session agenda

1 Building / Architectural Workfllows High Definition Surveying

Session Agenda

OverviewResearch MethodologyCase StudiesWorkflows

2D Elevation Views with CloudWorx 3D Models with Cyclone


Overview

More efficiency for certain Architectural and Building Surveys

New markets emerging based on the latest Leica Geosystems HDS tools


Research Methodology

Cullinan Engineering Co., Inc. My previous experience 70+ projects completed >50 of the projects involved a

buildingPlowman Craven Associates

Leading scanning company in the UK

Conducted tests of conventional survey to scanning

Mollenhauer Group On the forefront of scanning

buildings Provided comparisons of the

HDS2500 to the HDS3000


Building/Architectural Case Study and Workflow

Working With HDS to Provide Geometrically Accurate, Complete and Cost Effective Building “As-Build” Surveys and 3D Models


Company Profile

Founded in 1964, PCA is one of the most respected Geomatics companies in Europe.

Over 90 employees in UK, with clients throughout Europe with diverse projects in geomatics

Uses a variety of advanced electronic instrumentation to provide printed and digital data management, photogrammetry, aerial surveys, land surveys, advanced 3-dimensional modeling, CAD, GPS and other crucial services.

1St European company to purchase the Leica HDS 2500 in February 2001

Revenues > £ 5.5 million


Why HDS?

Building surveys (> 60%) is core area for PCA (floor plans, elevations, and site surveys, 3D modeling)

Most work focused in heavily populated urban areas

Time and money saved using HDS keeps PCA bids competitive


Cardiff City Centre “As-Built”

Deliverable “3D Visualization Service” -

Geometrically accurate AutoCAD 3D Model of existing conditions to allow showing proposed 3D scheme

Products Used Cyclone 5.2 CloudWorx 3.1 AutoCAD CloudWorx 3.1 Microstation 1- HDS3000, 2-HDS2500 AutoCAD, Microstation, 3D

Studio


Cardiff City Centre “As-Built”

Scanning Details

50,000 m2 area scanned Over 2.5 km of building

elevations Building heights > 20 m Number of control stations =

8 (surveyed with total station)

Scan worlds collected = 126


METRICS

Based on an Internal study by PCA:“The results show an accurate match between conventional methods and the scan data and a possible productivity saving of 50-60% in field and CAD time.”

EFFORT Field (person wks)

Office (person wks)

Misc.

Conventional 21 30Actual (Scanning) 6 15

Savings 71% 50%


The Workflow - FIELD

►Establish GPS control using Total Station►Perform Field Scanning using many scanners to expedite►Process Data in field and check for accuracy and completeness►Perform weekly registrations to keep project moving, data sets small, and allow multiple people to work on project►Put each scan world on a different layer in the same project


The Workflow - Office

►Clean up each scan world (layer) separately►Break project into separate projects to allow more people on different segments►Open individual projects in ACAD and Microstation CloudWorx (final deliverable was ACAD, but using Microstation followed by converting to ACAD expedites the project)►Finally, create "2.5D" ACAD drawings by extracting horizontal and vertical geometry from point cloud using AutoCAD and CloudWorx tools►Most clients have also been asking for ASCII points (PTS, PTX) data in “manageable chunks”


U-Mass Medical Center

Scope: Locate the centerline of every

window mullion for a distance calculation to a known column line. A new planar prefab façade is replacing the decaying irregular granite façade.

Deliverables: 2D elevation plans with offset

distances shown to the nearest parallel column line. Plumbness measurements at a later date.

Field (Actual): 3 ½ weeks (night work only)

Office (Actual): 7 weeks



Metrics:Task Conventional

(Estimated)Scanning

HDS2500Savings

Field Time 10 Weeks

3 ½ Weeks

65%

Office 9 Weeks 7 Weeks 22%

Notes Job would not have gone

forward if this method was

used

1 scan crew + 1 conventional

crew for control

Data was revisited for

building plumbness

measurements


5-story Building Façade, Los Angeles

Scope Geometry needed for future metal

cladding attachment points 60’H x 150’W face

Deliverables 2D plans + 10’ sections

Field (HDS3000) 4 hrs

Office (Cyclone 5.0) 12 hrs



HDS3000 advantages 50% less field time 60% fewer targets Full FOV allowed setup in

alley (160° H x 135° V scan)

Avoided need to try to access roof of adjacent building

Able to put target behind scanner

3000

(actual)

2500

(est.)

