Isolated Surveys (DMC 2010-13)

Isolated Surveys

_______ shall be comprised of all classes of surveys of isolated parcels of land used for agricultural, residential, commercial, resettlement, or other purposes covering areas not more than 1,500 hectares

GNSS Observation

(Gss/Ts)

Determination of position of the lot's boundary from an established reference point shall be conducted using

If area is at least 1,500 hectares:

ETS;

have the option to use GNSS receivers.

(Gss/Ts)

Determination of position of the lot's boundary from an established reference point shall be conducted using

If area is below 1,500 hectares:

500 meters;

100 meters

(Isolated Survey Accuracy)

length of side shots from the traverse station to the lot corners shall not exceed ______ when using ETS or EDM and _______ when using steel tapes

Tie Line

shall be a straight line with known bearing and distance expressed in degrees, minutes and seconds computed based on the position of corner 1 of the lot from an established reference monument

DENR official

The survey of public land shall be conducted upon issuance of survey authority or survey order from the concerned

twenty (20) meters

Buffer zone of at least _______ shall be maintained along the edge of the reclaimed land between the waterline and the sub-lots

Foreshore lands

_________ shall be surveyed upon determination of the average highest and lowest level of the sea water in the area based on the published tide table from NAMRIA.

Private Land Surveys

shall either be a simple or complex subdivision survey pursuant to BP 220 and PD 957

isolated survey

Survey of National Government lands shall be treated as

Conversion Surveys

Survey for the purpose of transforming/converting individual lots covered by approved graphical cadastral survey, cadastral mapping (Cadm), and photocadastral mapping (PCadm)

Regional Technical Director

The ________ for Lands may issue order to conduct a verification survey whenever any approved survey is reported to be erroneous, or when titled lands are reported to overlap or where occupancy is reported to encroach another property

Isolated Surveys

Under _______ are:

a.) Public Land Subdivision

b.) Group Settlement Survey/ Townsite Subdivision Survey

c.) Survey of Public Lands

d.) Amendment Surveys

e.) Private Land Surveys

f.) Government Land Surveys Article

g.) Conversion Surveys

h.) Other Land Surveys

i.) Mineral Land Surveys

j.) Forestlands and National Parks/Protected Areas k.) Delimitation Survey

DENR-LMS Regional Office;

Verification Surveys (Vs)

All survey work undertaken for verification purposes shall be subject of verification and approval in the concerned and shall be designated as _________

above

The original survey symbol and number of the lot shall be stated immediately ________ the Vs survey symbol and number. This shall apply to verification surveys of isolated surveys and cadastral lots.

astronomical observation

In order to determine the original position of corner 1 and other selected corners of an old survey not approved in the system of PRS92, an _____________ shall be conducted

Almanac

To determine the time of astronomical observations previously conducted over the old point. This verification with the aid of ________, shall also determine what celestial bodies were observed during the astronomical observation.

sun (solar observation);

star (stellar observation)

Astronomical observation shall be made on either the __________ or the _________, as the geodetic engineer may prefer

stellar

Old azimuth between BLLM Nos. 1 to 2 shall be checked through _______ observation

index error, refraction and parallax

All observed altitude of the sun shall be corrected for _______, _________ and ________ in the order given

index error

refraction

Only correction _________ for _______ and shall be applied to observed altitude of the star.

lower or upper limb

vertical angle observed

The altitude of the sun's center shall be determined by observing its ____ or ____ and correcting the __________

Add; lower limb

subtract; upper limb

______ its angular semi-diameter when observing ______ or ______ its angular semi-diameter when observing ______

direct;

reversed;

direct

Center the sun's disc in the solar circle or square which shall be taken first with the telescope _______, then twice with the telescope _______ and finally with the telescope ______

local apparent time;

mean time;

standard time

To compute the standard time during solar observation

Observing for _______, converting it into _____ and finally reducing to ______.

direct; reversed

The index error of the vertical circle shall be determined by _____ and _____ sighting at a fixed point

ten; ten

The average of at least _____ direct and ____ reversed readings on as many points of different elevations shall be used for determining the index error.

