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14401600
1.0
FGDC CSDGM Metadata
FALSE
Jefferson_County_2019
1200765.543256
1366756.305033
562877.526150
855063.760695
1
1.621
002
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Montana_FIPS_2500_Feet
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20200116
16192100
20200116
16192100
150000000
5000
FGDC
Quantum Spatial
517 SW 2nd St., Suite 400
Corvallis
OR
97333
US
541-752-1204
http://www.quantumspatial.com
Quantum Spatial
Quantum Spatial
20200116
1
Feature Class
Steve Story
Montana Department of Natural Resources and Conservation
1424 9th Ave.
Helena
Montana
59620-1601
sestory@mt.gov
US
(406) 444-6816
1.621
vector digital data
2019-09-26T00:00:00
Quantum Spatial
517 SW 2nd St., Suite 400
Corvallis
OR
97333
US
541-752-1204
http://www.quantumspatial.com
Quantum Spatial
Jefferson_County_2019
Provide support for high resolution terrain elevation data from the Jefferson County dataset.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This shapefile represents the 3D building footprints contained within the Jefferson County LiDAR Building Study Area. The LiDAR derived average building heights and lowest adjacent gradient (LAG) of each structure are provided with each polygon. The horizontal datum for this dataset is NAD83 (2011), the vertical datum is NAVD88, Geoid 12B, and the data is projected in Montana State Plane. Horizontal units are in international feet. Vertical units are in US Survey feet. Quantum Spatial collected the Jefferson County LiDAR data for Montana DNRC Water Resources Division between 09/25/2018 and 07/19/2019.</SPAN></P></DIV></DIV></DIV>
Montana DNRC Water Resources Division
Light Detection and Ranging
LiDAR
Building Polygons
Shapefile
Montana
Silver Star
Whitehall
Cardwell
Silver Bow
Wilow Creek
Three Forks
Manhattan
Radersburg
Jefferson
Boulder
Basin
Butte
Deer Lodge
Jefferson City
Clancy
Montana City
Helena
Helena West Side
Helena Valley Southeast
Winston
Light Detection and Ranging, LiDAR, Building, Footprint, Shapefile
Montana
Silver Star, Whitehall, Cardwell, Silver Bow, Wilow Creek, Three Forks, Manhattan, Radersburg, Jefferson, Boulder, Basin, Butte, Deer Lodge, Jefferson City, Clancy, Montana City, Helena, Helena West Side, Helena Valley Southeast, Winston
This data is projected in Montana State Plane
Steve Story
Montana DNRC Water Resources Division
1424 9th Ave.
Helena
Montana
59620-1601
sestory@mt.gov
US
(406) 444-6816
Please contact Montana DNRC Water Resources Division for information regarding the use of this data.
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9273
1
-112.554017
-111.859179
46.570142
45.753302
Jefferson County LiDAR
2018-09-25T00:00:00
2019-07-19T00:00:00
3.075254
65.536524
The Non-vegetated Vertical Accuracy (NVA) of this dataset, tested at 95% confidence level is 0.261 ft (0.080 m). Please see the LiDAR data report for a discussion of the statistics related to this dataset.
Non-vegetated Vertical Accuracy was assessed using 136 ground check points. These check points were not used in the calibration or post processing of the LiDAR point cloud data.
NVA
ft_i
0.261 ft (0.080 m)
The Vegetated Vertical Accuracy (VVA) of this dataset, evaluated at the 95th percentile is 0.902 ft (0.275 m). Please see the LiDAR data report for a discussion of the statistics related to this dataset.
Vegetated Vertical Accuracy was assessed using 84 VVA check points. These check points were not used in the calibration or post processing of the LiDAR point cloud data.
