Chapter 8. GIS software. Introduction. Chapter 1 : four technical parts of GIS(network , hardware , software , database ) . This chapter 8 : concerned with GIS software , the geoprocessing engine of a complete , working GIS .
(GIS software packages aim to provide a unified approach to working with geographic information )
1- foundation of a computer operating system – the instruction set that controls all the activities of a computer .
2- capabilities to provide a controlled environment for geographic information management , analysis and interpretation .
3- support for geographic data types and processing capabilities to facilitate geographic information science .
1- command line interfaces were supplemented and eventually replaced by ( GUIs ) .
2- a customization capability was added to allow specific-purpose applications to be created from the generic toolboxes .
1- planning information systems .
2- AM / FM .
3- land information system .
This type of computing architecture is usually referred to as client-server because clients request data or processing services from servers that perform work to satisfy client requests.
GIS software system:are built released as GIS S.W products by GIS- vendor soft development and product teams:
Key of GIS Software system:
*Tools, data manager
The key GIS software components deal with user application, tools and data access.
Example of components:
It have been purchased and licensed for use in GIS software system (Arc view GIS, Microsoft visual Basic)
*The key GIS software component deals with user applications, tools, and data access.*A key GIS implementation issue is whether to buy a system or to build one, increasingly users prefer to buy complete system.
Modern GIS software system has three types of components:*User applications ( locate data, make, maps, geocode) *Geographic tools *Data access The main data access:*Vector *Raster*Spatial reference *Data manager
1 Sub system are responsible
2 Low level manipulation
1 Coordinate transformation
2 Map projection
1 Responsible for storing geographic objects
2 Provide sophisticated service
Example of professional GIS software:
*Cost is 1000-2000 for the
developer kit and 100 per
Internet GIS application
Others types of GIS software
*Raster based CAD based
and GIS application servers are
also important types of GIS software