index error

The observed vertical angles shall be corrected by the amount of the _______

index correction

The value of the _______ shall be entered with the data for each solar observation.

twenty degrees

Observation shall be taken when the altitude is not less than _______

thirty seconds of arc

If the direct and reversed readings of the vertical angles to a point after correcting for index error, differ by more than _________ , the instrument shall be tested and adjusted accordingly.

prime vertical

Observations on celestial bodies shall be made when the observed body is on the _____

meridian

If this is not possible, observations can be made along the _______ but this should not be done over BLLM Nos. 1 and 2.

one hundred twentieth degree (120º)

The official or standard time to be used in astronomical observation shall be the mean time corresponding to the _______ meridian east of Greenwich.

altitude observation

Local mean time shall be determined by _______ on the sun or stars at the moment of meridian passage or at any hour angle

chronometers

Geodetic engineers shall use accurate watches or __________ for astronomical observations.

local apparent time

The time obtained by observations on the sun is _______ which shall be transformed into local mean time

Equation of Time

_________ = Apparent Time - Local Mean Time

local sidereal time

Time obtained by observation on the star is _______ which shall be transformed into local mean time

two

At least _____ complete sets of observations shall be made

latitude

Observation for _______ shall be made whenever the latitude of the station occupied is not known from previous observations or from connection to a station or point of reference of known latitude

Longitude

The _______ shall be determined by means of closed circuit or loop traverse starting from reference points of known geographic positions

eight (8)

Observations on the sun shall consist of a series of not less than _______ altitude observations alternately with the transit or theodolite in the direct and the reversed positions.

before the time; after the time

Half of the series shall be made ______ of the meridian passage and the other half _____ of meridian passage

polaris at culmination

When more accurate result is desired, the latitude shall be determined by observation of _______

Elevation

The _______ may be determined by lines of levels starting from bench marks of known elevation, by trigonometric leveling, spirit leveling or by means of barometer/altimeter

south as zero direction; clock wise of the quadrants

The azimuths of all lines of survey lines shall be reckoned from the _________ following _______

twenty (20) percent or less

Segregation survey (Sgs) are surveys for the purpose of segregating _________ of the area of previously surveyed large tract of public land.

dash lines

(Sgs)

The portion of the mother lot which can be shown on the isolated survey plan shall be plotted in ______

highest; original

Segregated lot shall be assigned the ______ cadastral lot number while the remaining portion thereof shall retain the _________ cadastral lot number

Relocation Survey

The relocation of corners or re-setting of boundary lines of approved surveys using the bearings, distances, and the area

Resurvey (Rs)

Survey made on approved survey under the following circumstances:

1.) For purposes of inscribing the technical description on the title of a tract of land and whose technical description is no longer available in the Lands Management Bureau/Land Management Services or the Land Registration Authority.

2.) For purposes of transforming the previously titled lot covered by magnetic survey into numerical survey.

3.) For purposes of establishing the technical description of approved survey which is missing as certified by LMB and LMS office concerned

BLLM No. 1

The elevation of all primary and secondary control station and of the political boundary monuments shall be determined by leveling starting from and closing at the _____ of the municipality or project

Special Surveys

Surveys for geographic and scientific investigations, experiments and all other surveys. This shall be designated as "Special Work Order" (Swo) which cannot be a subject of titling and must be clearly stated on the plan.

mineral land survey

The conduct of ________ shall be in accordance with the procedures and standards set by the Mines and Geosciences Bureau

Forestlands and National Parks/Protected Areas Delimitation Survey

The conduct of the survey shall only proceed after the enactment of the corresponding law by Congress adopting the final report of the Regional Assessment and Delineation Team (RADT) as a result of their assessment/delineation of forestland boundary

two (2)

The Survey Party tasked to conduct the survey shall be composed of Geodetic Engineers of the Field Network Survey Party (LMS), at least ______ members of the RADT (FMS) and a representative of NAMRIA.

Forestland, National Parks, Agricultural Land Boundary Map

(FNPABM)

Regional Assessment and Delineation Team

(RADT)

4th Order

The FNPABM shall serve as a reference to the Survey Party in the conduct of delimitation survey of Forest Boundary lines. The survey shall be at least in the ______ Accuracy