Knowledge Base - Technical Articles
HowTo: Use the Taper Geometric Effect
| Article ID: | 32430 |
|---|---|
| Software: | ArcGIS - ArcEditor 9.2 ArcGIS - ArcInfo 9.2 |
| Platforms: | Windows 2000, XP, 2003Server |
Summary
Instructions provided describe how to add the Taper Geometric Effect to a representation rule for fill symbol layers to create polygonal symbology from linear input geometry. The fill symbol changes in width from one end of the line to the other according to values chosen by the user.
More information is also provided in the Help topic: "Working with geometric effects" from the link in Related Information below.
ESRI hopes that you will find this sample useful and that it will contribute to your success in using ArcGIS. Please note that this sample is not supported by ESRI. This sample is provided for non-commercial purposes only. Permission to use, copy, and distribute is hereby granted, provided there is no charge or fee for such copies. THIS SAMPLE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ESRI shall not be liable for any damages under any theory of law related to Licensee's use of these samples, even if ESRI is advised of the possibility of such damage.
More information is also provided in the Help topic: "Working with geometric effects" from the link in Related Information below.
ESRI hopes that you will find this sample useful and that it will contribute to your success in using ArcGIS. Please note that this sample is not supported by ESRI. This sample is provided for non-commercial purposes only. Permission to use, copy, and distribute is hereby granted, provided there is no charge or fee for such copies. THIS SAMPLE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ESRI shall not be liable for any damages under any theory of law related to Licensee's use of these samples, even if ESRI is advised of the possibility of such damage. Procedure
Add a new geometric effect to be used by ArcMap, add the geometric effect to a representation symbol layer and use the geometric effect as part of the representation rule.
The example used in the following instructions are to improve the looks of river features.
To use the Taper Geometric Effect, download and install the Taper.dll. See the link in the Related Information section below to install the Taper Geometric Effect.
The example used in the following instructions are to improve the looks of river features.
To use the Taper Geometric Effect, download and install the Taper.dll. See the link in the Related Information section below to install the Taper Geometric Effect.- Start ArcMap and add a linear feature class that contains at least one Representation. If none are present, create a new representation.
See "Managing feature class representations" in Related Information below to learn how to create a representation in ArcMap and ArcCatalog. - Right-click on the layer and select Properties to open the layer properties dialog box.
- Select the representation and then select a rule.
Note a single stroke layer.-show me-
This is an example of how this looks on the map.-show me- - Click the Add new fill layer button
to store the result of the Taper effect.
-show me-
A Fill Layer is applied to a Linear feature class that produces a warning triangle to indicate that this symbol layer is not supported at this time, which displays as an undesirable result.-show me-
At this stage, ArcMap draws a polygon by interpreting an edge from the start and finish vertices of the line. Although this could be the sort of symbol that you would like to use, further steps in this example make the rivers appear more organic in shape and closer to reality.
- Change the symbol color to a shade of blue: C55, M30, Y0, K0 or R115, G179, B255.
-show me-
In this example, it matches the color of the Body rule.-show me- - Select the stroke layer and click the Delete Layer button
to remove it.
- Click the Add Geometric Effect button
to open the list of geometric effects in a new window.
- Select Tapered Polygon and click OK to close the dialog box.
-show me-
The warning triangle is now gone because the output of the geometric effect populates the Fill layer.-show me-
The polygon is now wider along the line.-show me- The direction of digitizing for a line is very important. In some cases, the river is going in the opposite direction of the taper.
The width parameters indicate how far away from the center of the line the edge of the polygon should be. In this example, the total width of the polygon at the start of the line is 0 points and at the widest location is 2 points.
The Length parameter indicates how far along the line the polygon varies its width until it arrives at the widest location of the line. In this example, the polygon reaches its widest width at a distance of 40 points from the beginning of the line.
Experiment with different width and length values to see what works best for your data.
Related Information
- Install the Taper Geometric Effect
Instructions provided describe how to install the taper geometric effect for use with ArcEditor or ArcInfo 9.2. Refer to the links in Related Information below to download the Taper DLL and for instructions on how to use the Taper Geometric Eff... - ArcGIS Desktop 9.2 Help: Working with geometric effects
- ArcGIS Desktop 9.2 Help: Managing feature class representations
Created: 1/10/2007
Last Modified: 11/12/2009
