01.08.2021 Views

Introduction to Human Geography (2nd Edition), 2019a

Introduction to Human Geography (2nd Edition), 2019a

Introduction to Human Geography (2nd Edition), 2019a

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

INTRODUCTION TO HUMAN GEOGRAPHY<br />

INTRODUCTION TO GEOGRAPHY<br />

Digital imagery like the one in Figure 1.9 is in a format that can be entered in<strong>to</strong><br />

Geographic Information Systems (GIS), the second important <strong>to</strong>ol employed<br />

by geographers. GIS combines computer hardware and software in a system that<br />

s<strong>to</strong>res, analyzes and displays geographic data with a “computer mapping” capability.<br />

Geographic data is s<strong>to</strong>red in layers, and these layers of data can be queried in a<br />

Figure 1.11 Each<br />

data point in a GIS is georeferenced <strong>to</strong><br />

a precise location on the Earth’s surface<br />

<br />

<br />

attributes corresponding <strong>to</strong> the data<br />

layer they are associated with. Data<br />

layers can represent a myriad of characteristics<br />

about that data point, such<br />

as elevation, soils, the presence of<br />

water, per-capita income, ethnicity,<br />

etc. Overlaying the data layers can<br />

provide incredible insights in<strong>to</strong> the<br />

connections between characteristics/<br />

fac<strong>to</strong>rs in places, such as the connection<br />

between per-capita income and<br />

Figure 1.11 | Data Layers<br />

Data layers in a Geographic Information System (GIS).<br />

ethnicity or the links between soil types<br />

Author |<br />

and vegetative cover. GIS also has a Source | National Geographic<br />

License | Public Domain<br />

vast suite of other capabilities such as<br />

least-cost path for transportation, lineof-sight<br />

perspectives from a particular<br />

location, or 3-D models of urban areas.<br />

Because of their multi-faceted capacity<br />

<strong>to</strong> present geographic information,<br />

businesses and government agencies<br />

around the world use GIS <strong>to</strong> answer<br />

questions, plan development, chart<br />

delivery routes, and even moni<strong>to</strong>r<br />

<br />

Figure 1.12<br />

one of the fastest growing job markets<br />

is in GIS technology, as GIS jobs exist<br />

at the local, state, and national level as<br />

well as in many businesses in the<br />

private sec<strong>to</strong>r. Even the U.S. Census<br />

Bureau maintains an extensive GIS<br />

Figure 1.12 | Crime Analysis<br />

A crime analysis of Washing<strong>to</strong>n DC.<br />

database known as Topologically<br />

Author | User “Aude”<br />

Integrated Geographic Encoding and Source | Wikimedia Commons<br />

License | CC BY SA 2.5<br />

<br />

Page | 11

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!