1 / 15

Introduction-Overview

Introduction-Overview. Why use a GIS? What can a GIS do? How does a GIS work? GIS definitions _. Why use a GIS?. An extension of the paper map, but much more than a map, as you will see. GIS uses the analytical power of the computer to complete complex tasks.

ruck
Télécharger la présentation

Introduction-Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction-Overview • Why use a GIS? • What can a GIS do? • How does a GIS work? • GIS definitions_

  2. Why use a GIS? • An extension of the paper map, but much more than a map, as you will see. • GIS uses the analytical power of the computer to complete complex tasks. • Computer's storage power to manage large data sets. • Integration of many different types of data from many different sources. • GIS maps a variety of different data to the same coordinate space (combination). • More media stable than paper media, and easier to distribute via the net. • Faster and easier update. • Creation and use of "one-time" maps. • Tailor-made maps. • Elimination of some user bias. • GIS brings new tools for thinking differently about geographic data._

  3. What can a GIS do? • Locate geographic features based on properties. • Identify and analyze properties of geographic features based on location. • Estimate economic effects of land-use regulation. • Determine the optimal locations of new businesses. • Generate optimal routing and scheduling delivery and repair services. • Determine the ground area covered by a new cellular phone network. • Delineate watershed boundaries. • Predict vegetation types based on elevation, slope, and aspect. • Predict landslide hazard for harvest units. • Epidemeology. • Locate natural areas that need protection. • Make colorful and interesting maps._

  4. Examples of what a GIS can do • Example 1: Where is a given feature or set of features? Where are forest stands greater than 100 years of age?

  5. Examples of what a GIS can do • Example 2: What features are at a given location? • What is the age of the forest near the 1050 Road?

  6. Examples of what a GIS can do • Example 3: Where are areas that meet a given complex set of criteria? What parts of the forest are located: • closer than 100 ft to a stream, and • farther than 50 ft from a road, • on > 30% slope?

  7. Examples of what a GIS can do • Example 4: How can operation costs be calculated with a GIS? • What is the average yarding distance for each stand in the forest?

  8. Examples of what a GIS can do • Example 5: How can watershed analysis data be generated within a GIS? • What are the road and stream densities (mi / sq. mi) for the forest area?

  9. Examples of GIS maps topographic mapping

  10. Examples of GIS maps orthophoto image maps

  11. Examples of GIS maps surface drapes & 3-D modeling

  12. Examples of GIS maps classified thematic mapping

  13. Examples of GIS maps research documentation

  14. coordinate data each feature has a record tabular data How does GIS work? • Combination of and

  15. hardware, • software, • data, • people, and • methods GIS definitions • "A system of hardware, software, and procedures designed to support the capture, management, manipulation, analysis, modeling and display of spatially-referenced data for solving complex planning and management problems." • A working GIS integrates five key components:

More Related