<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>GRASS Tutorial for nviz</title> <link rel="stylesheet" href="grassdocs.css" type="text/css"> </head> <body bgcolor="#FFFFFF" link="#0000DF" vlink="#006000"> <img src="grass_logo.png"><hr align=center size=6 noshade> <h1>NVIZ Reference Manual</h1> <hr width="100%" align=center size=4 noshade> <p> <a href="nviz_toc.html">CONTENTS</a> </p> <h2>Position Panel</h2> <p>The <strong>Position</strong> panel lets you manually control the <strong>From</strong> (eye) position and the <strong>To</strong> (surface) position. You can manually enter coordinates or calculate coordinates based upon a range, bearing, and elevation. </p> <BR><BR> <DL><DD> <img src="nvimg/panel/position.gif" alt="Position Panel" width="308" height="194"> </DD></DL> <BR><BR> <h3>OPTIONS</h3> <dl> <dt> <strong>From (eye)</strong></dt> <dd>Enter coordinates in <strong>GRASS</strong> database units for the <strong>From</strong> (eye) position.<br><br> <dl> <dt> <strong>East</strong></dt> <dd>Enter the easting of the eye position. <br><br></dd> <dt> <strong>North</strong></dt> <dd>Enter the northing of the eye position. <br><br></dd> <dt> <strong>Ht</strong></dt> <dd>Enter the height (elevation) of the eye position. <br><br></dd> </dl> </dd> <dt> <strong>To (surface)</strong></dt> <dd>Enter coordinates in <strong>GRASS</strong> database units for the <strong>To</strong> (surface) position.<br><br> <dl> <dt> <strong>East</strong></dt> <dd>Enter the easting of the surface position. <br><br></dd> <dt> <strong>North</strong></dt> <dd>Enter the northing of the surface position. <br><br></dd> <dt> <strong>Ht</strong></dt> <dd>Enter the height (elevation) of the surface position. <br><br></dd> </dl> </dd> <dt> <strong>Range/Bearing</strong></dt> <dd>Calculates either a new <strong>From</strong> or <strong>To</strong> position based upon a <strong>Range</strong>, <strong>Bearing</strong>, and <strong>Elevation</strong>. <br><br> <dl> <dt> <strong>Range</strong></dt> <dd>Enter the range (distance) between the eye and surface positions. <br><br></dd> <dt> <strong>Bearing</strong></dt> <dd>Enter the bearing (in degrees) between the eye and surface positions. <br><br></dd> <dt> <strong>Elev</strong></dt> <dd>Enter the elevation (in degrees) between the eye and surface positions. <br><br></dd> </dl> </dd> <dt> <strong>Eye to Surface</strong></dt> <dd>Uses the <strong>Range</strong>, <strong>Bearing</strong>, and <strong>Elevation</strong> values to calculate a new <strong>To</strong> position. The <strong>From</strong> position remains unchanged. <br> <strong>NOTE:</strong> Use this option with caution, because it is possible to move the surface completely out of view. <br><br></dd> <dt> <strong>Surface to Eye</strong></dt> <dd>Uses the <strong>Range</strong>, <strong>Bearing</strong>, and <strong>Elevation</strong> values to calculate a new <strong>From</strong> position. The <strong>To</strong> position remains unchanged. <br><br></dd> <dt> <strong>Apply</strong></dt> <dd>Calculates either the new <strong>From</strong> or <strong>To</strong> position (depending on the selected option) and updates coordinates accordingly. <br><br></dd> <dt> <strong>Refresh</strong></dt> <dd>Gets the current <strong>From</strong> and <strong>To</strong> positions from the <strong>Movement</strong> panel. <br><br></dd> <dt> <strong>Apply</strong></dt> <dd>Applies the edited <strong>From</strong> and <strong>To</strong> positions to the current view. The <strong>Movement</strong> panel updates to the new position. <br><br></dd> <dt> <strong>Close</strong></dt> <dd>Closes the <strong>Position</strong> panel. <br><br></dd> </dl> </body> </html>
