Geography Reference
In-Depth Information
Quantum GIS Users
210˚
240˚
270˚
300˚
330˚
30˚
60˚
90˚
120˚
150˚
1 8
180 ˚
90˚
90˚
60˚
60˚
30˚
30˚
-30˚
-30˚
-60˚
-60˚
-90˚
-90˚
180˚
210˚
240˚
270˚
90˚
120˚
150˚
180˚
300˚
330˚
30˚
60˚
Figure 11.4: Quantum GIS users plotted on a Robinson projection
using GMT
We specified the symbol size as 0.15 cm. You should recognize the rest
of the parameters from our previous discussion.
The final result is shown in Figure 11.4 . This combines the base map
with the user data. We could have added other point data by running
another psxy command.
As you can see, GMT is a handy tool for creating maps from the com-
mand line. We've really only scratched the surface of its capability.
More GMT
GMT has many more features than we have covered—there are sixty-
four commands at last count. You should have the basics down, allow-
ing you to venture forward and generate even more impressive maps.
Make sure to consult the GMT documentation for additional informa-
tion, including cookbook recipes and tutorials.
 
 
 
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