Exercise 3:

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Exercise 3

• Getting data into
• IDRISI

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Purpose of Ex3

• To teach you the problems that arise when
  converting manuscript map data to raster digital
  data
• Usually you will convert Vector data to raster
  much easier.
• BUT how does the software do that!

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How is it done manually?

• The data is entered into a spreadsheet in this
  case Excel
• The spread sheet is saved as a
• Space delimited text (.prn) file
• Tab delimited text (.txt) file
• It is then imported into IDRISI
• And the Document file is created
• But first

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Setting up folders

• You have to use Windows Explorer to create the
  folders you are going to use BEFORE running
  IDRISI
• Download NIFKIN32, the basic dataset
• Academic1/faculty/herrington/556
• Copy Nifkin32 by copy and paste or by dragging
  the folder to your work space
• Now create folder EX3 in your workspace

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Your Workspace?

• You can either work with data on your flash
  memory stick
• OR
• Create a folder, say C/for556, and put NIFKIN32
  and your exercise folders in it.
• When done drag FOR556 to your flash memory stick
• When you come back drag it back to C/

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Your Workspace?

• You can either work with data on your flash
  memory stick
• OR
• Create a folder, say C/for556, and put NIFKIN
  and your exercise folders in it.
• When done drag FOR556 to your flash memory stick
• When you come back drag it back to C/

Any questions on that?
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How is data managed in IDRISI?

• Answer by folder (or directory)
• The first thing you do is set up the PROJECT
  ENVRONMENT
• How?
• Click on File/Data Paths

And you get.
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The Proj Environment Dialog
Your current working folder
NIFKIN And Any other folders that have data you
might use
In the Exercise EX3 in this case
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And

• Click OK or CLOSE and you are done
• What did you do?
• Told IDRISI where stuff is!
• Click on the little map button 5th in from the
  left
• Now click on the button
• Click on Nifkin
• In the Pick List select the landuse image

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DISPLAY
Click OK and voila
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Landuse
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OK, now about data

• Launch Excel
• Type in data that you recorded in Ex2
• ONE IMAGE AT A TIME!
• No column or row identifiers
• When the data is all in and verified
• Save it as

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Save Excel

• As Text
• Tab delimited (.txt) OR
• Space delimited (.prn)
• You will get some weird messages about the file
  type not supporting
• Click OK
• Click OK on the next one also
• NOW CLOSE EXCEL!!!!!!
• Click OK about saving changes about a couple of
  times

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Why close Excel?

• Because if the file is open IDRISIs import
  function just will not see it!
• This is a Windows thing not an IDRISI Thing

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Here we go

• Launch IDRISI
• Set up your Project Environment (and save it in
  Ex3 so you can go back to it).
• Click on

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Spread Sheet To IDRISi
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SSTIDRIS
Browse for the file you just created
Type in the name for the file w/o extensions
Click
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• Enter in the correct values for the image
• Reference is plane
• Units Feet
• Click OK

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SSTIDRIS
Click
c
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Title
Click OK when done
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This is my input to Excel
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And this is IDRISIs view
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More Metadata
OR
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Metadata Dialog
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Summary

• Enter data into Excel
• Saving as .prn or .txt file
• Closing Excel file
• Importing to IDRISI using SSTIDRIS
• Creating Metadata
• Rows, columns, mins and maxs, etc
• Title

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GO FOR IT!