||Harrisburg International Airport is the
primary technology validation site for the NGS airport survey program.
We have ongoing experiments with digital photogrammetry, hyperspectral,
and LIDAR data to evaluate the usefulness of these types of data for supporting
The image at left is a shaded relief representation
of a 1 meter digital surface model (DSM) constructed by NGS engineers using
airborne LIDAR data. The spatial extent is approximately 800 by 1000 meters.
The prominent linear feature at the bottom of the image are the approach
lights at runway end 13, which are located along the north bank of the
Susquehanna River. The image at right is a 1 meter bin constructed by NGS
engineers depicting the mean LIDAR elevation measured within 1 meter groundels.
The black pixels represent 1 meter groundels with no LIDAR measurement.
The raw data were acquired in the Fall of 1998 using the NASA Airborne Topographic
Mapper II aboard a NOAA Twin Otter aircraft.
Shaded relief image of runway 13
1 meter bin of runway
13 at Harrisburg Airport
||In the Fall of 1998 and the Summer of
1999 NGS acquired AVIRIS hyperspectral data of the airport. The image below
at left is a 3 channel composite of runway end 13. The image below at right
is a segmentation designed to separate the asphalt runway from the concrete
taxiways. The yellow pixels represent an attempt to auto-identify the paint
stripes delineating the runway edges. Such classifications of hyperspectral
data may prove useful in automatically identifying aircraft ground movement
3 Channel composite
of runway 13
of runway 13
||NGS has developed a methodology to georegister
the low altitude AVIRIS data collected at Harrisburg Airport. Once the
data has been accurately positioned, data from other sensors can be merged
with the AVIRIS data. The images below show a pixel level data fusion of
the runway using AVIRIS channel 24, a LIDAR shaded relief image, and a
LIDAR TIN depicting heights. For best results, the image should be viewed
3D high definition glasses.
Pixel level data fusion
at Harrisburg Airport
images to see a full resolution view
Oceanic and Atmospheric Administration
National Ocean Service
/ National Geodetic Survey
Remote Sensing Division
This page updated on
March 28, 2000