FUNDASURV 215: Module 1 Flashcards
Also been interchangeably called ‘geomatics’.
SURVEYING
Defined as the science, art, and technology of determining the relative positions of points above, on, or beneath the earth’s surface.
SURVEYING
regarded as that discipline which encompasses all methods for measuring and collecting information about the physical earth and our environment
SURVEYING
Has been important since the beginning of civilization
SURVEYING
Earliest applications of surveying
Measuring and marking boundaries of property ownership
One of the world’s oldest and most important arts
SURVEYING
2 Classification of Surveys
- Geodetic Survey
- Plane Survey
Difference between geodetic and plane surveys.
geodetic survey performed HIGHER ACCURACY than plane survey
Survey that covers a small part of the earth’s surface, curvature NEED NOT be take into account
Plane Survey
Survey where eath’s curvature MUST BE TAKEN considered
Geodetic Survey
13 TYPES OF SURVEY
hint: HEAR CUT CORVSSeg
- Hydrographic Survey
- Engineering Survey
- Aerial Survey
- Route Survey
- Cadastral Survey
- Underground Survey
- Topographic Survey
- Consolidation Subdivision Survey
- Original Survey
- Relocation Survey
- Verification Survey
- Subdivision Survey
- Segregation Survey
Surveys which are made of SETTING LAND BOUNDARIES on the ground and determine areas of land parcels
CADASTRAL SURVEY (Land Survey)
A survey also used for LOCATING and IDENTIFYING property lines.
CADASTRAL SURVEY (Land Survey)
A survey made for discovering the SHAPE OF THE GROUND and plotting it on a map.
TOPOGRAPHIC SURVEY
Surveys of the sites where the CONSTRUCTIONS of an engineering nature takes place.
ENGINEERING SURVEY (Construction Survey)
Surveys of LINEAR CONSTRUCTIONS: railroad, highways, canals, and others where transportation takes place.
ROUTE SURVEY
Survey for locating the working BELOW EARTH’S SURFACE as in mines, tunnels, and aqueducts.
UNDERGROUND SURVEY
Survey which utilize photographs taken from an AIRPLANE or PHOTOGRAMMETRY.
AERIAL SURVEY
Survey made for determining the shape of the bottom of LAKES, RIVERS, HARBORS, and OCEANS.
HYDROGRAPHIC SURVEY
It involves the PRECISE IDENTIFICATION OF ESTABLISHED LANDS and ITS CORNERS.
RELOCATION SURVEY
This kind of survey is to REESTABLISH THE BOUNDARIES of a tract for which a survey has previously been made.
RELOCATION SURVEY
Process where SPLITTING A TRACT of land into SMALLER PARCELS.
SUBDIVISION SURVEY (PSD)
Shows MONUMATION and SURVEY DATA on a map in conformance with local subdivision ordinance and the subdivision map act.
SUBDIVISION SURVEY (PSD)
Splitting TWO or MORE tract of land into smaller parcels.
CONSOLIDATION SUBDIVISION SURVEY (Csd)
Is a survey indicating PROPOSED property lines or parcels of land. No title, No land number.
ORIGINAL SURVEY (OS)
A survey made to ENSURE that previously surveyed boundary marks ARE NOT OUT OF POSITION.
VERIFICATION SURVEY (VS)
A survey made to SEPARATE appropriated lands from public lands.
SEGREGATION SURVEY (SGS)
It may be made DIRECTLY or INDIRECTLY
OBSERVATIONS
Examples of this observation are applying a tape to a line, fitting a protractor to an angle, or turning angle with a total station instrument.
DIRECT OBSERVATION
It is secured when it is not possible to apply a measuring instrument directly to the quantity to be observed.
INDIRECT OBSERVATION
Defined as the DIFFERENCE between the true value and the measured value of a quantity.
ERROR
IMPERFECTION OF EQUIPMENT by nature or weather effects and cannot be eliminated.
ERRORS
2 Types of Errors
- Systematic Errors
- Random Error
Also known as BIASES, result from that factors that comprise the “measuring system” and include environment, instrument and observer.
SYSTEMATIC ERRORs
Errors that tend to ACCUMULATE, they are sometimes called CUMULATIVE ERRORS.
SYSTEMATIC ERRORS
ERRORS THAT REMAIN in measured values after mistakes and systematic errors have been eliminated.
RANDOM ERRORS
Errors that sometimes called ACCIDENTAL ERRORS and are present in all surveying observations.
RANDOM ERRORS
3 Sources of Errors (PIN)
- Instrumental Errors
- Natural Errors
- Personal Errors
These errors are due to IMPERFECTION IN THE INSTRUMENT used.
INSTRUMENTAL ERRORS
These errors are caused by variation in the PHENOMENA OF NATURE.
NATURAL ERRORS
These errors are principally from limitations of the SENSES of sight, touch, and hearing.
PERSONAL ERRORS
These are INACCURACIES in measurement with carelessness, inattention, poor judgement, and improper execution of the surveyor.
MISTAKES
It is the DIFFERENCE between two observed values of the same quantity.
DISCREPANCY
It refers to the degree of REFINEMENT or CONSISTENCY of a GROUP of observations, and evaluated base on the discrepancy size.
PRECISION
It is the CLOSENESS of one measurement to another.
PRECISION
It denoted the ABSOLUTE NEARNESS of observed quantities to their true values.
ACCURACY
It is the degree of PERFECTION obtained in measurements.
ACCURACY
It is defined as the NUMBER OF TIMES something will probably occur over the range of possible occurrences.
PROBABILITY
P.S. in a muhon
Private Survey
B.L. in muhon
Bureau of Lands
A.R. in muhon
Agrarian Reform
What is the meaning of CLOA?
Certificate of Land Owership Award
Private Survey’s Muhon Size
4” diameter x 30 cm
Bureau of Land’s Muhon Size
6” diameter x 40 cm