Long Sections

A long section is one section or a series of sections that deviates. In Leapfrog Geo, a long section can be created from a polyline drawn in the scene or from any line object in the project.

Versions of Leapfrog Geo before 2021.1 called long sections “fence sections”.

This topic is divided into:

Creating a Long Section
Section Layouts for Long Sections
Displaying Long Sections
Exporting Long Sections

Creating a Long Section

To create a long section, right-click on the Cross Sections and Contours folder and select New Long Section. The New Long Section window will be displayed:

You can draw the polyline in the scene directly by selecting the New polyline option. You can also use any polyline in the project by selecting the Existing line option and selecting from the lines available in the dropdown list.

The Top and Bottom parameters set the measurements for the top and bottom boundaries of the section. Start value defines the measurement for the start of the reference line. If that is considered the zero point, use 0. If another point is the origin for the line, you might wish to set the Start value for the section as being the offset distance to that origin point. The Line section start and Line section end points make use of this Start value.

Choose Entire line if the long section should span the entire reference line. If only a portion of the line is to be represented by the long section, choose Line section and set the Line section start and Line section end points to choose the portion of the line that is to appear on the long section. Note that these distances along the line include the Start value. For example, if the Start value is 40 and the Line section start is 100, the section will begin 60 units along the reference line.

If the long section is to be a single section along the reference line, untick Multiple sections. For longer lines, it is often useful to tick Multiple sections and divide the line into multiple sections. Use Sub-section length to control how much of the line appears in each section, and Sub-section overlap to specify the amount (if any) on each section that is duplicated on the adjacent section.

Click OK to create the long section. If you chose to create a New polyline, the drawing controls will appear in the scene and you can begin drawing, as described in Drawing in the Scene.

The long section will appear under the Cross Sections and Contours folder and you can edit it by double-clicking on it.

Section Layouts for Long Sections

Create a section layout template for a long section by right-clicking on the Cross Sections and Contours folder in the project tree and selecting New Layout Template from the popup menu. Design your section layout template using the section editor tools. Then right-click on the newly-created layout template in the project tree and select Copy Layout Template To, move the long section from the Available Sections list to the Selected Sections list, and click OK. For a full description on using the section editor and copying section layout templates to sections, see Working With Section Layouts and Layout Templates .

Individual section layouts can then be tweaked, adjusting the location of labels and objects to present each section optimally. Note that changing child section layouts will break the relationship with the layout template and modifications to the layout template will not affect the modified child section layout.

Displaying Long Sections

Adding the top-level long section object to the scene will display the section evaluation area, with the specific evaluation being selectable from the view list. This object cannot be displayed in the scene using the section layout.

You can, however, add individual sub-sections to the scene from the project tree. By default the section layout will be displayed in the scene, but you can also select specific evaluations from the view list.

Exporting Long Sections

Once you have completed the long section designs, sections can be exported in various forms for sharing with other stakeholders. For more information on exporting sections, see Exporting Sections.