| 2006 Federal Emergency Management Agency (FEMA) Topographic LiDAR: Coastal Connecticut |
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LIDAR data is remotely sensed high-resolution elevation data collected by an airborne
collection platform. By positioning laser range finding with the use of 1 second GPS
with 100hz inertial measurement unit corrections; Terrapoint's LIDAR instruments are
able to make highly detailed geospatial elevation products of the ground, man-made
structures and vegetation. The LiDAR flightlines for this project was planned for
a 50% acquisition overlap. The nominal resolution of this project without overlap
is 1.25m. Four returns were recorded for each pulse in addition to an intensity value.
GPS Week Time, Intensity, Flightline and number attributes were provided for each
LiDAR point. Data is provided as random points, in LAS v1.0 format, classified according
to ASPRS Class Code 2=Ground 1=Undefined. Water is included in the bare earth ground
model, except where the entire tile is covered by water. The following regions of
Connecticut are included in this project: Fairfield County - 130 square kilometers
New Haven - 170 square kilometers Middlesex - 29 square kilometers New London - 157
square kilometers Please note that the LiDAR intensity is not calibrated or normalized.
The intensity value is meant to provide relative signal return strengths for features
imaged by the sensor.
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