Reviewing Culverts in3D with FME

Krist Nelson

PresentationOverview 1. Introduction

2. Project Overview3. Culvert Problem4. FME saves the

day!5. Project Results6. Conclusion

Introduction: Let’s get started

Thank You!

For coming to the 2016 FME World Tour

inAlbuquerque, NM

About Me

Graduate of Montana State UniversityBozeman, Montana

Geospatial Analyst&

Project Manager

10 years using FME with vector, raster and LiDARdatasets

Krist Nelson

Project Overview: Santa Fe County, New Mexico

2014 LiDAR/Orthoproject

Santa Fe County, NM3000+ sq. milesOrthophotosQuality level 2 LiDARSurface supports

1 ft contours

DEM mosaic2 ft cell, 88 Gb

file Flowline network

25 million+ vectors

But the surface needs to be hydro conditioned

NeedFlowlinegraphic

Hydro Conditioning“cut down” into

a surface to allow accumulation flow

model to crossman-made

featuresModel culverts…

Pre

Post

Culvert Problem:How to efficiently

locate, create and review the data

Where are the culverts?

SF county research pts

Analyze where: NHD crosses

OSM

Research OSM NHD

Main Point

Linear culvert features

-automation creates

line candidate- based on

shortest path that

crosses road among

several factors

A Culvert Candidate

Review candidate culverts

3000+ sites

Need to verify surface ismodified correctly

This may take awhile…

FME saves the day:Review the data in 3d

Construct a 3d sceneImageSurfaceVectors* (not required)

Reference dataHydro Model

Ortho DEM

Model Reference

Simple FME WorkflowInputs

Image- Orthophoto

Surface- DEM Manipulations

1. Create TIN2. Create 3D

model

Simple FME workbenchSimple FME workbench

Simple FME workbench

FME SurfaceModellerInputs

Points –DEMSettings

Defaults are fineOutput

TIN surface

DEM

TIN

FME AppearanceSetterInputs

Image and SurfaceManipulations

REQUIRED: same spatial extent

3D

TIN

Ortho

FME AppearanceSetter

IMPORTANT!Texture Mapping Type

Set to… “From Top View”

Live Demo:

FME Desktop

First Roundcandidate

culvertnon-conditionedoriginal

flowlines

Final Reviewfinal culvertconditioned

surfacecorrected

flowlines

Project Results:How well did the process

work?

Culvert Review totals

3029 sites reviewed

2184 culverts-1502

manual-682 auto

Conclusions:Create powerful visualizations

with data you already have!

Image+

Surface=

PowerfulInformation

ImageAny raster, not

justan orthophoto

SurfaceAny source

OutputFME Data

Inspectoror 3D PDF

Thank you!Erle Wright , GISP

GIS

coordinator Santa

Fe County

Questions?

????

Thanks!Krist NelsonGeospatial Analyst/ManagerBohannan Huston Inc.knelson@bhinc.com