Imagery for the Nation and the changing landscape - PowerPoint PPT Presentation

About This Presentation
Title:

Imagery for the Nation and the changing landscape

Description:

Title: PowerPoint Presentation Last modified by: jmahoney Created Date: 1/1/1601 12:00:00 AM Document presentation format: On-screen Show Other titles – PowerPoint PPT presentation

Number of Views:130
Avg rating:3.0/5.0
Slides: 14
Provided by: fgdcGovng
Learn more at: https://www.fgdc.gov
Category:

less

Transcript and Presenter's Notes

Title: Imagery for the Nation and the changing landscape


1
Imagery for the Nation and the changing landscape
  • Remote sensing systems overview
  • Geo-spatial requirements for GIS
  • Technology advancements in sensing systems and
    platforms
  • Technology advancements in software
  • Technological advancements in visualization
  • Conclusions

2
Remote sensing systems overview
  • Aerial photography
  • National High Altitude Photography (NHAP) program
    (1980 89).
  • goal reduce duplicate photography in various
    Federal Government programs.
  • cover the lower 48 states over a five year period
    with infrared aerial photography at 158,000 and
    black and white photography at 180,000 based on
    the USGS 7.5 Quadrangles.
  • National Aerial Photography Program (NAPP)
    (1987-2003)
  • larger scale imagery (i.e. 1 40,000).
  • cost-sharing agreement with local government that
    required higher resolution, photogrammetric
    quality aerial photography.
  • in return the local government would provide
    ortho-images back to the Federal Government.

3
Remote sensing systems overview
  • Early Satellite imaging
  • Landsat I (1972) first comprehensive coverage of
    the planet.
  • 90 meter resolution four band (MSS)
  • (RBV) systems
  • Six other Landsat systems to follow
  • latest (i.e. 1999) being Landsat 7 ETM
  • six multispectral 30 meter bands
  • one 15 meter Panchromatic band
  • and its one 60 meter thermal band
  • Landsat Data Continuity Mission (LDCM)
  • 5 meter TM type sensor???

4
Remote sensing systems overview
  • A new era private sector high resolution
    spaced-based imaging
  • IKONOS in 1999 represented two firsts 082
    meters panchromatic
  • 3.2 meters multispectral
  • Geo-location accuracy lt 5 meters CE90with GCP
    DEM
  • Quckbird system in 2001 with specifications of
  • 0.61 meters panchromatic
  • 2.4 meters multispectral
  • Geo-location accuracy lt 5 meters CE90 with GCP
    DEM
  • WorldView-1 in 2007
  • 0.50 meters panchromatic
  • Geo-location accuracy 3.0 7.6 meters CE90 with
    GCP DEM
  • GEOEYE-1 in August of 2008 with specifications
    of
  • 0.41 meter panchromatic
  • 1.65 meter multispectral
  • Geo-location accuracy lt 3 meters CE90 with GCP
    DE
  • WorldView-2 expected launch date mid-2009 with
    specifications of
  • 0.46 meters panchromatic
  • 1.82 meters multispectral (8 bands)
  • Geo-location accuracy 2.0 meters with GCP and
    DEM

5
Central Park NYC
6
GEOEYE-1 Kutztown, PAOctober 7, 20081000 x in
10 years
7
Kutztown GEOEYE-1
8
Geo-spatial requirements for GIS
  • Rural
  • 50 100 cm image resolution
  • 3 - 5 m absolute accuracy of base-map (CE90)
  • spot elevations of individual buildings
  • Suburban
  • lt 66 cm image resolution
  • 1.0 3 m absolute accuracy of base-map (CE90)
  • spot elevations of individual buildings
  • Dense urban
  • lt 25 cm image resolution
  • lt 50 cm absolute accuracy of base-map (CE90)
  • 3-D modeling of individual buildings
  • true orthophotography lt 25 cm resolution
  • Oblique analytic photography (i.e. Pictometry)

9
Technology advancements in sensing systems and
platforms
  • Advancements in Sensor systems
  • Greater spatial, spectral, radiometric and
    temporal resolution
  • Advancements in positioning systems
  • Airborne-GPS
  • Inertial Measurement Unit (IMU)
  • more stable satellite platforms
  • Above enables new sensor capabilities
  • Digital camera lt 4 cm resolution
  • LIDAR absolute accuracy lt 4cm
  • Increased RADAR absolute accuracy
  • Great absolute accuracy of spaced-based images

10
Technology advancements in software
  • Automated generation of elevation data
    Photogrammetrically through image matching
  • LIDAR as a source for DEM data
  • RADAR as a source for DEM data
  • Object-based image analysis (i.e. E-cognition)
  • 3-D coordinates for geospatial objects supported
    in GIS

11
Technological advancements in visualization
  • Seamless access to multi-scale imagery of the
    earth with integration with other geographic
    layers
  • GOOGLE Earth
  • 2.5-D
  • 3-D Objects (i.e. buildings)
  • street level
  • ESRI ARC-Scene
  • 2.5-D
  • 3-D objects (i.e. buildings)
  • Microsofts Virtual Earth
  • 2.5-D
  • birds eye
  • 3-D Objects (i.e. buildings)
  • World Wind

12
Conclusion
  • Lines are blurring between satellite-based remote
    sensing systems and aircraft-based remote sensing
    systems
  • Given the new tools for visualization and access
    of global multi-scale remote sensing data the
    idea of public domain has been overtaken by the
    idea of public access
  • This gives reason to explore licensing options
    for the IFTN project
  • High quality elevation models (DEMs) are
    essential for high accuracy orthophotography such
    that these data sets can not be discussed
    separately
  • The development of a new 5 meter TM like sensor
    should be deployed by the US government as part
    of the LSCP

13
Dr. Sean AhearnNGAC MeetingOctober 16, 2008
Write a Comment
User Comments (0)
About PowerShow.com