Case Study – Identifying Building Heights over 32 ft for the City of Franklin Fire Department

Challenge Use LIDAR data to identify building heights over 32 ft (3 stories) for the City of Franklin Fire Department to maintain a building database with elevation information. Solution The Franklin Fire Department asked if our GIS department could identify all of the buildings within the city limits that were over 32ft or 3 stories…

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Breaklines, Part 5 – Enforce Varying Elevation

In the last edition of LP360 News, we discussed the creation of 3D breaklines for enforcing situations where the elevation must be a constant along the breakline. The most common example of this applications is “water body flattening” such as lakes and ponds. In this final installment of the breakline series, we will consider the…

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Breaklines, Part 4 – Enforce Constant Elevation

In the last edition of LP360 News, we discussed the creation of 3D breaklines. Recall that, for our purposes, a 3D breakline is a vector that has an elevation value (Z) associated with each vertex. Generally, 3D breaklines can be divided into two categories – those with the same elevation for each vertex (used for…

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Breaklines, Part 3 – Z Conflation

As we have discussed in the last two issues of LP360 News, breaklines are two- or three-dimensional graphic data (points, lines, polygons) that we introduce into an elevation model to alter the topology. When working with Geographical Information System (GIS) models, we nearly always model complex, irregular elevation data as a Triangulated Irregular Network (TIN).…

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Breaklines, Part 2 – Contours

In the previous issue of LP360 News, I introduced the use of Triangulated Irregular Networks (TIN) for modeling point derived elevation data as well as the basic concepts of “soft” breaklines. I realized when writing that first article that it is probably a useful exercise to review contours. Thus this part II article will be…

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Breaklines, Part 1 – An Introduction

One of the more powerful capabilities within LP360 is breakline capture and enforcement. In fact, many LIDAR production shops use LP360 as their tool of choice for supplementing point cloud data (derived from LIDAR or correlated imagery) with breaklines. But what are breaklines and how should they be used? Over the next several issues of…

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Copy Symbology from one Window to Another

Do you ever get irritated that you have to enter your symbology information/settings into each view window? The Copy Legends dialog (Figure 1) is the answer you are looking for. The LP360 Copy Legends dialog allows you to quickly copy the LIDAR display and symbology settings such as elevation, classification, point source, and return combinations…

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