Creating Query in Map3D 2014

Creating a Query in Map 3D 2014

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Autodesk AutoCAD Map 3D 2014 Service Pack 1

Autodesk has announced the release of service pack for its Autocad Map 3D 2014. This service pack contains all updates from the Map 3D 2014 Hotfix1.

To download AutoCAD Map 3D 2014 Service pack 1click here.

To visit the support and service page for AutoCAD Map 3D click here.

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Rectifying Raster Data - Rubbersheet

This blogs discusses the transformation methods used to Rubbersheet Raster Images in AutoCAD Raster Design

 

When rectifying a raster image using the Rubbersheet tool in AutoCAD Raster Design, you can select either Triangular or Polynomial transformation method to transform the raster image. 

Triangular Image Transformation

In the triangular image transformation method, the raster image is divided into triangular regions using the user specified control points. Note that the Denaulay Triangulation method. is used for computing triangulation. Next, transformation is applied to each triangular area.  As a result this method produces much more accurate transformation than the polynomial image transformation method. 

Note that, this method applies transformation to that part of image which is within the area defined by the Denaulays triangulation. The portion of the image laying outside the triangulation is not transformed.  As a result, the Raster Design discards the image data outside the triangulated area which leads to the loss of data. To minimise the loss of data, ensure that the control points are placed as close to the image extents as possible. 

Polynomial Image Transformation

The polynomial image transformation method, transforms the entire images by matching the source and destination points as close as possible. Unlike the triangular transformation method, this method applies transformation on the entire image and therefore does not result in loss of image data. However, this method does not always result in perfectly matched source and destination points. The positional error between the actual destination point (destination point on transformed image) and the destination point specified by the user is given by:

Positional error = √ (∆x + ∆y)

Using this method, you can specify the polynomial degree in the Degree edit box corresponding to the Polynomial radio button. Note that the higher polynomial degree will increase positional accuracy of the image points at the matching locations (source point and destination points), but will increase in warping of the image at locations away from the control points.

To specify a higher polynomial degree you will require to specify a minimum number of control points. The minimum number of  control points for polynomial degrees are as follows:

Polynomial Degrees Minimum Number of Control Points

1 3

2 6

3 10

4 15

5 21

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AutoCAD Map 3D 2014- Textbook

CADCIM Technologies and Prof. Sham Tickoo announces the release of its new textbook Exploring AutoCAD Map 3D 2014.

To order a free deskcopy (Faculty and institutes) click here

Exploring AutoCAD Map 3D2014 is available in paperback and ebook editions

For more information visit www.cadcim.com

Exploring AutoCAD Map 3D 2014 is a textbook that has been written considering the needs of the users who wish to learn and develop their skills in using AutoCAD Map 3D.

The book is composed of 11 chapters arranged in a pedagogical sequence covering the basic as well as advanced GIS concepts. In addition, this book contains a student project, based on the real world scenario, which allows you to practice your spatial analysis skills.

After completing this book, you will be able to

• Work with the coordinate reference system in AutoCAD Map 3D
• Create and edit spatial features and attribute data (Object Data table and external database)
• Attach external drawings
• Connect to the datasets data using FDO data connection
• Apply Object Classification
• Create and manage topologies
• Perform data analysis
• Output generation using the paper and electronic media

Salient Features of the Textbook

• Comprehensive coverage of concepts and tools
• Heavily illustrated text supported by over 36 tutorials, 22 exercises, and a student project
• Step-by-step explanation to guide the users through the learning process
• Additional information provided throughout the book in the form of tips and notes
• Self-Evaluation test, Review Questions, and Exercises are given at the end of each chapter so that the users can assess their knowledge
• Free teaching and learning resources are provided for the faculty and students

For attractive discount visit www.cadcim.com

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Autodesk AutoCAD- Live Maps (Bing Maps)

Live Maps (Bing Maps)
Autodesk has introduced the Geolocation feature in its AutoCAD based software, that allow the user to use the Bing Maps as the mapping service. Using this feature, an user can now integrate the spatial data (raster and road) provided by Bing maps within the project environment.

The Bing map services are free services but to use them you are required to Sign In to your Autodesk 360 account. Also, as this is an online mapping service, you will require an internet connection to connect to the Bing map data.

Displaying Bing Map Data into AutoCAD Map 3D
Ensure that your project has a coordinate system assigned to it and then login to the Autodesk 360 account.

Next, enter the GEOMAP command in the command line and then press ENTER; you are prompted to specify the map type that you want to add.

        To add a high resolution satellite/ aerial image, enter Aerial in the command line 

        To display the Bing maps road data, enter Road in the command line

        To display the aerial photo along with the road data, enter Hybrid in the command line.

After specifying the required map type, press ENTER; the selected map will be displayed in the drawing. 

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