Geographical Information System (GIS)

Definition - What does Geographical Information System (GIS) mean?

A geographical information system (GIS) is a computer system used to record, check, manipulate, and display data related to positions on the earth’s surface. GIS systems allow many different forms of data to be overlaid on one map. This makes it easy to analyze patterns and relationships between different systems. The use of GIS is not limited to trenchless technology applications; GIS has proved useful in studies related to pollution, population, income, education level and location of institutions, and vegetation. GIS can also be an effective way to visualize the relationship between seemingly unrelated information and systems.

Trenchlesspedia explains Geographical Information System (GIS)

There are a range of GIS on the market, most of which require additional development to allow specialized data analysis. Still, with accurate data and a large database, GIS can be incredibly useful because of the amount of data it can effectively display - like size, material, and year the utility service was laid - in an easy-to-analyze geospatial format. There are many different ways in which a location can be expressed, such as latitude, longitude, zip code, or even address.

You have used a GIS system if you have ever used Google Maps to view satellite images of the earth or overlay traffic information.

Putting information into a geographical information system can be as easy as uploading data from satellites or other digital formats. Otherwise, it is necessary to manually scan maps or convert information into a digital format that the GIS can read. One of the key features of a GIS is their ability to scale and align various sources so they can be simultaneously displayed.

In trenchless technology, this computer mapping technique is able to be applied to subsurface public utility networks so technicians can have the most up-to-date and accurate geographic data with them when they go into the field.

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