Objectives of the Administrative Order
- Provide comprehensive guidelines to complete the national geodetic network.
- Facilitate integration of legacy surveys and maps into PRS92.
- Ensure continuous maintenance of the national geodetic network.
Scope and Coverage
- Applies to all land surveys and mapping by government and private entities.
- Excludes nautical and aeronautical charts, which may use other reference systems.
Key Definitions
- Aeronautical and Nautical Charts: Maps designed for air and marine navigation respectively.
- Control Points: Ground points with precise geodetic positioning classified into four orders.
- Densification: Establishing additional control points to enhance network coverage.
- Geodetic Control Network: A system of control points covering broad areas.
- Geodetic Leveling, Geoid, Gravimetric Surveys, Tidal Observations: Technical terms related to geodetic measurements.
- Transformation Parameters: Numerical values linking different geodetic datums.
Positioning of Surveys
- All surveys must use permanent monuments for fixing positions.
- Philippine Plane Coordinate System (PPCS) based on PRS92 parameters remains standard.
- Continued compliance with DENR's Manual on Land Surveying Regulations.
Geodetic Control Network Design and Establishment
- Primary network comprises first and second order control points spaced at 50km and 10-25km.
- Secondary network includes third and fourth order points, ensuring at least two control points per barangay.
- Existing survey monuments integrated after re-surveying or conversion to PRS92 standards.
- CGSD-NAMRIA manages the primary network; RSD-LMS handles secondary network.
- Densification targeted for completion by 2010.
Control Points Established by Other Agencies and Private Surveyors
- Other government and private entities may establish control points if accuracy standards are met.
- An incentive system to encourage participation is to be established.
Monument Specifications and Markings
- Control point monuments are concrete structures with dimensions tied to their order of accuracy.
- Alternative marking on permanent structures or natural features allowed.
- Markings and numbering follow prescribed standards, with "PRS92" designation for integrated points.
Transformation Parameters and Coordinate Conversion
- Existing parameters for converting WGS84 to PRS92 and vice versa remain valid pending new research.
- Future local or zonal transformation parameters will be developed and adopted.
Connection Surveys
- Additional control points may be requested or established by geodetic engineers following prescribed procedures.
- Resulting data reviewed for inclusion in the national network.
Maintenance and Recovery of Control Points
- Inventory and information exchange between LMB/LMS and CGSD-NAMRIA is mandated.
- Recovery and connection activities extend to political boundary monuments and cadastral stations.
- Submission of Location Monument Recovery Reports for survey outputs is required.
- Private practitioners also allowed to recover control points if accuracy standards are met.
Protection and Penalties
- LMS and NAMRIA charged with preservation efforts, coordinating with LGUs and stakeholders.
- Geodetic Engineers have a professional duty to protect monuments.
- Penalties apply for intentional damage or destruction under existing laws.
GPS Equipment Testing and Data Evaluation
- GPS receivers must be tested, certified every three years, and registered with LMB.
- Survey data must include raw data, field sheets, control descriptions, and equipment details for verification.
- CGSD-NAMRIA currently evaluates GPS data; after three years, LMB/LMS will assume responsibility for lower-order networks.
Geodetic Network Information System (GNIS)
- Development of a centralized system to manage geodetic data, provide analysis, reporting, and secure access.
- NAMRIA in coordination with LMB and LMS responsible for operation and maintenance.
- Publication of national reference materials and manuals included.
Integration of Surveys and Maps to PRS92
- All new surveys and maps must refer to PRS92.
- Integration of older surveys contingent upon approved transformation parameters.
- NAMRIA to pilot integration and prepare procedural manuals.
- LMS responsible for preparing control maps covering various land classification and tenurial categories.
Upgrading the National Geodetic Network
- Research to define optimal geoid models, datums, and reference ellipsoids.
- Collaboration on geodetic leveling, tidal observations, gravity surveys, and crustal studies.
- Legal and policy research for necessary adjustments with PRS92 adoption.
- Re-establishment of national leveling networks along major highways.
- Promotion of active geodetic stations and supporting data centers.
Information, Communication, Education, and Capability Building (ICE)
- Conduct ICE activities to build awareness and expertise in geodesy.
- Strategies include campaigns, professional education, partnerships, and technology transfers.
- Documentation of ICE models for dissemination and reference.
Implementation Arrangements
- Creation of a Program Steering Committee (PSC) chaired by DENR Undersecretary for Lands for overall PRS92 management.
- PSC empowered to set policies, approve plans, and manage budgets.
- Establishment of Technical Working Group for policy formulation and coordination.
- National Secretariat to provide administrative and technical support.
- Regional Operations Committees in each region to manage operational policies and coordinate survey teams.
- Coordination mandated with other government agencies and private practitioners for compliance and technical support.
Miscellaneous Provisions
- Separability clause safeguarding validity if parts are invalidated.
- Repeal of inconsistent previous orders and regulations.
- Effectivity upon registration with the Office of the National Administrative Register and newspaper publication.