GIS for Noise Simple GIS Tools to Improve Noise Analysis Presented - - PowerPoint PPT Presentation

GIS for Noise

Simple GIS Tools to Improve Noise Analysis

Presented by Kevin Keller TRB ADC 40 Summer Meeting July 23, 2007 San Luis Obispo, CA

GIS – Geographic Information System

• Geographic – Related to the surface of the

earth – Point, Line, Polygon

• Information – Each Point, Line, Polygon

has Data related to directly to it.

• System – Computer Program

GIS Computer Software

• ESRI (ArcView)– Has the most users – 90

% of the GIS market - most public agencies in the U.S. are users.

• CADD system can be set up to work like a

GIS system

• Google Earth, MSN Live Search
• Noise Model Software:TNM, LIMA,

Soundplan, CANDA, ETC.

How can this improve Noise Analysis?

GIS Data

• Land Use Data – Zoning, Parcel

– Use to plan field work, placement of model sites, address and building information

• Air Photos

– Use to plan field work, placement of model sites, measuring distance, graphics

• Topographical – USGS DEM, CADD Contour Lines

– Use to build 3d surface of project area, which is used to calculated elevations of roadways, receivers, and barriers.

Screening Level

• Distance – Buffer, Overlay
• Sensitive Land Uses
• Potential Affected Population

Impact Metric = (#Res. Population Impacts/Mile) + (0.3 x(#MU Population Impacts/Mile)) + ((100 X # Hospitals)/Mile) + (250 x # Schools)/Mile)

Building a TNM Model

• Data – Need to Start
• CADD/GIS file of existing TOPO –

Roadway, Buildings, Contour Lines, etc

• Data – Needed to Complete Model
• Measurement Locations, Traffic
• Build Design File showing lane markings,

and Edge of Proposed Roadway

• Software Needed – TNM, ARCGIS, Excel

• Other Data –
• Air Photos, Design Files in 3d, Elevation

Points used for Design

Output - Graphics

Questions