PART 3

• Chief of the Party - The person who is responsible for the overall direction, supervision, and operational control of the survey party. He is also responsible for the logistical and technical requirements, and problems of the field survey operation
• Assistant Chief of the Party - The person whose duty is to assist the chief of party in the accomplishment of the task assigned to the survey party in the accomplishment of the task assigned to the survey party. He takes over the duties of the chief of party during the absence of the chief.
• Instrument man - The person whose duty is to set up, level, and operate surveying instruments such as the transit, engineer’s level, theodolite, sextant, plane table and alidade, and etc. He sees to it that instruments to be used in the survey are in good working conditions and in proper adjustment.
• Technician - The person who is responsible for use and operation for all electronic instrument required in a field work operation.

  It is his duty to see to it that theses equipment's are functioning

  properly, are regularly calibrated, and are in proper adjustment.
• Computer - The person whose duty is to perform all computations of survey data and works on necessary computational checks required in a fieldwork operation. He is responsible for the utilization of electronica calculators, pocket, microcomputers, and assists in the operation of computerized surveying systems or equipment.
• Recorder - The person whose duty is to keep a record of all sketches, drawings, measurements and observations taken or needed for a field work operation. He keeps table of schedules of all phases of field work operation and the employment of the members of the survey party. He does clerical tasks related to surveying in the office and undertakes limited cartographic jobs.
• Head Tapeman - The person responsible for the accuracy and speed of all linear measurements with tape. He determines and direct the marking of stations to be occupied by the surveying instruments and direct the clearing out of obstruction along the line of site. He inspects and compares tape for standards length prior to their use in taping operations and is responsible for eliminating or reducing possible errors and mistakes in taping
• Rear Tapeman - The person whose duty is to assist the head tapeman during taping operations and in other related work
• Flagman - The person whose duty is to hold the flagpole or range pole at selected points as directed by the instrumentman.

  He helps the tapeman in making measurements, and assists the

  axeman in cutting down the branches and in clearing other

  obstruction to line of light
• Rodman - The person whose primary duty is to hold the stadia or leveling rod when sights are to be taken on it
• Pacer - person whose duty is to check all linear measurements made by tapeman. He assists the tapeman in seeing to it that mistakes and blunders in linear measurements are either reduced or eliminated
• Axeman/Lineman - The person whose duty is to clear the line of sight of trees, brush, and other obstructions in wooded country.

  He is also responsible for the security and safety of the members of the survey party at the survey site
• Aidman - The person whose duty is to render first aid treatment to

  members of the survey party who are involved in snake and

  insects bites, accidents, and other cases involving their health,

  safety, and well being. In addition, he may be designated as an assistant instrument man
• Utilitymen - The persons whose duties are to render other forms of assistance needed by the survey party or as directed by the chief of party
• Differential Leveling - operation of determining the elevation of points some distance apart by a series of set-ups of the instruments along the general route. A rod reading back to

  a point of known elevation and forward to a point of unknown

  elevation is taken for each set-up.
• Benchmark - a definite point on an object of known elevation which serves as reference for leveling work. Their elevations are established by different elevation
• Backsight - a rod reading taken at a point of known elevation and is referred to as a plus (+) sight.
• Foresight - minus (-) sight or a rod reading taken on a point the elevation of which is to be determined.
• Turning Point - a n intervening point between two bench marks upon which point foresight and backsight rod reading are taken.
• Height of Instrument - the elevation of the line of sight of the telescope above a reference datum when the instrument is set up and levelled. Elevation vertical distance above or below some arbitrary assumed level
• Elevation - vertical distance above or below some arbitrary assumed level surface or datum (usually mean sea level)
• Profile Leveling - process of determining differences in elevation

  along a fixed line at designated short measured intervals executed to provide data from which vertical section of the ground surface can be plotted. A profile is necessary for the design and construction of roads, railroads, canals, culvert,

  bridges, sewer lines, and etc.
• Profile - Curved line which graphically portrays the intersection of a vertical plane with the surface of the earth. It depicts ground elevations of selected critical points along a surveyed line and the horizontal distances between two points.
• Stationing - . A numerical designation given in terms of horizontal distance any point along a profile line is away from the starting point. Each stale used is point along a profile line is away from the starting point. Each stale used is marked with its station and plus.
• Intermediate Foresight - It is the ground rod readings which are taken along the centerline of the proposed project to provide an accurate representation of the ground surface. Intermediate foresights are observed at regular intervals and at points when sudden changes in elevation occur.
• Full Stations - . The points which are established along the profile level route at uniformly measured distances. These points are usually made in multiples of 100, 50,30,20, or 10 meters
• Plus Stations - Any other intermediate point established along a

  profile level route which is not designated as a full station. These

  points are taken at breaks in the ground surface slope and at critical points such as intended location of culverts, bridges, and other structure.
• Vertical Exaggeration - It is the process of drawing the

  vertical scale for a profile much larger than the horizontal scale in

  order to accentuate the differences in elevation
• Profile paper - A special heavy grade graphing paper used for

  plotting profiles. The paper has a horizontal and vertical lines drawn in green, blue, or orange which are spaced accordingly to represent certain distance to the horizontal and vertical scales.
• Stationing - Before levels are taken, the line along which profile is

  required must be properly marked by stakes on the ground. The choice of intervals between stakes will depend largely on the

  desired accuracy and type of terrain to be traversed
• Stationing - are used to indicate the distance of any ground stake from the beginning point of the level route. It is carried continuously
• Plotting scale - the horizontal and vertical scales used in plotting the profile should be properly identified
• Stationing - the full stations along the level route should be indicated to portray the overall linear length of the line
• Reference points - important reference points and other ground point which need to be emphasized or pointed out should be

  easily seen.
• Marginal information -any other valuable information which should explain the profile better or in detail should be

  indicated.