Gis ppt download

Elizabeth Howell. GIS presentation 1. Principle Of GIS. Function Of GIS. Components Of GIS. Type Of GIS. Advantages Of GIS. Applications Of GIS. Principle Data Capture Data sources are mainly obtained from manual digitization and scanning of aerial photographs, paper maps, and existing digital data sets.

Database Management and Update data security, data integrity, and data storage and retrieval, and data maintenance abilities Geographic Analysis The collected information is analyzed and interpreted qualitatively and quantitatively. Preparing Result One of the most exciting aspects of GIS technology is the variety of different ways in which the information can be presented.

For example, aerial photography, scanning, digitizing, GPS or global positioning system is just a few of the ways a GIS user could obtain data. Data Storage Some data is stored such as a map in a drawer, while others, such as digital data, can be as a hardcopy, stored on CD or on your hard drive. Data Manipulation The digital geographical data can be edited, this allows for many attribute to be added, edited, or deleted to the specification of the project. We use population data to help establish an equal representation of population to area for each district.

Visualization This represents the ability to display your data, your maps, and information. The software available can be said to be application specific. Data A GIS will integrate spatial data with other data resources and can even use a DBMS, used by most organization to maintain their data, to manage spatial data. Geographic data and related tabular data can be collected in-house or purchased from a commercial data provider.

People GIS users range from technical specialists who design and maintain. Method The map creation can either be automated raster to vector creator or it can be manually victories using the scanned images. Vector Points, lines, polygons More closely resembles real world 8 9. Raster VS Vector 10 Advantages Vector Good Representation of data. D, GISP nick drexel.

Rich Teerlink, former Chairman of Harley-Davidson. Currently uses Mapserver as rendering engine Package of modules for rendering GIS data. Modeling our World: The Geographic Information Systems A database system in which the organizing principle is Get to know more about GIS software here. GIS - Topics to be Covered. An overview of GIS history, definitions. Topics to be Covered. Kirk A. Internet Explorer.

In short, a geobrowser can be understood as an Internet Explorer for geographic information. Like the internet it allows the combination of many types of geographic data from many different sources. The biggest difference between the World Wide Web and the geographic web however is that everything within the latter is spatially referenced.

Their functionality is limited compared to software stored on your computer, but they are user-friendly and particularly useful as they not required data download. Maps can be assembled in different formats and for different uses. QGIS cont.

Raster often look pixilated because each pixel is associated with a value or class. But it depends on the cell size for spatial accuracy. In GIS terminology, real-world features are called spatial entities. Many of the features in QGIS are actually implemented as either core or external plugins. They are stored in external repositories and maintained by the individual authors. While it is very useful to have a projection file, it is not mandatory. A shapefile dataset can contain additional files.

The degree of resolution available is based somewhat on the points of interest and popularity, but most land is covered in at least 15 meters of resolution.

KML or. KMZ extension. This sometimes does not hold true for KMZ. Compare characteristics of places. Differentiate between vector and raster data. Describe two common data models used to represent real-world objects and phenomena in a GIS. The above is all the links about fundamentals of gis ppt, if you have a better answer, please leave a message below. Save my name, email, and website in this browser for the next time I comment.