual and textural dimension, a finishing touch of comfort and warmth. Tapestries, in particular, can be used effectively in almost any period home.
Tapestries have been important elements in American interior design both early and late. They were the height of fashion in the 17th and late 19th centuries, and maintained a more modest popularity during the intervening periods.
Early use in American d'cor
In the 17th century, colonists, as British citizens, were determined to be as refined in the Colonies as their countrymen in the Mother Country. The wealthy and socially conscious remained in vogue as much as time and distance allowed, importing English fashions and goods to the growing urban centers. European-made tapestries were often listed among the most valuable items in estate inventories of the wealthy. As either wall hangings or bed hangings, they were admired by visitors; during this period, the best bed, splendidly adorned with rich tapestry art, was found more often in the parlor than the bedroom or ?chamber.?
From the early 18th century to the late 19th, rich fabrics, including tapestries, were used in parlors and ?best rooms,? but less frequently on walls. The British artist Charles Eastlake, widely read in America in the mid-19th century, cautioned that wall tapestries may be at risk in homes in dirty, industrialized cities, where they lacked protection from soot, coal dust, and smoke, but their popularity persisted as furniture coverings.
A popular option for Americas wealthy
By the late 19th century, American industry had given rise to unprecedented wealth, held (and liberally spent) by families such as the Vanderbilts, Astors, and others. Perceiving themselves as the American aristocracy, they built both urban and country homes (the latter often referred to as ?cottages?) modeled after European palaces and grand estates.
Tapestries were an important element in the decorative scheme of such grand houses as George Washington Vanderbilt's Biltmore, the dining room of which featured two massive 16th century tapestries of Vulcan and Venus as the focal point. Like their Colonial counterparts, the 19th century American ?royalty? sought to display their very new wealth even as they imitated the interior design fashions of centuries before.
The revival in tapestry art
In less luxurious homes, tapestries were literally off the wall, appearing more often as drapery or upholstery fabric, or as a decorative covering for a table, piano, or mantel. Portieres, lambrequins, and valences often used jacquard-woven tapestry fabric to enrich a decorative scheme, providing texture, color, and visual interest. William Morris and his cohorts in the Arts and Crafts movement re-introduced tapestry as both an art form and an element in interior design, and it was once again seen in homes on both sides of the Atlantic. The fashion was short-lived, however, and little innovation in tapestry design appeared for several decades.
A revival of interest in tapestry art began in the mid-20th century. As modern architecture became more austere, large, unbroken walls presented the opportunity for colorful and textural tapestry, executed in designs far removed from the picturesque motifs of centuries before. As an alternative to framed paintings, tapestry art was valued for its portability in an age of increasing mobility. Individuals and families moved from apartment to modest home to larger home as their circumstances changed; tapestries could be folded or rolled and easily moved, to be hung in a new setting.
Popular in any period home
While the popularity of tapestry as a design element has varied throughout American history, the wide range of available motifs and ways to use these intricate, often striking textiles allow for the homeowner to be creative with their use, resulting in an unexpected focal point, large or small, in any period home.
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Joan Youngken has sinced written about articles on various topics from Information Technology, Interior Design. Joan Youngken writes on a number of home d'cor subjects including textiles and . In her free time she sources european tapestries for The. Joan Youngken's top article generates over 720 views. to your Favourites.
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