DENR Survey Standards and Procedures 1990

Covers extensive land areas including timberland, classified Agricultural and Development (A & D) lands, political boundaries, and individual lots.
Conducted according to the Manual for Land Surveys in the Philippines (Lands Administrative Order No. 4, July 3, 1980) and latest instructions to bidders unless superseded.

Perimeter surveys must follow precision and standards using calibrated and registered instruments.
ISF surveys are concurrent with cadastral projects and projected on cadastral or social forestry maps.
Perimeter surveys are based on sketches by the Land Evaluation and Survey Team with Forestry Officer guidance.
Surveys tied to known reference points via tertiary precision circuit or loop traverse; Electronic Distance Measurement (EDM) equipment must undergo regular calibration.
Boundary corners marked by concrete monuments or "X" marks on natural immovable features.
Parcels within ISF areas surveyed using instruments of lesser precision like tachimetry or stadia methods.
Social Forestry Maps are either isolated plans verified by the Chief, Regional Surveys Division, or overlays on cadastral maps labeled as SFM.

Include surveys for quarry applications, mining claims, coal, petroleum, and related mineral lands.
Executed like isolated surveys tied to known reference points using calibrated instruments like transit and electronic theodolites.
Surveys plotted on isolated survey plan forms with appropriate symbols.
Previously approved surveys depicted in dashed lines for context.
Mineral land survey returns submitted through Mines and Geo-Sciences Sector for verification and approval, marked "Not for Registration in Court."

Delimitation of classified forests requires tertiary precision surveys using Forestry Transits and prescribed tapes.
Use of photo maps or aerial photographs allowed to guide delimitation.
Boundaries marked by concrete markers or natural landmarks when concrete placement is impracticable.
Delimitation results plotted on Land Classification Maps managed by NAMRIA.
Forest Management Sector responsible for land use and capability surveys.

Photogrammetric and satellite surveying methods may be approved by the Lands Management Bureau as alternate or supplemental survey techniques.

Responsibility of NAMRIA to establish first, second, and third order geodetic control network points.

Tasked with densifying NAMRIA's geodetic control points to support cadastral surveys.
Responsible for updating location and boundary monuments to Global Positioning System (GPS) standards for integration into cadastral mapping.
FNSP placed under direct administrative control of the Regional Executive Director (RED) with technical guidance from the Surveys Division.

Designates specific agencies responsible for production, updating, maintenance, and issuance of particular maps.
Ensures uniform symbology for common features such as roads and bridges, matching that in topographic maps.
Map types include cadastral, municipal boundary, isolated survey plans (Lands Service); geologic, mineral land survey, mineral rights master maps (Mines Service); social forestry and forest license maps (Forestry Service); and land classification maps (NAMRIA).
Specifies map sizes and scales, including adoption of transverse mercator projection and Philippine Plane Coordinate System (PPCS) for various scales.
Maps outside agency jurisdiction considered unofficial.

Enforced as of August 13, 1990, to ensure compliance with standardized survey methodologies supporting land administration and resource management in the Philippines.