Field time 4 hrs 8 hrs

# Targets 6 13-15

Other logistics

Need to access roof of

adjacent building


Workflow Assumptions

The user of these workflows will need to be somewhat proficient in AutoCAD

All basic functions of the Cyclone software are known to the user

Cyclone and AutoCAD MUST ‘live’ on the same computer


So many workflows to pick from… Which one is right for me?

Today, there really is no one ‘cook book’ style of tackling a building project.

There must be a scope of work clearly defined, since this will drive the amount of scanning done and the type of post processing.

We will look at two types of deliverables. The full 3D model. (Done in Cyclone) The 2D elevation view (Done with CloudWorx)


Two Typical Building Workflows

b. Scanning Multiple Faces along

a streetscape

RegistrationGeo-Reference Scans Together to Assumed

or SP Coords.

Data Cleanup

a. Cyclone 3D Lines Defining corners

a. ScanningFront Face of the

Structure

c. ScanningAll Sides of the

Structure

Basic work process:

b. CloudWorx

2D Elev. view


3D Model - Cyclone Steps:

1. Unification of PointCloud

Clean up unnecessary data that has no bearing on the building face(s). Unify the remaining PointCloud

2. Creation of Lines/Patches/Cylinders/etc.

Copy small pieces of the cloud into a separate ModelSpace and create lines. Merge them back into the parent ModelSpace when done with each section.

Polygonal Fence ׀ Copy to New ModelSpace ׀ Orthographic Mode ׀ Create Patches ׀ Create Lines from Patch Intersections

3. Create Patches between the lines

Create Object ׀ From Curves ׀ Patch

Note: This method is very repetitious, and can become very mundane. Once you have done these steps a few times, assign hotkeys to the series of commands that you are using. This will speed things up considerably.


3D Model – Cyclone/AutoCAD Steps:Once all of the model has been created in

Cyclone, you are ready to export them into the AutoCAD environment.

1. In Cyclone, be sure that nothing is selected, and that you are working in the default coordinate system that was defined during the registration process. Now: File ׀ Export

2. Name the file and choose the .coe extension for the file.

3. Export visible.4. Open a new AutoCAD drawing.5. Import the file into AutoCAD.6. COE ׀ Import 7. Browse for the file, set the appropriate

units, then import.


2D Elevation View – Cyclone Steps

Very similar to the 3D initial steps. You will still clean and unify the PointCloud.

Here is where the methods change. Set up a parallel line to the face of the building. From the parallel line that you have created, set the X axis to this line. Now set the Y axis to the up direction. Save the Coordinate System in Cyclone. Now the PointCloud is ready for insertion into the AutoCAD environment.


2D Elevation View – AutoCAD / CloudWorx Steps

Start a new drawing, set the appropriate drawing settings and then SAVE!AutoCAD does not have the nice function of automatically saving everything.Go to the CloudWorx pull down and Open MadelSpace View. A box that looks the example below, will appear. Navigate to the ModelSpace View where you had set up the X & Y axis.

Be sure to correctly set the units.

Select the coordinate system that you saved.

Then hit OK.


2D Elevation View – AutoCAD / CloudWorx Steps

Now you are ready to start your drawing. Just by turning on ‘Ortho’ you will be able to trace the point cloud to achieve your final drawing. As you pan down the face of the building, be sure to ‘Regenerate PointCloud’ to be sure that all of the points are visible to you.


2D Elevation View – AutoCAD Steps

Finished plan.

..\Land Projects 3\Consul-Tech\dwg\Bldg-Clowdworx.dwg


SUMMARY

Growing market for Leica HDS solutions Latest HDS solutions are compelling for large building elevation views Field and office efficiencies are primary drivers Other key benefits: no re-visits and improved safety

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