Nobody downloaded yet

Assess whether orthophotos are a suitable substitute for a traditional line map - Essay Example

Comments (0) Cite this document
Summary
Running head: ASSESSING WHETHER ORTHOPHOTOS ARE A SUITABLE SUBSTITUTE FOR A TRADITIONAL LINE MAP Assessing Whether Orthophotos are a Suitable Substitute for a Traditional Line Map Insert Name Insert Insert 09 August 2011 Assess whether orthophotos are a suitable substitute for a traditional line map Introduction When a camera is used to take a photograph of the earth, the photo is recorded as a perspective projection…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER96.9% of users find it useful
Assess whether orthophotos are a suitable substitute for a traditional line map
Read TextPreview

Extract of sample "Assess whether orthophotos are a suitable substitute for a traditional line map"

Download file to see previous pages Central perspective projection involves sensing the entire field within a view from a single point in space.1 The single point in space can be the geometric center of the camera lens and this projection is mainly associated with the vertical aerial photographs taken with a frame camera. In central perspective projection, the horizontal position of pixels on the photograph is wrong or misplaced, and is only correct at the nadir position if the topography has a relief and the magnitude of positional shift or relief is a function of relief, the altitude of the sensor H and the focal length of the camera f.2. In a central aerial perspective, the viewpoint is high compared to the object or landscape, whereas in central ground perspective, the viewpoint might be made to equal the height of an upright person.3 Due to its nature, central perspective projection is mainly associated with aerial photographs. Topographic maps are quite different from aerial photographs since they have an orthographic projection that involves viewing earth directly below from poly-perspectives that are parallel to each other. This view eliminates relief displacement, leading to all positions to be indicated correctly. The object’s dimensions are projected directly, making orthographic projections to retain shape and proportion, thus the drawings are accurate, precise, appear flat and lack 3D quality of perspective drawings.4 The orthographic projection distorts both area and direction; thus, when earth globe is viewed, the projection shows a single hemisphere in perspective.5 Orthographic projection is mostly associated with orthophotos. Orthorectification is “the process of transforming a central perspective image into an orthogonal image by removing positional displacement caused by topographic relief from the input image, in addition to providing the ground coordinates for all pixels”6. The effect of other parameters present during image capture including angle of viewing, height of the position and earth rotation are also eliminated from the rectified image like what happens in standard image georeferencing. Hence, orthorectification reduces geometric errors normally found within photography and imagery by taking raw digital imagery and applying a digital elevation model (DEM) and triangulation to create an orthorectified image within which each pixel possesses geometric fidelity.7 Orthorectified images are commonly referred to as orthoimages and they have a uniform scale that is deficient of any relief displacement. Orthorectification is normally used for large scale hyperspatial resolution images or aerial photographs. It’s very suitable for mountainous terrains and for remote sensing materials that are used to construct 3D models of the scene. Processes for rectification Before image orthorectification takes place, the relationship between image coordinates (r, c) and the ground coordinates (E, N, Z) must be established and spaceborne satellite imagery of this relationship is based on the exterior and interior orientation parameters of the sensor, with the aid of 3D GCPs.8 Image rectification is achieved through either nonparametric or parametric approaches. Nonparametric means use transformations similar to those used by 2D polynomial-based ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Assess whether orthophotos are a suitable substitute for a traditional Essay”, n.d.)
Retrieved from https://studentshare.org/geography/1430247-assess-whether-orthophotos-are-a-suitable
(Assess Whether Orthophotos Are a Suitable Substitute for a Traditional Essay)
https://studentshare.org/geography/1430247-assess-whether-orthophotos-are-a-suitable.
“Assess Whether Orthophotos Are a Suitable Substitute for a Traditional Essay”, n.d. https://studentshare.org/geography/1430247-assess-whether-orthophotos-are-a-suitable.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Assess whether orthophotos are a suitable substitute for a traditional line map

MAP

...who are brighter and are given more difficult work (Skipi 74). On the contrary, even though the application of the MAP in schools set up has bottlenecks, it is not just important to center on the limitations without considering its advantages as a primary tool for doing assessment.. Its function is relevant in academic arena since it gives an accurate portrayal of the MAP as an actual MAP test given the above highlighted functions. It also helps in placing students who are still new in school in suitable instructional programs. Given its scope of application, I support the MAP test to be very essential in learning environments. Teachers...
3 Pages(750 words)Essay

Curriculum Map

...hands on as well as autonomous learning liberating up the instructor to act mainly as an observer and a facilitator Long Range Curriculum Mapping Teacher :( Insert the name) Grade: 8th School: (Insert the name) First Week Second Week Essential Questions How does writing assist me communicate? How does message writing assist me communicate? Content Content Focus Style Organization Content Focus Style Organization Benchmarks/ skills 1.5.8 A- Write with a distinct, sharp focus. 1.5.8. B- Write using a well established content suitable for the unit. 1.5.8.D-Write with a comprehension of the stylistic facets of composition 1.4.8. B- Write multi passage informational pieces like descriptions, letters, essays,...
10 Pages(2500 words)Assignment

