About the general ESRI Maplex Label Engine settings

In addition to the standard global label settings, Maplex provides three more parameters to control how labels for all layers are placed. These settings are saved for each data frame in your map.

Learn more about the general label settings provided with the ESRI Standard Label Engine

Line connection

Line connection combines groups of individual line features with the same name into a single linear feature for the label engine. This is usually desirable because linear features, such as pipelines and utility networks, are often digitized as many small segments that must be connected to represent a single real-world feature. If the segments are not connected, the feature may appear to be overlabeled, with the same label repeated along its length for each segment. Line connection is applied when placing labels with the Regular Placement, Street Address Placement, and River Placement styles.

In some cases, you may want to turn off the line connection, such as the following:

When line connection is on, the label engine will always connect line segments, so the number of output labels will not match the number of input label features.

The line connection type lets you control how junctions are handled when lines are connected. There are two options:

Line connection set with minimize labels type
Line connection set with unambiguous type (This is the default.)

Allow labels to overlap the map border

By default, labels are placed within the border of the map's data frame. You can allow parts of labels to overlap the border to increase the likelihood that they will be placed, although the part of the label outside the border will not be visible on the map. This is useful when making a map series and merging map tiles, where it may be desirable to have the label placed on the map (albeit running into the next tile) so it is available when editing the map border.

The image below shows the label on the left overlapping the map border. This label should read Wood County.

Labels overlapping the map border

Compound polygons

Sometimes a group of geographic features is represented by a single multipart polygon feature. For example, in a feature class of the United States, the state of Hawaii could be represented as one polygon with seven parts. When labeling such features, you can choose between labeling each part of the feature with the same label or placing one label for the largest part.

The images below show the islands of Hawaii labeled two different ways. The upper image shows each island in the multipart polygon labeled with the name. In the lower image, only the largest polygon is labeled, as the Label only the largest polygon in a multipart polygon feature option has been checked.

Labeling compound polygons

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