star.gif 0.2 KLaboratory Exercise 3star.gif 0.2 K

scroll.gif 1.3 K


Background


We will continue to expand our understanding and familiarity with the display capabilities of Idrisi. This exercise consists of two more tutorials, numbers 3 and 4, from the for Idrisi Windows Student Manual. The first of these two, Map Composition, involves the use of Idrisi's Display Launcher and Composer. In this exercise, you will learn to display a raster format land cover data set and add some map elements to this display, such as north arrow, scale bar, annotation box, and so on. You will also overlay a vector format data set for roads. Finally, youll save this display as a map composition and re-display it from its saved format. In the second exercise, Palettes, Symbols, and Scaling, you will work with Idrisi's Palette Workshop and Symbol Workshop, which are used to control the appearance (color, pattern, size, etc.) of raster and vector data, respectively. You will also gain some experience in the use of Idrisi's Database Workshop and on-screen Digitizing capabilities. Lastly, you will examine the way in which Idrisi translates thematic values (the numbers assigned to grid cells) into display values (ranging from 0 to 255 in each of the three primary colors, red-green-blue), and you will learn about contrast enhancement and Autoscaling.

For more information on these concepts, refer to the Idrisi Tutorial on WWW at:

  • DISPLAY LAUNCHER

  • PALETTES & SYMBOLS FILE
  • (very cool)

  • CONTRAST ENHANCEMENT
  • (from Image Processing Module)

    and to the On-line Help available within the Idrisi software itself.

    Procedure

    With the supervision of your instructor or lab coordinator, use the Idrisi for Windows software to carry-out the directions for Tutorials 3 and 4 in the Student Manual.

    Data

    The data for these two tutorials are located in the Idrisi for Windows sample exercise data directory, typically C:\EXERCISE. The path may vary from PC to PC, so check with the instructor or lab coordinator.

    Report Format

    For Tutorial 3 on Map Composition, use your PC-skills and imagination to capture your final map display, WESTMAP, into a graphics format suitable for framing (just kidding, about the framing anyway). Paste this graphic into either a graphics presentation package or preferably Microsoft Word. This electronic map is to be submitted to the respective e-mail addresses below.

    For Tutorial 3, on Palette Workshop and Symbol Workshop, answer questions 1, 2, 3, 4, and 5. Prepare your answers in Microsoft Word format. Produce a printed copy of your answers for your records.

    File Final Report

    For University of Hartford students, submit your electronic map from Tutorial 3 and your Word-formatted answers to the questions in Tutorial 4 by way of e-mail to:
    gatemail@uhavax.hartford.edu

    For students at UConn, submit your work to:

    dcivco@canr1.cag.uconn.edu


    (Who needs) Extra Work (?)

    To gain further experience with Palette Workshop, use Help to learn about the Copy, Blend, and Reverse operations and apply them to an existing palette file, or create your own.

    Similarly, look at and try out the Apply, Blend, and Copy options within Symbol Workshop.

    Practice with these visualization tools will really help you in producing effective GIS displays.

    emboswht.gif 3.4 K

    home.gif 1.5 K mainclas.gif 1.5 K mainlab.gif 1.6 K