transforming legacy applications with html5 & arcgis web

Los Angeles CountyO F F I C E O F T H E A S S E S S O R

James Kulbacki, Principal Appraiser

Alan Santos, Senior Application Developer

Transforming Legacy Applications

with HTML5 & ArcGIS Web APIs;

fast, simple, powerful recipe for improvement

About the LA County Assessor

Challenge Faced

Solution

API integration

Q&A….

L o s A n ge l e s C o unt yO F F I C E O F T H E A S S E S S O R

About the AssessorW h a t w e d o :

• Locate All Property in LA County.

• 2.4 Million parcels/properties.

• 300k Business assessments.

• Identify the Owner of Each Property.

• Review 350,000 recorded documents each year.

• Establish an Assessed Value for Each Property.

• Complete 500,000 Appraisals per year.

• Apply All Legal Exemptions.

• Complete an Assessment Roll.

• $1.3 Trillion Dollar Roll ≈ $13 Billion in Revenue

Statistics and figures from the 2016 Assessment Year


The Challenge: “ ”The existing core legacy system consists of a mainframe built with 1970’s technology that is now over 30 years old. It contains cryptic historical codes, keys, acronyms, and other language that users must either memorize or look up in manuals.

Limitations:• 1970’s Technology.

• Limited Search.

• Poor Navigation.

• Cryptic Codes & Keys.

• No Reference to Location.

• Device Dependent – No Mobility.

• Lack of Scalability – No Change.


Property Characteristics codes/keys:• Single Family Home

• Pool

• Central Air Conditioning

• Wood Frame

• Average Construction Quality

Location, Location, Location……

WHERE? Los Angeles


The Solution: The Assessor’s Office created an interface, called the Assessor Portal, that provides legacy assessment information in a modern, friendly, and intuitive environment. This interface solved some immediate needs while the Department began planning for the long term replacement of the legacy system. Most importantly, it began the significant change management process that long term solutions were anticipated to face.

Benefits: • Modern “Responsive” Interface

• Enhanced Search Options

• Simple Navigation

• Translation of Codes & Keys

• GIS and Mapping Capabilities

• Device Independence - Mobile


The Hard Part…….Data

• Data: ETL Processes• Cobol: Reverse Engineering• Paper: Reference Data

Services: The Lego Analogy


The Easy Part…….Maps

ArcGIS JavaScript API

ArcGIS Server REST API: Geocoding Service. LA County hosted (eGIS)

HTML5, CSS, & JavaScript (Dojo & AngularJS)

EagleViewAPI

Oil & Gas Fields

ArcGIS Server REST API: Map Services

ESRI ArcGIS Online for LA County

Custom Base MapAerial ImageryAssessor ParcelsRecent SalesCities & CommunitiesSchool Districts


LA County hosted (eGIS)

GoogleAPI

EagleViewAPI

Public Land Survey (PLSS) Oil & Gas Wells





602 E Maple



Custom Base Map





Custom Base MapAerial ImageryAssessor Parcels










State of California hosted









Oil & Gas Fields











Oil & Gas Fields




602 E Maple









Oil & Gas Fields












Oil & Gas Fields




GoogleAPI









Oil & Gas Fields




GoogleAPI

EagleViewAPI









Oil & Gas Fields




EagleViewAPI

GoogleAPI

EagleViewAPI


The Hard Part…….Map Data Creation and Maintenance


Mapping Services working pic here

Assessor’s Mapping Services Division has 30 staff members that maintain the constant creation, division, combining, and general change to the County’s parcels.• 2.5 million parcels. • About x thousand per year.


Every three years:• Aerial Imagery: Ortho @ 4” resolution• Aerial Imagery: Oblique N,S,E,W views• Building Outlines (rooflines)• LIDAR and/or Near-Infrared • Processed Data Sets

- Land Cover (7 categories)- DEM, Contours, etc

LARIAC

Bing


THANK YOU

Questions?

Visit us at: https://portal.assessor.lacounty.gov/

transforming legacy applications with html5 & arcgis web

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