Safety 1st 49533 User Manual download pdf (Page 2)

www.esri.com ArcUser Fall 2009 41

Hands On

By Mike Price, Entrada/San Juan, Inc.

Timely integrated response to emergencies lim-

its suffering and damage. GIS helps responding

agencies provide better service. This is the last

in a series of articles, which began in the Octo-

ber–December 2006 issue of ArcUser magazine,

that have demonstrated how re departments

can model service areas and response using the

ArcGIS Network Analyst extension.

Run orders allow a public safety agency

to predict and map the arrival sequence and

times for responders traveling to an incident

from multiple locations. Previous exercises in

ArcUser used optimized travel areas generated

using the ArcGIS Network Analyst extension

to identify the station from which the rst re-

sponders (i.e., First Due) will arrive for a given

location. By sequentially remodeling each First

Due provider, Second Due coverage areas can

also be mapped.

Response modeling beyond Second Due

coverage areas has always been difcult. In

“Do It Yourself—Building a network dataset

from local agency data,” which appeared in

the Summer 2009 issue of ArcUser, a sample

dataset for the city of Redlands, California, was

modied so it would support time-based travel

modeling with ArcGIS Network Analyst 9.3.

Working this exercise requires a basic un-

derstanding of ArcGIS Desktop and the ArcGIS

Network Analyst extension. To review model-

ing travel networks with ArcGIS Network

Analyst, including information on distribution

What You Will Need

• ArcGISDesktop(ArcView,ArcEditor,

 orArcInfolicense)

• ArcGISNetworkAnalystextension

• SampledatadownloadedfromArcUser Online

• 500MBoffreediskspace

Run orders model response scenarios. This map

shows the approximate time interval that the rst crew

on scene will wait for the second crew to arrive.

Continued on page 42

and concentration, and to work other exercises

in this series, visit the Learn How to Model

Networks page (www.esri.com/news/arcuser/

avmodel.html).

This exercise extends the street data that was

enhanced in the previous exercise to include in-

formation about arrival orders and times for up

to ve emergency responders. In addition, ar-

eas where First Due coverage is within national

standards will be identied and backlled re-

sponse analyzed when the nearest provider is

already on a call. To ensure safe, quick entry

into a structure by responders, the time lapse

between arrival of the rst and second units will

be determined.

This tutorial shows how to model and map

arrival orders for four re stations near ESRI’s

headquarters in Redlands, two western stations

in the nearby city of Loma Linda, and one sta-

tion to the east of Redlands in Mentone. It in-

volves a complex workow that includes de-

nition queries, tabular joins, eld and geometry

calculations, and data exports. It requires great

attention to detail.

Instead of using the dataset produced when

working the 2009 Summer issue exercise, use

the sample dataset for this tutorial available

from ArcUser Online. It has been converted

from shapeles to a le geodatabase and con-

tains several additional elds that support run

orders, and the network dataset used will be

built inside a geodatabase feature dataset. Even

though the sample dataset is small, you will

need at least 500 MB of hard drive space to

complete this exercise. Also note that the Clos-

est Facility solution is complex and will take

some time to solve.

GettingStarting

Download the sample dataset, Redlands.zip,

from ArcUser Online, which contains all the

data necessary to perform this tutorial. Un-

zip Redlands.zip near the root of your project

folder and open its contents in ArcCatalog.

Navigate to the Redlands folder, expand the

Redlands_Fire geodatabase, and preview the

Run_Order_Model feature dataset in Geogra-

phy and Tablemodes. As in the previous exer-

cise, the projected coordinate system is North

American Datum (NAD) 1983 California State

Plane Zone V, and the unit of measure is the

U.S. Survey Foot.

Preview the feature class named Network_

Streets, as shown. Notice this street data is very

similar to the street data used in the exercise

in the last issue. With Network_Streets select-

ed, switch to table view and explore the table

structure. Scroll to the elds on the right side

1 2 3 4 5 6 7

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