IDRISI to ArcMAP and Back

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IDRISI to ArcMAP and Back

• Moving data from IDRISI
• To
• ArcMAP/Spatial Analyst

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Overview
Export IDRISI Vector or Image files to
intermediate files
Idrisi file
Intermediate files
Output File Extensions Images ? .asc Vectors?
.shp .shx
Import intermediate file into ArcMap
ArcGIS GRID or Shape files
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Step 1Export

• From the IDRISI file menu select Export

Select this for vector to shape
Select this for image to Grid
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Select Output Format (Image)

• This window will come up when you click ARCRASTER

ASCII Works
IDRISI Image file
Name of intermediate file
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Select output for Vector
This will sometimes balk I dont know why
yet! And sometimes IDRISI will include files that
are NOTvector files in the pick list???
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Step 2 Setting up ArcGIS

• Launch ArcMap (9.x only wont work in 8.x!)
• Select the Spatial Analyst Extension
• View Menu
• Toolbars
• Check Spatial Analyst
• If Spatial Analyst is not in the list you may
  have to load it by going to the Tools
  menu/Extensions/ and checking Spatial Analyst

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Step 2 Import

• If the toolbox is not open click ?
• Double click ASCII to Raster tool

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ASCII to Raster Dialog
Click
Click
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ASCII to Raster Dialog
Notice that path to the input raster file is
duplicated in the output raster and that
thefile name itself is similar to that of the
input.You can browse for a different output
folderand name if you wish by browsing for the
directory and editing the file name Click OK
when done.
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ASCII to Raster Dialog
Notice that path to the input raster file is
duplicated in the output raster and that
thefile name itself is similar to that of the
input.You can browse for a different output
folderand name if you wish. Click OK when done.
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And this window opens

• This window opens and the processing message
  scrolls by until the job is done. If the Close
  this dialog .. check box is checked the
  windowwill close whenthe job is done.
• If not, then youwill have toclick Close
• Green or red text is bad news

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Grid is added

• This is the result
• Note that the attribute values for asciito_water1
  were carried over.
• BUT if there is a text legend for the layer the
  attribute values will not be carried over as is
  shown in the next slide

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Import of Roads with text Legend

• This is the grid that opened when I exported the
  roads image that had text as legend values
• Note that all roads have the same attribute value

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• When this opened the Table of Contents (left of
  the image) legend had a color value for 0 and you
  could not see the elevation image below it.
• I Right Clicked the color box (patch) for zero
  (0), background value, and clicked No Color as
  shown next.
• When, in IDIRSI, I copied the roads file with out
  a background and deleted all legend entries (road
  names) and exported that to ArcMAP this was the
  result

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Changing Pallet manually

• This dialog gives you a wide range of colors to
  chose from
• Including No Color

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More advanced symbology

• Right click on the name of the grid (Im doing it
  for the roads grid that has numeric attributes
• Select Properties

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Symbology Dialog
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• Click on the Symbology Tab and this opens (1)
• You can change the colors by clicking the color
  box (2)
• Or by selecting the color scheme and picking a
  palette
• If you right click on the palette it and uncheck
  Graphic View you will get a text descriptor of
  the palette (3)
• You can type in text descriptors in the second
  column (4)
• You can delete patches not needed (remove button)
  (5)

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5
2
4
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Text Attributes

• Type in text
  ?
• And the legend in the Table of Contents (TOC) is
  updated
  ?

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The Layout View

• You can switch back and forth between the data
  view (1) and the Layout view (2)
• In the layout view you actually make the map
• Here is the layout view

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• Drawing boxes
• Select with drawing cursor
• Double click the change colors and line widths
• Neatline that encloses the data can be removed as
  above and selecting a line color of none

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Insert objects into Layout
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Insert Legend

• Click Insert/legend
• You will go through a series of Wizards to
  construct the legend
• First you select the layers you want legend info
  for in the Legend
• Here I want only water and roads

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Legend Frame

• The other Wizard that tricky is the one for
  borders, fill, and drop shadow
• GAP is very important since that specifies the
  distance between elements of the legend and the
  surrounding border
• 10 is a good choice

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Edit Legend

• Legend produced by the legend wizard
• Select legend with drawing tool
• You need to ungroup the legend elements in order
  to edit them.
• This is the legend that ArcGIS constructed after
  I removed the zero items in the layers Symbology
  tab
• I have to
• Provide a subtitle for Roads and Water
• Have only 1 legend item for water

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Editing setup

• Right click on the legend
• The menu to the right pops up
• Click Convert to Graphics (Grayed out here but
  it wont be when you do it!
• Rt click on legend again and click Ungroup

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• Green handles appear on all the elements of the
  legend
• You have to be careful here because it is easy to
  mess up the legend
• I needed a bit more space (length) of the Legend
  box and fill
• Clicked elsewhere and then on the surrounding box
• Select the box and drag the bottom of the box
  down abut 2 of the patches
• Do the same for the fill

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More

• This is what the legend looked like after I
• Deleted on of the water patches
• Ungrouped (right click) the remaining water
  patch, selected the text, and dragged up
• Selected all the road patches and their text and
  dragged them down so I had space for a
  Transportation lable

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• This is the legend after I
• Centered the word Legend using the arrow keys
  (click to select)
• From the graphics tool bar (bottom of layout
  window) selected the text tool and inserted
  Transportation Set the size to 14 by right
  clicking it and selecting text and then Change
  symbol to change the text size
• Centered it using the arrow keys
• Made the Water label the same size
• Select the entire legend by dragging a box around
  it with the graphics tool, right clicking, and
  clicking Group
• Now I can move it around at will without screwing
  it up.
• If you forget to group it and then try to move it
  you WILL screw it up, CTRL Z to the rescue if
  you do that

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ESRI Grid to Idrisi

• In ArcMap it is easy to convert between Feature
  data sets and Grids
• In ArcMap Rasters are called Grids.
• The conversion is done with command lines
• Window\Command Line menue
• Opens this

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Command line
This is what you type in
This is what get
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Using Command Line

• RasterToFloat inputraster output.fil

As soon as you type the first few letters of the
desired command a list pops up with the choices
This in the output file. You have to give the
entire path. It has to have an extension of .fil
If you have rasters in ArcMap as soon as you
space a popup of rasters will appear
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Grid in ArcMap
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And in Idrisi
How about them apples!
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In IDRISI
Browse for your .flt file
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MOVING GRIDS

• NEVER IN EXPLORER!
• You can move any folder which contains an INFO
  file
• Or you can EXPORT the data from ArcView
• Or move it in ArcCatalog