Q04
Plotting isolines from
grid data usually does
not present any
problem. Construct
the isolines (contour
interval 25) from 350
to 550.
Answers
Answer:
In many scientific disciplines, isoline maps are by far the most widely used cartographic device. Their appearance and utility are controlled by large number of design parameters related to both data processing and display. Standard packages, though flexible, do little to assist users in obtaining a good design. Here we report on a software "brewer" that allows for easy and rapid experimentation with a variety of isoline map parameters, such as interpolation method, contour interval, coloring, data focusing, etc. Our goal was to provide a tool that cartographers will find useful in testing various possibilities before committing to a final design. In addition, we believe the interactive features of the brewer make it useful in teaching introductory cartography, particularly in lecture settings where standard packages are too cumbersome for use.