Presentation on theme: "POWER POINT PRESENTED BY DANGOUMBA FRANCOIS CIVIL ENGINEER LAND SURVEYOR, EXPERT ON REMOTE SENSING AND GIS YAOUNDE CAMEROUN- AFRICA"— Presentation transcript:
POWER POINT PRESENTED BY DANGOUMBA FRANCOIS CIVIL ENGINEER LAND SURVEYOR, EXPERT ON REMOTE SENSING AND GIS YAOUNDE CAMEROUN- AFRICA E-MAIL: ddangfranc@hotmail. fr/ firstname.lastname@example.org ddangfranc@hotmail. email@example.com ANNUAL WORLD BANK CONFERENCE ON LAND AND POVERTY WASHINGTON DC, MARCH 23- 27, 2015 THEME: THE USE OF GEOSPATIAL TECHNOLOGIES (SATELLITE IMAGES) IN THE LAND SURVEY OF EVER- EXPANDING AFRICAN TOWNS.
1. INTRODUCTION 2. CONTEXT AND OBJECTIVES OF THE PAPER 3. OVERVIEW OF TWO LAND SYSTEMS IN AFRICA 4. THE ISSUES OF SATELLITE IMAGES 5. WHY SHOULD WE USE SATELLITE IMAGES IN THE LAND USE SURVEY? 6. INTRODUCING SATTELITE IMAGES DATA IN THE GEOGRAPHIC INFORMATION SYSTEM (GIS) 7. CONCLUSION TABLE OF CONTENTS
INTRODUCTION AND CONTEXT Management of urban space is a crucial factor for the well being of the people living there; this space management requires accurate knowledge of how the occupation and organization of the environment. The integration of satellite images to this organization of space allows to update supports mapping and cadastral documents for a comprehensive inventory of the state of land property. Expected Results: enable decision makers to have a management system and requests updated urban data, and update files taxpayers through a key plan 1. INTRODUCTION
CONTEXT: Decision makers do not have an updated system for the management of urban data and land use. OBJECTIVES: Ensuring financial resources for local authorities Guaranteeing land fees Ensuring the development and equipment of towns Ensuring the governance land properties 2.CONTEXT AND OBJECTIVES OF THE PAPER
LAND TENURE IN GABON In Gabon, the land is the property of the state whose role is to split and distribute the land through the relevant services; -The procedure for awarding urban land property devolves on the General cadastre Department; thus all land stains are forwarded to this institution. LAND TENURE IN CAMEROUN In Cameroon, the state is the keeper of land. It guarantees the right of any natural person of corporate body that owns a land to enjoy and use it. There are three categories of property: - State private property - Individual private property - National property 3. OVERVIEW OF TWO LAND SYSTEMS IN AFRICA
2-1/ COMPARING THE TWO LAND SYSTEMS In Cameroon, to obtain a land permit one must go through the registration land which consists in submitting a file to the relevant senior divisional officer. In Gabon, the registration process differs from urban to rural areas. In urban areas for instance, the application for a land permit must be forwarded to the cadastre services. In Cameroon and Gabon, privates do not own sub soils which are considered as State’s property. Elsewhere, and in the USA specifically, privates do own soils and sub soils. 3. OVERVIEW OF TWO LAND SYSTEMS IN AFRICA
The traditional methods used the conduct of land surveys were long and expensive because of the old process of making cartography. Yet, it is essential to have an accurate knowledge of the land for a sound management of the space. The question to be asked is the following: Is the use of satellite images a key factor for the updating of survey data? 4. THE ISSUES OF SATELLITE IMAGES.
Satellite images are color or black images that are obtained by digitizing or projecting air pictures. -For a prompt updating of cartographic data -For monitoring the urban array - For a survey of land ownership. 5. WHY SHOULD WE USE SATELLITE IMAGES?
5.1 ADVANTAGES OF SATELLITE IMAGES They give accurate information on the topography of the plot They help update cartographic data They help fill the gaps on pioneer fringes of big cities They help trace the urban array because of the quality of their metrics They help put in place an addressing system. 5. WHY SHOULD WE USE SATELLITE IMAGES?
5.2 SHORTCOMINGS OF SATELLITE IMAGES -They cannot replace the fragmented plan -They cannot replace the boundaries of unseen plots -They cannot replace field works. 5. WHY SHOULD WE USE SATELLITE IMAGES?
DATA Satellite images of Port-Gentil ( 1998) Cadastral plots PROCESS : GEOREFERENCING: Plot superimposition on satellite images - Projection: Local cadastre Structuring of the database. – Ellipsoid : GRS 80-WGS 84 6. INTRODUCING SATTELITE IMAGES DATA IN THE GIS)
DATA Satellite images of Port-Gentil ( 1998) Cadastral plots
Satellite images help to make a comprehensive inventory of plots, and sugar cane forms for agro- industries Satellite images help to trace the development of cultivated areas and expansion of the urban array Satellite images aim at controlling the reduction in agricultural land, and at boosting productivity Satellite images are effective tools that contribute to urban development Satellite images can be used survey maps for network distributors ( water and electricity) 7.CONCLUSION