ABSTRACT
Control is a précised position of reference monument to serve as the basis for orienting or checking the result of some other working methods. Due to scarcity of controls, local origin has to be established, posing a problem for charting and subsequent adjustment into the control network. Controls are needed so as to make cadastral, engineering and other lesser survey cheaper and faster to execute. This project is therefore aim atproviding such needed Controls (3rd Order) at the Federal Polytechnic Nasarawa. The control extension which started from Loko junction in Tamah, Nasarawa in Nasarawa L.G.A. of Nasarawa state was tied to three existing government Controls (2nd Order) and closed back at the starting point. A total number of thirteen (13) controls points were established over perimeter Length of approximately 3.6km. Pro mark 3 GPS Receiver (dual frequency) was used for data acquisition. The result analysis shows that the established controls are very muchreliable. Control extension should be encouraged in area were they are notavailable in order to minimize or discourage establishment of local origin. In any community, non-availability of controls will hinder meaningful surveying operations.
CHAPTER ONE
INTRODUCTION
1.1 Background of the study
Control may be classified as an established precise position of reference monument to serve as the basis for originating or checking the result of some other working methods (C.D Ghilani & P. R Wolf, 2008). No meaningful development can succeed without adequate surveys. Also no registration of title over a landed property can be effective if cadastral surveys are not tied to controls. Such reliable controls are at present not available within the Federal Polytechnic Nasarawa premises. Hence this project was initiated by me. This project is therefore aimed at providing such needed control points (3rd Order) in this area. The establishment of these Controls will be very useful to the Department of Surveying and Geoinformatics and other practicing surveyors who might need them for various survey activities. A total number of thirteen (13) control points were established over perimeter length of approximately 3.6km. They were emplaced along walkway of major roads within the project area. The survey was tied to three identified existing government Controls (NSZ 056S, NSZ 057S and NSZ 058S) of 2nd Order accuracy and closed back at the starting point ( NSZ 058S ) The coordinate values of these controls are as shown on page 110. They were got from theMinistry of Lands and Surveys, Nasarawa state. This network of controls was designed to conform to 3rd Order standard. Pro mark 3 GPS dual frequency Receiver was used fordata acquisition.
1.2 PROJECT LOCATION
The project site is located in Tamah, Federal Polytechnic Nasarawa, Nasarawa Local Government Area of Nasarawa State. The project lies within the Nigeria TOPO sheet 208 S.W (KEFFI S.W at scale 1:50,000. The main stretch of the newly established Control network started from Loko junction in Nasarawa and terminated within the Polytechnic premises. The project location is as shown via Google satellite image on page iv.
1.3 OBJECTIVES
With the Federal Polytechnic Nasarawa sited at the out skirt of Nasarawa main town, physical development will definitely trigger off lesser survey work like cadastral and engineering surveys that are essential for social economics development. Extension of controls to this area will provide an opportunity for Surveyors to assist other allied professionals in providing a sustainable and reliable development. For such lesser survey to be meaningful for the purpose for which they are carried out, they must be tied to a main framework of controls. Also the project will provide an opportunity for the Department of Surveying and Geoinformatics, Federal Polytechnic, Nasarawa to contribute meaningfully to the physical development of the Institution. The students in the department will also have free access to use these controls for their practical assignments. This will help to boost their practical knowledge at the early stage of their survey profession. Also the coordinate values of these established controls will be made available to the Ministry of Lands and Survey Nasarawa state.
1.3 SCOPE OF WORK
The scope of work for this project includes the following:
i Reconnaissance survey
ii Baseline check using GPS receiver
iii Monumantation
iv Station description
v Connection survey
vi Station independent positioning using rapid static , post-processed relative GPS positioning method.
vii Data processing and Analysis
viii List of coordinates generated
ix Plotting and Presentation
