The IDRISI Taiga installation requires every copy to be activated and licensed to a particular computer within 15 days of installation. For those users of Windows 7 and Vista, carefully read the additional activation instructions below. Then follow the instructions on each page. You can activate your license online or offline.
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Instructor : Brian Klinkenberg. Computer Lab: Rm The goal of this lab is to give you the foundations for working with IDRISI, the image processing program that you will be using in all of your subsequent labs, and for your final project.
As such, this is a long lab 6 hours is an estimate for the time required to complete this lab. However, remember that with this experience you can put down in your resume that you have some working knowledge of image processing. Given the length of this lab, you should budget your time accordingly. As a goal, you should finish Part 1, Exercises 1.
In the second week, complete the rest of Part 1, Exercises 1. Note that Exercises 1. During this lab, and for the remaining labs and in your project , you will be working with the image processing software program called IDRISI. In Part 1: Go through the IDRISI tutorials relevant to the lab topic and answer some questions pertaining to the tutorials, and In Part 2: Apply the tools and concepts you learned in the tutorials to a dataset specific to the lab.
Remember that when you use the computers in the lab, you should work locally on the C: drive, but save your work to your home directory on the H: drive or to a memory stick. Since remotely sensed images are large, please do not copy any data to your H: directory unless absolutely necessary and, if you do, you should first ZIP the files in order to reduce their size. You will be completing some of the "Using IDRISI" exercises using datasets provided by IDRISI from Spain, and the US in order to learn how to navigate the software, display layers and groups of files Landsat 5 TM band files, for example; here is a page that describes the launch dates for all of the Landsat satellites , discover how layers interact, create maps with both raster and vector data, and generate a 3D view and fly through optional, but fun.
You will then import some Landsat data of the Fraser Valley and answer some questions pertaining to that dataset. Read the first few pages about projects and working folders. Note that the project and working directories you will be using are different from those specified in the tutorial on page 6, Exercise d and e :.
Question 1. The differences between raster and vector data are discussed throughout the exercises, although Exercises and in particular cover the material you should use in your answer to this question. What wavelengths do each band capture, and what feature characteristics does each band, in particular, highlight? Question 3.
When you use the Ortho tool, you are creating an orthographic image. Define orthographic. Note that this term differs from orthophoto. Question 4. This dataset is from Spain. Use Google Earth and Google Maps link to the map to familiarize yourself with the area. How far west from Madrid is the lake in the top of the image?
Use the shape of the lake to help identify the specific lake [it is actually a reservoir--could you deduce this from the satellite image? What is the name of the lake use Google Maps? Why is it used i. What is the formula i.
Question 6: Define, with examples, qualitative and quantitative data. What is ordinal, or ranked, data? Question 7: Hand in the results of your Transparency exercise. To do this, use the Print option on the composer menu and ensure that you send your image to the appropriate colour printer. What wavelengths do bands 5 and 7 capture, and what feature characteristics do they, in particular, highlight?
Exercise Display: Surfaces -- Fly through and Illumination. This exercise is optional, but it does demonstrate some of the 'neat' capabilities of Idrisi.
View the online tutorial. Note that the San Francisco data Just for Fun Do these values correspond to the digital numbers for the pixels in bands 2, 3 and 4? You can determine this from the Feature Properties box. What is the elevation of the lake? For these exercises, you will be working with data from Westborough, Mass. When going through Exercise f , you must add a subtitle to the map that contains your name and lab section. Select a font size of Question Print the map composition you created in this exercise.
For this part of the lab you will take what you learned in the tutorials, and apply it to a local dataset: seven bands of Landsat 5 TM data, obtained in , of the Fraser Valley around Abbotsford and Chilliwack Google map. A vector file of some roads in this area is also provided.
One of the first steps you must complete before starting most Digital Image Analysis DIA projects is to import the data i. You will first import the Landsat data. The first thing to do is to create a True Colour composite image. To do this, you need to display band1 in blue, band2 in green and band3 in red. Note : The naming convention for composite images is variable. While many people place the band numbers following a short-to-long wavelengths convention e. In the IDRISI tutorial the first convention ordered by increasing wavelength was followed as discussed in footnote 19 on page 27 of the Tutorial , so we shall follow that convention in our labs.
Hand in the printout of your Landsat image composition. The roads, unfortunately, don't line up with the Landsat images although both use the UTM coordinate system, the georeferencing of the Landsat images resulted in some positional error being introduced. Zoom into the area just southeast of Chilliwack where Hwy 1 runs more or less due east-west, and use the Measure tool to determine how far off in a north-south direction only the vector roads are from the roads as imaged in the Landsat images.
Hand in the printout of your Landsat composite image. Include the same information as in the previous map, but provide an appropriate title. About 5. What are they? Provide your reasoning. Use both Landsat and Landsat to help you in your identification. What wavelengths are captured by Landsat band 6? What information is being presented in this band's image, and how could it be used?
What features turned 'black' in the image after adjusting the contrast? What features in particular stand out in the image the 'fuzzy worms' 5. Is the spatial resolution of this image different from that of the other bands? Has it been resampled if so, how can you tell? From within the Raster Group, display Landsat 6 and Landsat Then, click on the Group Link button and zoom into the band 6 image; you should then also zoom into the same area in the Landsat image.
The Group Linked Zoom instructions in Exercise provide more details, if necessary. Describe the strengths of each of the three images Landsat, Landsat, band 6 you have explored above, in aiding you with respect to interpreting the landscape. Home Syllabus Schedule Projects. Due : Week of February 11 th you have two weeks for this lab.
You may not need to save your work if you answer the questions as you go. Do not save the zip file to H: if it is not necessary. Ignore any message that may appear about a "Data path not found. We will have some hard copies of the relevant sections of the IDRISI tutorial available for you in the lab a scanned copy of the relevant sections here.
You will be completing the following exercises for this lab: 1. Click on Projects tab in the Idrisi Explorer window. You have now set both the projects folder and the working directory. If you click on the Files tab you should see a list of the files stored in the Using Idrisi directory.
There is no save icon do not worry about this. Exercise Display: Surfaces -- Fly through and Illumination This exercise is optional, but it does demonstrate some of the 'neat' capabilities of Idrisi.
Part 2: Using Landsat data of the Fraser Valley For this part of the lab you will take what you learned in the tutorials, and apply it to a local dataset: seven bands of Landsat 5 TM data, obtained in , of the Fraser Valley around Abbotsford and Chilliwack Google map. In order to complete Part 2 of this lab, copy the Landsat Double-click on the zip file Landsat Right click on the existing projects folder and select Change projects folder. Data conversion: One of the first steps you must complete before starting most Digital Image Analysis DIA projects is to import the data i.
Repeat this process for the 6 remaining bands. Click on the check box , and then click on the Ensure that the output file names are spelled the same, but end with the appropriate band. Although this is not necessary, it is good practice to name files so that their relations are obvious. Note that we don't have Band 6L or 6H data.
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