Sacramento Regional Digital Orthophoto Project - PowerPoint PPT Presentation

1 / 27
About This Presentation
Title:

Sacramento Regional Digital Orthophoto Project

Description:

Maria MacGunigal, GIS Coordinator for the City of Sacramento ' ... Orthos have been adopted as a foundation layer for Sacramento Regional GIS ... – PowerPoint PPT presentation

Number of Views:50
Avg rating:3.0/5.0
Slides: 28
Provided by: exli
Category:

less

Transcript and Presenter's Notes

Title: Sacramento Regional Digital Orthophoto Project


1
Sacramento Regional Digital Orthophoto Project
  • Roger Exline, GIS Manager
  • Sacramento County
  • Kallen Bailey, Director of Production
  • ImageAmerica Corporation

2
Background
  • Sacramento Regional GIS Cooperative
  • Absolute, Relative and Referential Accuracy
  • Combined several image acquisition projects into
    a single jointly-funded project
  • Support of several public safety applications
  • Desire for annual updates

3
Project Overview
  • The intent of this RFP is to solicit proposals
    from vendors that utilize various technologies so
    that the project team can qualitatively compare
    differences in positional accuracy, resolution,
    overall usability, cost and conversion time
    frame.

4
Project Participants
  • Sacramento County
  • Sacramento Area Council of Governments (SACOG)
  • Sacramento Municipal Utility District (SMUD)
  • City of Sacramento
  • Cal-Trans
  • Sac-Yolo Mosquito Abatement
  • Sacramento Metropolitan Fire District
  • Sacramento Area Flood Control Agency (SAFCA)

5
Aggressive Project Schedule
  • 1/25/01 Release of RFP
  • 2/16/01 Contractor selected
  • 2/26/01 Contract signed
  • 3/12-13/01 Aerial mission flown
  • 5/15/01 TIFF Imagery delivered

6
Cost and Schedule Comparisons
  • ImageAmerica 4/26/01 99,900
  • A 2/22/02 402,875
  • B 6/30/01 575,470
  • C 12/6/01 584,430
  • D 11/26/01 598,150
  • E 7/27/01 612,750

7
Coordinate Accuracy QC
8
Miscellaneous Project Facts
  • Imagery covers approx. 1,175 square miles
  • Index Grid is CA State Plane NAD83 Zone 2
  • 5,461 Individual GeoTiffs _at_ 24 MB ea. on 232
    CDs (131 GB)
  • 5,461 Individual MrSids compressed _at_ 201 (1.2
    MB ea. for a total storage of 6.5 GB)
  • 11 images either did not pass QC or could not be
    opened from the delivered CDs and were redone

9
Current Uses of the Orthos
  • Verification of spatial accuracy of cadastral
    layers
  • Verification of census block boundaries in
    support of legislative redistricting
  • Law enforcement event planning
  • Identification of vineyard areas (glassy-winged
    sharpshooter)
  • Determining access and egress routes in rural
    areas in support of fire suppression
  • Development of pre-fire plans for commercial and
    mercantile development
  • Use by private consultants, engineers and
    developers

10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
What Participants Are Saying
  • We got a very good product for a very reasonable
    price. Maria MacGunigal, GIS Coordinator for
    the City of Sacramento
  • It has had great value, SMUD has already had
    four departments gain great benefits from its
    use. Jim Hayes, SDIT Project Manager for SMUD
  • SACOG sees these orthos as an essential
    infrastructure layer for municipal GIS. Joe
    Concannon, SACOG

26
Conclusions
  • Orthos have been adopted as a foundation layer
    for Sacramento Regional GIS
  • Short project lifecycle guarantees the use of the
    most up-to-date orthos and a quicker return on
    investment
  • Reasonable project cost has made it much easier
    to add new participants
  • Entire County ortho layer will be updated on an
    annual basis

27
New Participants
  • Sacramento Regional Transit District
  • City of Elk Grove
  • City of Citrus Heights
  • ???
Write a Comment
User Comments (0)
About PowerShow.com