Question

In: Civil Engineering

3. Please tell me at least one of the contact people (different layers have different names)...

3. Please tell me at least one of the contact people (different layers have different names) listed for these files as well as what federal standards they used? use Geographic Information Systems (GIS)

Solutions

Expert Solution

GIS systems have basic needs that the hardware with enough power to run the GIS software, GIS software with the capabilities you need, Accurate data in a form that can be fed into the software program and people trained to use the GIS system. GIS is often extremely useful in health and community services. It can track the spread or incidence of diseases, or of medical or social conditions.

Maps give us spatial information: they tell us where things are. They include such physical features, landscapactual places you can experience in reality – as towns and cities, main roads, and bodies of water. If the map is more complex, it may also locate mountain ranges and peaks, railroads, elevations (height above sea level, indicated either by shading or by contour lines), or other elements of the landscape.

The maps we use every day include the names of important physical and political features. The names, like political boundaries, are artificial and invisible, but they are tremendously important in making a map useful. They locate us in our world, and tell us where we are in relation to other places whose names we know.

There are other maps that many of us are exposed to. In newspapers and news magazines, on some TV shows, and especially in places like the National Geographic magazine and website we may see maps that show more than just the normal physical and political information.Some of these maps may simply show more detailed spatial information. They point the way to particular kinds of places, or tell more about the landscape than an average map might.

  The Geographic Information Framework Data Standard establishes common requirements for data exchange for seven themes of geospatial data that are of critical importance to the National Spatial Data Infrastructure (NSDI), as they are fundamental to many different Geographic Information Systems (GIS) applications. These themes are known as NSDI Framework data themes.

  Each map layer is used to display and work with a specific GIS dataset. A layer references the data stored in geodatabases, coverages, shapefiles, imagery, rasters, CAD files, and so on, rather than actually storing the geographic data. Thus, a layer always reflects the most up-to-date information in your database. A layer won't draw on your map unless you also have access to the data source on which the layer is based. There are different kinds of layers. Some layers represent a particular type of geographic feature, while others represent a particular type of data. Each layer type has different mechanisms for displaying and symbolizing its contents and specific operations that you will perform against them. Many layers have special sets of tools for working with the layer and its contents.

  

  


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