VVA
ft_i
0.902 ft (0.275 m)
1. Flightlines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Laser point return coordinates were computed using Waypoint Inertial Explorer v.8.6 and Leica Cloudpro v.1.2.4 software based on independent data from the LiDAR system, IMU, and aircraft. 3. The raw LiDAR file was assembled into flightlines per return with each point having an associated x, y, and z coordinate. 4. Visual inspection of swath to swath laser point consistencies within the study area were used to perform manual refinements of system alignment. 5. Custom algorithms were designed to evaluate points between adjacent flightlines. Automated system alignment was computed based upon randomly selected swath to swath accuracy measurements that consider elevation, slope, and intensities. Specifically, refinement in the combination of system pitch, roll, and yaw offset parameters optimize internal consistency.
6. Noise (e.g., pits and birds) was filtered using post-processing software, based on known elevation ranges and included the removal of any cycle slips. 7. Using TerraScan and Microstation, ground classifications utilized custom settings appropriate to the study area. 8. The corrected and filtered return points were compared to the ground survey points collected to verify the vertical accuracy. 9. Buildings were extracted using automated routines. The average height above ground of the structure was applied as the PolygonZ value.
2018-03-09T00:00:00
Acquisition. Quantum Spatial collected the Jefferson County LiDAR data between 09/25/2018 and 07/19/2019. The survey used a Leica ALS80 and a Riegl VQ1560i laser system mounted in a Cessna Caravan. Ground level GPS and aircraft IMU were collected during the flight. Sensor: Leica ALS80
Maximum returns: Unlimited
Nominal pulse density: 8 pulses/m^2
Nominal pulse spacing: 0.35 m
AGL: 1600 m
Speed: 140 knots
FOV: 30°
Scan frequency: 46 hz
Pulse rate: 345 kHz
Pulse duration: 3.0 ns
Pulse width: 35.2 cm
Wavelength: 1064 nm
Pulses in air mode: Multi Pulse in Air (2PiA)
Beam divergence: 0.22 mrads
Swath width: 857 m
Overlap: 60%
Sensor: Leica ALS80
Maximum returns: Unlimited
Nominal pulse density: 2 pulses/m^2
Nominal pulse spacing: 0.71 m
AGL: 2300 m
Speed: 140 knots
FOV: 30°
Scan frequency: 44 hz
Pulse rate: 240 kHz
Pulse duration: 3.0 ns
Pulse width: 50.6 cm
Wavelength: 1064 nm
Pulses in air mode: Multi Pulse in Air (2PiA)
Beam divergence: 0.22 mrads
Swath width: 1,232 m
Overlap: 30%
Sensor: Riegl VQ1560i
Maximum returns: Unlimited
Nominal pulse density: 2 pulses/m^2
Nominal pulse spacing: 0.71 m
AGL: 2300 m
Speed: 140 knots
FOV: 58.5°
Scan frequency: Uniform Point Spacing
Pulse rate: 350 kHz
Pulse duration: 2.5 ns
Pulse width: 41.4 cm
Wavelength: 1064 nm
Pulses in air mode: Multi Times Around (MTA)
Beam divergence: 0.18 mrads
Swath width: 2,576 m
Overlap: 20%
2019-07-19T00:00:00
This shapefile was created by extracting LiDAR derived average elevations and applying them to each building polygon within the dataset.
LiDAR data has been collected and processed for all areas within the project study area.
Flight plans are designed with sufficient sidelap to ensure there are no gaps between flightlines. Shaded relief images have been visually inspected for gaps.
Jefferson_County_2019
Feature Class
0
Jefferson County LiDAR derived building footprints
Quantum Spatial
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
area_sq_ft
area_sq_ft
Double
8
18
6
AVG_HEIGHT
AVG_HEIGHT
Double
8
18
6
MIN_LAG
MIN_LAG
Double
8
18
6
Shape.STArea()
Shape.STArea()
Double
0
0
0
Shape.STLength()
Shape.STLength()
Double
0
0
0
dataset
Esri
8.0.1
0
Simple
FALSE
0
TRUE
TRUE