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Parallax is when at different times of year, a star or other celestial body appears to be in a different place than other times of year. That is how astronomers tell the difference of celestial objects.
It may be the above but I know from experience that it is the affect of not being lined up with an object in a telescope with the cross-hairs so that the "target" in the scope is not lined up correctly. By moving the eye so that it is in the middle of the scope so that the view circle is centered with all the cross hair marks symetrically, then you can eliminate more of the tendency to be out of line with the true center line of the scope.
This can be very important when reading level rods to get the correct mark on the pole for the horizontal cross hair. Also important for the vertical if sighting in on a pole or target to measure angles from one target to another both vertically and horizontally for measurements.
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Method of surveying for two point problum in plane table surveying?
Radiation intersection traversing resection
What are the importance of plane table in surveying?
Answer this question...pls help me and answer it
What is the importance of reconnaissance in surveying?
To see the whole position of the site,to see whether there are magnetic substance or not,help to build map terrain,to see the nature of the ground,to collect vital information intelligence about the area
What has the author H George Classen written?
H. George Classen has written: 'Better Business English' -- subject(s): Business English, English language, Grammar 'Surveying as a career' -- subject(s): Surveying, Vocational guidance
Surveying chaining instruments?
A chaining instrument is one used to measure the straight line distance between two points by comparing the distance to a known lenght. In past times a chain of known link distance was used, typically the chain 66 feet was used roughly 30m with 100 links. Nowadays if a surveying tape or a metal band is used, it is still called chaining.
When land surveying how is parallax corrected?
Parallax in land surveying is corrected by ensuring that the line of sight through the telescope is parallel to the horizontal cross-hairs or line of collimation. This can be done by adjusting the focusing knob until the image is sharp, and by maintaining a consistent viewing position. By minimizing parallax error, surveyors can obtain accurate measurements and avoid distortions in their readings.
What is parallax bar?
Parallax bar is a device used in surveying to measure the horizontal distance between two points by creating a visual displacement of a point viewed through a telescope on a graduated rod. This displacement is used to calculate the distance based on the principle of parallax. It is commonly used in topographic mapping and land surveying.
land surveying schools in Palm Beach County?
The University of Florida offers classes in land surveying.
What is the term for measuring land?
The common term for measuring land is surveying.
Explain types of surveying?
Land surveying is mapping out land for land development. Hydrographic surveying is mapping bodies of water. Engineering is a type of surveying that has to do with buildings roads and other man made things.
Formula for land surveying?
polar
What is the difference between land surveying and geomatics?
geomatics differ with surveying in that it encompasses a broad range of disciplines than surveying,let alone surveying is a discipline under geomatics
What are general classifications of surveying?
General classifications of surveying include geodetic surveying, plane surveying, topographic surveying, cadastral surveying, construction surveying, and hydrographic surveying. Geodetic surveying deals with large-scale measurements of the earth's surface, while plane surveying focuses on small-scale measurements on a flat surface. Topographic surveying involves mapping of the land's natural features, cadastral surveying deals with land parcel boundaries, construction surveying is used for building projects, and hydrographic surveying is for mapping bodies of water and their features.
What is linear land surveying?
linear land survey is too good
What is a parallax bar used for?
A parallax bar is used in surveying to measure horizontal distances and elevations. It typically consists of a bar with two telescopes at each end that can be used to accurately measure distances by taking line of sight readings.
What is the purpose of surveying a land?
The purpose of surveying land is to accurately measure and map its boundaries, size, and topography. This information is crucial for land development, construction projects, property transactions, and legal disputes. Surveying helps ensure that land is used and managed effectively and that property rights are clearly defined.
How old is land surveying?
Land surveying can be traced back to ancient civilizations like the Egyptians and Romans, making it thousands of years old. The modern practice of land surveying began to take shape in the 18th century with advancements in technology and the establishment of professional organizations.
