Geoscience Reference
In-Depth Information
Figure 6.14 Mapplet of Varroa mite diffusion. Source: Arlinghaus, S. L. (from input
from D. Sammataro). 2000. Animaps IV: Of Time and Place, Solstice: An Electronic
Journal of Geography and Mathematics, Volume XI, No. 1. Ann Arbor: Institute of
Mathematical Geography. http://www-personal.umich.edu/~copyrght/image/solstice/
sum00/animapsiv.html.
6.6 Practice using selected concepts from this chapter
6.6.1 Investigate classification using ArcGIS online
In this activity, you will use web-based GIS to investigate classification. The
objectives of this activity are to: Understand and use different classification
methods; understand how classification is related to data; make maps using
different classification methods; understand how and why those methods dif-
fer, and use them in conjunction with classification (standard notation, mean,
standard deviation).
Start a web browser and access ArcGIS Online ( www.arcgis.com/home ).
In the search box, search for “Oklahoma 1900 to 2010 Population Change
owner:jjkerski,” and open it with the ArcGIS Online map viewer. If while
opening the map, you are prompted to use ArcGIS Explorer Online, decline
this choice; that is, open it in the ArcGIS.com map viewer. You should see
Oklahoma counties in the same uniform green symbol ( Figure 6.15 ) . Click
on the button allowing you to show the contents of the map, and click on
the Oklahoma Counties 1900 to 2010 layer. Find the arrow pointing to the
right, and use this arrow to access a context menu. From the content menu,
select “Change Symbols.” Change the contents to the right of the “Use” text
to “Color” to make a color thematic map, and select the field “Pop 1930” to
map the 1930 population by county. Start with natural breaks and apply
your changes. What spatial patterns of population do you notice around the
 
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