After 15 over flights of the Denver Metro area, DenverGIS now has more than 1000 layers of JPEG 2000 imagery from DRCOG (Denver Regional Council of Governments). When an attempt to create a 3500 GB mosaic in SDE failed, our team was faced with the need to budget for more storage space. A further complicating factor was the need to replace a soon-to-be retired ArcIMS license. With space and speed being the primary issues, we began evaluating LizardTech’s Express Server.

1. How the City and County of Denver
Serves Digital Aerial Imagery
Paul A. Tessar, DenverGIS Data Administrator
Genie Hays, LizardTech

2. 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

3. 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…

4. DenverGIS Imagery Services Compatibility
ArcGIS
ArcGIS JPEG 2000 LizardTech
Server Mosaic
Platform Server Tiles & Express
Image Datasets
WMS Mosaics Server*
Service
ArcMap
Yes Yes Yes Yes Yes
10+
ArcGIS
Yes Yes Yes^ No Yes
Explorer
AutoCAD No Yes No No Yes
ArcIMS No No No No Yes
^: JPEG2000 Mosaics Only *: Via WMS/WFS

5. Use Imagery with ArcMap

6. Use Imagery with AutoCAD

7. Use Imagery with ArcExplorer

8. Use Imagery with ArcIMS
• Simple configuration setting in ArcIMS.
File System Express Server ArcIMS ArcIMS App
(Tiles/ Mosaics)

9. 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.

10. Finis
Paul Tessar
720-913-4882
Paul.Tessar@denvergov.org
Twitter: @paultessar
Genie Hays
206-902-2811
ghays@lizardtech.com
Twitter: @lizardtech