Book Image

ArcGIS for Desktop Cookbook

By : Daniela C Docan
Book Image

ArcGIS for Desktop Cookbook

By: Daniela C Docan

Overview of this book

Table of Contents (18 chapters)
ArcGIS for Desktop Cookbook
About the Author
About the Reviewers


The 3D Analyst extension allows you to display and analyze your 3D data. 3D data means 3D features, rasters, and Triangulated Irregular Networks (TINs). This 3D data contains a z-value. A z-value refers to an attribute other than the horizontal position (for example, projected x and y coordinates). In this chapter, your z-value will represent the normal heights (gravity-related height) expressed in meters.

The particular term height and the general term elevation are used interchangeably in this chapter because some ArcGIS instruments and parameters use the term: elevation. The term elevation means the height above a given level. In particular, our height term means the height above the local mean sea level.

According to the international standard ISO 19111:2007 on geographic information—spatial referencing by coordinates:

  • A gravity-related height is a height dependent on Earth's gravity field.

  • A normal height (H) is a gravity-related height that approximates the distance of a point...