2.8 IMPORTANCE OF MAPS IN GENERAL Maps are one of the most important tools researchers, cartographers, tourists, students, and others can use to examine the entire earth or a specific part of it. In simple terms, maps are pictures of the earth’s surface. They can be used as a general reference to show landforms, political boundaries, water bodies, and the position of cities. 14 Charles.C.Maiyo
A map gives a minute depiction of a very large space. It acts as a guide in places which we have never visited before. They give us the distance in two places, mountains, rivers, railway station, airport, and shapes of places or destinations.With a map, one does not have to depend on anybody for local directions. It acts as a direction finder for a very small price.Different types of maps can show us a plethora of information existing on earth. 2.9 GIS Definition Geographic Information System is a system comprised of a complex array of data resources, applications integrations, and analytical spatial algorithms managed by a team of skilled professionals whose systems can provide the answers to nearly any complex spatial question. Components of GIS A working GIS integrates five key components: hardware, software, data, people, and methods. i. Hardware Hardware is the computer on which a GIS operates. Today, GIS software runs on a wide range of hardware types, from centralized computer servers to desktop computers used in stand-alone or networked configurations. ii. Software GIS software provides the functions and tools needed to store, analyze, and display geographic information. Key software components are: Tools for the input and manipulation of geographic information A database management system (DBMS) Tools that support geographic query, analysis, and visualization A graphical user interface (GUI) for easy access to tools 15 Charles.C.Maiyo
iii. Data Possibly the most important component of a GIS is the data. Geographic data and related tabular data can be collected in-house or purchased from a commercial data provider. A GIS will integrate spatial data with other data resources and can even use a DBMS, used by most organizations to organize and maintain their data, to manage spatial data. iv. People GIS technology is of limited value without the people who manage the system and develop plans for applying it to real-world problems. GIS users range from technical specialists who design and maintain the system to those who use it to help them perform their everyday work. v. Methods A successful GIS operates according to a well-designed plan and business rules, which are the models and operating practices unique to each organization. 2.9.1 GEODATABASES The geodatabase is the native data storage and data management framework for ArcGIS. Why would you want to use a geodatabase? Because it acts as an organizational tool to store and manage your data and is also the gateway into advanced GIS capabilities. Geodatabase is a container which houses a collection of various geographic datasets.Geodatabases support all of
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- Spring '16
- prof. Maximillan tumbo