The boundary sketch of the project site is plotted on an appropriate scale using available NAMRIA Topographic Map to be used as the base map for the Geodetic Network Design. Which source is used?

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For geodetic network design, you need a base map that provides accurate geometry, a consistent scale, and a reliable coordinate framework. The NAMRIA Topographic Map serves this purpose because it is the official national topographic product with standardized scales, grid reference systems, and known control points that surveyors can use to plot boundary sketches precisely. It ensures that measurements and orientations align with the national coordinate system, which is essential for designing and tying the geodetic network.

Satellite imagery can help identify features but it lacks guaranteed scale, coordinate accuracy, and a consistent reference framework needed for network design. Historical land use maps and urban development plans offer valuable thematic information but are not suitable as precise base maps for surveying geometry, as they may be outdated or not tied to the correct coordinates.