Autodesk 15606-011408-9005 Tutorial - Page 122

Lesson 4: Add Raster Images, Exercise 1: Insert a raster image

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Lesson 4: Add Raster Images Maps can contain more than drawing objects. For example, you can add graphics. In this lesson, you insert a raster (bitmapped) graphic and display it behind the other objects in your map. You also modify the image in your map. Your edits do not change the original image file, but only the way the map displays it. In this lesson, you change the brightness and contrast. You also clip the image, to display only part of it. NOTE For a tutorial on adding an FDO raster image through Data Connect, see Exercise 5: Add a raster image (page 45) in the Building a Map tutorial. Exercise 1: Insert a raster image Aerial and satellite photographs often contain information about their location and scale. This information makes the images "georeferenced." AutoCAD cannot use this georeferencing information, so it cannot properly position the imagery, but AutoCAD Map 3D can. In this exercise, you insert a digital raster graphic (DRG) of Redding, California, into a drawing of the same city. The information in the associated TIFF world file (TWF) allows you to locate and scale the image correctly. NOTE While it is not required for this tutorial, you can download AutoCAD Raster Design Object Enabler for AutoCAD Map 3D 2009 from http://www.autodesk.com/rasterobjenabler. This free utility supports many raster image formats that Data Connect does not support. 114 | Chapter 3 Tutorial: Moving From AutoCAD to AutoCAD Map 3D

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Lesson 4: Add Raster Images
Maps can contain more than drawing objects. For example, you can add
graphics.
In this lesson, you insert a raster (bitmapped) graphic and display it behind
the other objects in your map.
You also modify the image in your map. Your edits do not change the original
image file, but only the way the map displays it. In this lesson, you change
the brightness and contrast. You also clip the image, to display only part of
it.
NOTE
For a tutorial on adding an FDO raster image through Data Connect, see
Exercise 5: Add a raster image
(page 45) in the
Building a Map
tutorial.
Exercise 1: Insert a raster image
Aerial and satellite photographs often contain information about their location
and scale. This information makes the images
georeferenced.
AutoCAD
cannot use this georeferencing information, so it cannot properly position
the imagery, but AutoCAD Map 3D can.
In this exercise, you insert a digital raster graphic (DRG) of Redding, California,
into a drawing of the same city. The information in the associated TIFF world
file (TWF) allows you to locate and scale the image correctly.
NOTE
While it is not required for this tutorial, you can download AutoCAD Raster
Design Object Enabler for AutoCAD Map 3D 2009 from
. This free utility supports many raster
image formats that Data Connect does not support.
114
| Chapter 3
Tutorial: Moving From AutoCAD to AutoCAD Map 3D