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Topic Number: 31
The City of Los Angeles
Implements Its New Web
By: Madeleine Rackley
Date: FALL1999
Web Address:
WWW.ESRI.COM/INDUSTRIES/U_SHOWCASE
Presented By:
SARAH EL-SHOUBARY
INTROUDUCTION

THE Department of City
Planning (DCP) in los angeles
is responsible for all of the land
use and zoning in the City.
 the zoning and land use data
was recorded in the past as
paper maps that were used to
provide information at public
counters.
 In 1997, ESRI's Professional
Services Division began
working with DCP to develop a
comprehensive and
sophisticated zoning
information system.
GOALS OF THE PROJECT
1 to automate manual
2
3
4
5
mapping processes
reduce redundancy of
effort
improve the quality,
consistency, and
reliability of the
geographic data
provide access to the
data from many locations
increase productivity and
customer service
HOW DOES THE ZMA SYSTEM
WORK
 This systemprovides City users with access to zoning
data using either a Web browser or a PC client
executable application.
 This system allows a user with a browser to find a
property and view the applicable zoning information over
the Intranet.
 The extended functionality of the system was built on the
core functionality to provide more advanced queries and
high-quality map output.
 Some of the queries available are by:
1-property
2-adress
3-nearest intersection
4-map book-page-parcel 5-legal description
6-community map
7-map sheet
MAJOR DIVISION OF THE
PROJECT
1
DATA CONVERSION :
ESRI and its subcontractors
comprised one of three teams that
performed the data conversion for
DCP. This was originally proposed
as a four-year effort to automate
the 1,888 hard-copy zoning maps.
Now, however, due to good project
management, the project is ahead
of schedule
2 APPLICATION & DATA BASE
DESIGN :
The application development
strategy was first to build a core
tool for deployment to Web
browsers and then to extend that
tool to provide additional
functionality with the PCexecutable version.
MAJOR DIVISION OF THE
PROJECT
3
System Architecture and
Extensibility
ZIMAS is an integration of many
technologies including:
- Microsoft's ActiveX - Internet
Information Server (IIS)
- Internet Explorer
etc…
4 Desktop Mapping and State
Management
One of the significant challenges
with ZIMAS was to provide highquality mapping over the City's
Intranet. With a simple Web-based
mapping application, each user
must use the same map layout for
his or her area of interest.
MAJOR DIVISION OF THE
PROJECT
5
Performance
good performance is also affected
by data access (I/O), data
intensity, and number of requests
per server. Using , the
administrator is able to tune both
the number of servers running and
the number of connections per
service. This allows the
administrator to balance request
volume with Web server
processing capability. The sheer
volume of annotation data for the
zoning and land base layers
challenged the success of ZIMAS.
the administrator is able to use
SDE to refine the spatial indexing
for annotation features and so
tune performance accordingly.
Conclusion

We anticipate that ZMA will
soon be expanded to the
Internet. Then anyone will be
able to perform basic research
on properties from home or
office computers, eliminating
the need to travel to a City
facility, pay for parking, and
stand in line to get the same
information
 ZMA is already being used by
hundreds of City employees in
many departments. The
application has simplified work
at the public counters by
providing accurate zoning data
quickly and reliably.