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Geodetic Network Designations and Control Survey Classes

Learn about the different orders and distances for Geodetic Networks, including 1st, 2nd, 3rd, and 4th order classifications. Understand the requirements for establishing control points based on the distance criteria.

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Questions and Answers

What is the accuracy standard for 4th Order geodetic control in terms of linear error?

10 cm/km

In the context of geodetic control, what is the spacing of stations for secondary traverse?

100 to 500m

What is the primary method recommended for conducting control survey using ETS surveying instruments?

Both Traverse and Triangulation

What is the relative error standard for 3rd Order geodetic control?

<p>1/20,000</p> Signup and view all the answers

Which specification indicates that the angular error in a traverse should not exceed 30 seconds?

<p>Secondary Traverse</p> Signup and view all the answers

What is the distance requirement for a 1st Order control survey?

<p>50 kilometers</p> Signup and view all the answers

For a Secondary Geodetic Network, what is the distance requirement for a 3rd Order control survey?

<p>5 kilometers</p> Signup and view all the answers

Why should swampy or loose soil areas be avoided in the preparation of the map of a project site?

<p>They may affect the stability of control points</p> Signup and view all the answers

What is the purpose of numbering each station in a Network Design for control surveys?

<p>To keep track of them during field reconnaissance</p> Signup and view all the answers

What role does the NAMRIA Topographic Map play in the preparation of a project site map?

<p>It serves as the base map</p> Signup and view all the answers

Why is it necessary to plot all fixed controls based on available records in the preparation of a map?

<p>To ensure they are not affected by construction activities</p> Signup and view all the answers

What should be shown on the project site map according to the text?

<p>Estimated number of control points</p> Signup and view all the answers

Who should be notified in writing before the conduct of the survey?

<p>City or Municipal Mayor</p> Signup and view all the answers

Where should the conduct of the survey start from?

<p>Established PRS 92 control point</p> Signup and view all the answers

Which office does NOT need to be notified before conducting the survey?

<p>Local Fire Department</p> Signup and view all the answers

What must the baseline length for the Primary Geodetic Network be in accordance with?

<p>Nominal space as provided in DA0 2007-29</p> Signup and view all the answers

Who should conduct the proposed leveling measurement activities if NAMRIA has no available data for the area?

<p>National Mapping and Resource Information Authority (NAMRIA)</p> Signup and view all the answers

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