Database Reference
In-Depth Information
3. Click Next to select the graph type and values to map. Choose the
Column type and AveDelay as the height. On the Home tab, click the
Map Labels button to show the city names.
4. Rotate and zoom into the map to view the data.
5. You can map several values by dragging additional fields into the height
drop box. Drag the MaxDelay field into the Height box. You can either
create adjacent columns or stacked columns by selecting the
appropriate toggle button above the Height box.
Figure 11.37
shows the
completed map.
Figure 11.37
Mapping airport flight delays.
6. You can also show how the values vary over time. Drag and drop the
flight_date field to the time box under the field list. You should see a
play axis appear on the map. Click the Play button and observe how the
values change over time.
As you can see, Power Map has some compelling features and allows you to
visualize the data in new and interesting ways.
Summary
Humans often rely on visualizations to make sense of data. This usually
includes creating visualizations in the form of charts, graphs, and maps that
enable the user to easily spot trends and anomalies in the data. Although
Hadoop does not inherently provide native reporting and visualization
capabilities, plenty of tools are available to consume and visualize the data.