Substitute for Animal Testing

...Is there a substitute for Animal Testing' An argumentative essay Discipline' Is there a substitute for Animal Testing' Every day thousands of people worldwide are treated for dreadful diseases. We overlook the fact that this bliss of medical treatment has been made available after long term animal testing. Despite these overwhelming benefits, some people are against animal testing. Those opposed to the use of animal testing claim that it is atrocious and brutal to use animals in experiments. They believe that the outcomes of animal experiment are misleading and not pertinent to human as their physiology is different .Further, the stress that animals undergo; adversely affects the result of studies. While,...
6 Pages(1500 words)Case Study

Conceptual Map

...expectations and metrics, which can be done by the use of metadata or data quality metrics, indentifying poor data and its limitations, assessing data quality limitation and improving data quality through human experts or state-of-the-art tools. Data integration is essential for unified view of the patients. It also allows combination o information on patients’ products and better understanding of patients’ needs and its findings are useful in planning, marketing and sales efforts. Data integration tools include statistical modeling, campaign management and data mining. Conclusion All these lead to improved data quality and subsequently lead to improved results, reduced cost and informed healthcare decisions. They also...
2 Pages(500 words)Essay

Map

...Your Motivational Mind Map The factors that have been mentioned here are reflective of the following themes: Appreciation, satisfaction, enjoyment and professionalism. These factors would help me improve and be a better person for everyone. To do this, I need inspiration, discipline and active participation. This applies to all motivating factors. The negative factors that hinder my goal, are the lack of appreciation and the need to always satisfy my clients and colleagues. The lack of knowledge can sometimes be a hindrance, that’s why adequate training should also be done. Strategy Map The resources that I have in order to improve on myself are the following: first, my will and decision to improve; my...
2 Pages(500 words)Essay

Karnaugh Map

...by using different methods, most of which are not suitable for computer implementation. Laws of Boolean algebra simplified by the Karnaugh map have a wide application in minimization of the logical functions. The map represents an efficient tool for minimizing logical functions with less than six variables (Seda, 2008). The Gray Code or the reflected binary code represents a binary numbering system in which two consecutive values vary in only a single bit. This code is non-weighted. The invention of the code served to prevent spurious electromechanical switches output. Currently the Gray Codes have a wide application in facilitation of error collection and digital communication. In...
2 Pages(500 words)Essay

Fat Substitute

...Fat Substitutes Fat substitutes are products that mimic the properties of food with fats. They are artificially created or man-made substances that provide the same taste and texture as the food with fats. The chemists have researched and produced different fat substitutes like a gel from red seaweed, Carrageenan, Olestra etc. These fat substitutes may be categorized in three major classes including: Carbohydrate-based fat substitutes, Proteins and microparticulated proteins and Fat-based fat substitutes (AHA, 2013). Research suggests the positive impacts of fat substitutes on the nutritional history of people. The U.S....
1 Pages(250 words)Essay

Waldseemller map

...The Martin Waldseemüller’s 1507 World Map The Martin Waldseemüller’s 1507 World Map online is divided into twelve sections, divided into 18 by 24.5 inches (46 cm × 62 cm). When each of the section is assembled, it portrays one of four horizontals and three vertically. The Waldseemüller map uses Ptolemaic map projection in a modified way to curve the meridians that represent the entire earth’s surface. There is a miniature world map in the upper part of the main Waldseemüller map that represents an alternative view of the world to some extent (Hessler 34). In comparison to most of other maps recorded in the 1500s such as...
2 Pages(500 words)Article

Linkage Map

...The Linkage Map of HR in Achieving Strategic Objectives Organization Strategic human resource management aims at effective and efficient utilization of employees to appropriately achieve the goals of the organization. Human resource planning is responsible for linking aspects of human resource management with the general organization strategic goals. The key areas of human resource management directly linked to the strategic goals are; developing employer brand, staff motivation, retention strategy, staff resourcing, staff remuneration and career development. The planning aspects of best practice corporation entails what is to be achieved in a stated timeframe, and also the categories of human resources required in realizing... are...
2 Pages(500 words)Assignment

Community Map

...Political Science Community Map Insert Insert According to Merriam-Webster Dictionary, the word community means a group of people who have the same interest, religion, and race. The community also means a group of people who leave in the same city, town and neighborhood. Although we live in a tight-knit community, some of the neighbors do have different values and vision about their community map. All of the maps are very similar to a slight distinction between them that make each of them unique in its own way. My map has the apartment complex, which I reside at, and a gas station nearby. I draw the city hall of North Miami along with the police station, but I notice my...
1 Pages(250 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Assess whether orthophotos are a suitable substitute for a traditional line map for FREE!

Contact Us