How the City and County of Denver

Serves Digital Aerial Imagery

Paul A. Tessar, DenverGIS Data Administrator

Genie Hays, LizardTech

Presentation Overview

• LizardTech Background

• DenverGIS Background

• DenverGIS Imagery Services Compatibility

– Legacy approach was using SDE Raster mosaics

– Implemented ArcGIS Server Image Services in 2011

– ArcIMS was only app that could not use AGS/IS.

• Conclusions

The Problem…

• Serving Images as SDE Rasters consumed too

many resources: Disk space, HW & licenses.

• The 2010-3” aerial imagery was too large to

load into an SDE Raster Image.

• ArcGIS Server Image Server resolved these

issues for all client apps but ArcIMS.

• We had no choice but to retain SDE for ArcIMS

image service and were unable to include the

latest 2010 imagery. A real problem…

• We were in a pickle…

DenverGIS Imagery Services Compatibility

Platform

ArcGIS

Server

Image

Service

ArcGIS

Server

WMS

JPEG 2000

Tiles &

Mosaics

Mosaic

Datasets

LizardTech

Express

Server*

ArcMap

10+ Yes Yes Yes Yes Yes

ArcGIS

Explorer Yes Yes Yes^ No Yes

AutoCAD No Yes No No Yes

ArcIMS No No No No Yes

^: JPEG2000 Mosaics Only *: Via WMS/WFS

Use Imagery with ArcMap

Use Imagery with AutoCAD

Use Imagery with ArcExplorer

Use Imagery with ArcIMS

• Simple configuration setting in ArcIMS.

Express Server ArcIMS App ArcIMS File System

(Tiles/ Mosaics)

The Solution…

• 2 Express Server licenses

– Production License: installed on primary server

– Development License: installed on backup server

• Cost avoidance

– Two 4 CPU Oracle Windows licenses $260,792 (Discounted)

– 1TB disk storage $40,000 (Estimated)

– Two dedicated Windows Servers $40,000 (Estimated)

– Total Costs Avoided $340,792

– Express Server License $8,000 Retail

– ROI - one-time 43:1, recurring 29:1

• Legacy support – ArcIMS worked fine with Express

Server and 2010 imagery was available.

• Speedy imagery delivery with greatly reduced costs.

Finis

Genie Hays

206-902-2811

ghays@lizardtech.com

Twitter: @lizardtech

Paul Tessar

720-913-4882

Paul.Tessar@denvergov.org

Twitter: @paultessar