Typical Deliverables

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Below is the description of deliverables, which we provide on a typical transmission line survey project. We can offer additional information and perform more in-depth processing of the LIDAR and imagery data to address your needs. Please contact us for details.

While typically we deliver the data in PLS-CADD format, we can also provide the data in other CAD systems such as AutoCAD, MicroStation, TowerCAD and in a format of custom applications you use.

1. Feature coded LiDAR data ready for use in PLS-CADD, TLCADD, TL-Pro and other specialized engineering software

Laser reflection points acquired during the survey are attributed to different classes according to special filtering algorithms with reference to the digital imagery. Please check the PDF file for typical feature-codes, imagery specification, types of objects and other details.

On the basis of the collected data we create a DTM, 3-D models of objects and files containing polylines with contours of all objects.

The coordinates of points that were attributed to different classes of objects are typically stored in ASCII files readable by most GIS and CAD-based software programs.

The feature-coded survey data on the power line is ready for use in PLS-CADD, TLCADD, TL-Pro and other specialized engineering software.

2. High resolution digital still mosaics of full survey width

Mosaics are delivered in the format readable by PLS-CADD or any other CAD or GIS software. Orthophotoplan describes the physical environment and the surface it occupies with an improved geographic precision. It preserves all the characteristics of the aerial photography and can be used for the creation of GIS. Orthophotoplan serves a variety of purposes, from interim maps to field references during power line inspections. Transformation into custom formats is available.

3. Spreadsheet tables

For effective use of information about the utility’s actual line assets, we can combine results of airborne LiDAR survey with other available technical data on the power line in a detailed and accurate database.

Technical parameters and other relevant engineering information on surveyed power lines can be presented in the form of spreadsheets, which we create using two sources of information: processed LiDAR survey data and existing documentation, such as:

Tower tables with numbers and types of all structures;
Information on crossing infrastructure;
Tower type drawings or tower type models;
Mechanical and electrical parameters of conductors and ground wires.

Typically a set of Spreadsheets contains:

Tower schedules:

Numbers and types of structures;
Coordinates of structures and conductor attachment points, l ine pivot angles and 3D span lengths of the power line;
Sag and tension at the moment of survey and calculated for the specified temperature of the conductors;
Elevations to ground of attachment points of phase conductors and ground wires .

Clearance schedules:

Span lengths;
Classes of crossed objects and objects located within ROW of surveyed power line;
Types of the conductors and ground wire;
Distances from each first structure of the span to the crossed objects;
Minimum distances from the lowest phase conductors to on-ground objects and crossing infrastructure, calculated for specified conductors’ temperature and ice conditions ;
Minimum distances between conductors of the surveyed line and conductors of crossing infrastructure, measured at the moment of survey, and calculated for the rated conductors’ temperature specified by Customer.

Table of minimum distances to vegetation calculated for specified temperature of conductors:

Distance from each first structure of the span to vegetation located within specified proximity of a conductor;
Minimum distances from lowest phase conductors to vegetation.

4. Specialized database on ArcView platform, including:

Map showing the lines ;
All line’s parameters indicated in sheets, represented as geoinformation database;
Data on objects within survey swath;
High resolution digital orthophotoplan (frame mosaic) within full survey swath;
Digital terrain model within survey swath;
Digital vegetation model within survey swath, which allows evaluating areas occupied by vegetation of various elevation and width of glade, finding sections with vegetation critically close to any of wires as of the moment of survey;
Plan geometric measurement option.

5. Time- and coordinates-stamped video footage in digital MPEG format from forward and down looking video

Video footage is delivered on CDs in compressed format to minimize the size of files. Compression rate will be agreed with the Customer. Video is linked to span numbers.

6. GRIDMC database

Please visit our GRIDMC page for more information.

7. PLS-CADD project file created on the basis of laser survey data, temperature calculation and information provided by the Customer

PLS-CADD project handles 3D model of power line and locality, a topoplan, a power line profile, orthophoto and PLS-CADD models of power line elements (structures, conductors, insulators etc.). The project allows carrying out mechanical, clearance and other calculations to examine the compliance of the power line state to the maintenance standards, its maximum operational regimes and prepare reconstruction and modernization activities.

8.Profiles of power lines in the format requested by the Customer

The processed LiDAR data can be presented in the format accepted in your power utility. We will provide accurate up-to-date data in the format your personnel is accustomed to work with, such as AutoCAD, Microstation, or PLS CADD.

Presenting graphically the information of high value, the profile provides everything necessary to identify the location of the power line and all adjacent objects and ensure effective maintenance.

Usually the power line profile consists of a top view and a profile view including:

On the top view of the Sheet – topography- and orthophotoplan, structure base points with indication of their numbers, line pivot angles, power line axis, lines of side profiles,
On the profile part of the Sheet – profile, models of structures and conductors with all necessary parameters indicated, profile of the ground and objects within the strip between the side profiles; position of low phase conductors at the maximum rated temperature; crossing infrastructure with the axis and side views of linear objects.

9. Representation of the results of ALS data processing and raw data in OPTEN 3D Viewer

OPTEN 3D Viewer provides for visualization of processed LiDAR data, orthophoto, maps, videos and supplementary information in a comprehensive way.

OPTEN 3D Viewer allows:

Viewing large laser point clouds three dimensionally and working with selected classes of LiDAR data points;
Obtaining accurate X,Y,Z coordinates of every object and elements of the power line;
Working with power line elements in 3D and obtaining accurate information about structures’ position, type, number, and span length;
Measuring distances in 3D, plan, profile, on maps and orthophotos.

The software enables user to have all relevant data by hand and easily extract the necessary amounts of information corresponding to his needs. OPTEN 3D Viewer can serve for “look-up” analysis before a detailed analysis in PLS-CADD or other engineering packages. Besides it is a useful tool for power line maintenance crews for preliminary planning of their activities on the desktop and avoiding “guesswork” in the field. It has very intuitive user-friendly interface and does not require special computing capabilities for operating with billions of points at a time.

10. Post survey engineering analysis

To get information on the engineering analysis opportunities please visit Post Survey Engineering Data Analysis section.

Please contact us to get a detailed brochure about OPTEN’s solutions for Power Utilities.