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FALSE
Jefferson_Watershed_2018
1209030.638094
1462501.729803
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621249.081704
1
3.035
002
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Montana_FIPS_2500_Feet
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20200116
16202800
20200116
16202800
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
3.035
vector digital data
2018-02-28
Quantum Spatial
517 SW 2nd St., Suite 400
Corvallis
OR
97333
US
541-752-1204
http://www.quantumspatial.com
Quantum Spatial
Jefferson_Watershed_2018
Jefferson River Watershed LiDAR
2017-10-24T00:00:00
2017-10-27T00:00:00
2.006646
155.267536
Provide support for high resolution terrain elevation data from the Jefferson River Watershed LiDAR dataset.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This shapefile represents the 3D building footprints contained within the Jefferson River Watershed LiDAR Study Area. The LiDAR derived average building heights of each structure as well as the lowest adjacent gradient value (LAG) are provided within each polygon. The horizontal datum for this dataset is NAD83 (2011), the vertical datum is NAVD88, Geoid 12A, and the data is projected in Montana State Plane. Horizontal units are in International Feet and vertical units are in US Survey Feet. Quantum Spatial collected the Jefferson River Watershed LiDAR data for Montana Department of Natural Resources and Conservation between 10/24/2017 and 10/27/2017.</SPAN></P></DIV></DIV></DIV>
Montana Department of Natural Resources and Conservation
Light Detection and Ranging
LiDAR
3D Building Footprints
Shapefile
Jefferson River
Montana
Light Detection and Ranging, LiDAR, Boundary, Shapefile
Jefferson River
Montana
This data is projected in Montana State Plane
Steve Story
Montana Department of Natural Resources and Conservation
1424 9th Ave.
Helena
Montana
59620-1601
sestory@mt.gov
US
(406) 444-6816
Please contact Montana Department of Natural Resources and Conservation for information regarding the use of this data.
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9273
1
-112.485734
-111.465208
45.936271
45.230956
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.
Shaded relief images have been visually inspected for data errors such as pits, border artifacts, and shifting. LiDAR flightlines have been examined to ensure consistent elevation values across overlapping flightlines. The Root Mean Square Error (RMSE) of line to line relative accuracy for this dataset is 0.097 ft. Please see the LiDAR data report for a discussion of the statistics related to this dataset.
Data was examined at a 1:2000 scale. Relative accuracy of the flightlines was assessed in Microstation using TerraMatch.
RMSE
ft_i
0.097 ft
The final Non-vegetated Vertical Accuracy (NVA) of the Jefferson River Watershed dataset, tested at 95% confidence level is 0.302 ft. Please see the LiDAR data report for a discussion of the statistics related to this dataset.
Non-vegetated Vertical Accuracy was assessed using 23 ground check points. These check points were not used in the calibration or post processing of the LiDAR point cloud data.
NVA
ft_i
0.302 ft
The final Vegetated Vertical Accuracy (VVA) of the Jefferson River Watershed dataset evaluated at the 95th percentile is 0.330 ft. Please see the LiDAR data report for a discussion of the statistics related to these datasets.
Vegetated Vertical Accuracy was assessed using 15 VVA check points. These check points were not used in the calibration or post processing of the LiDAR point cloud data.
VVA
ft_i
0.330 ft
Acquisition. Quantum Spatial collected the Jefferson River Watershed LiDAR data between 10/24/2017 and 10/27/2017. The survey used a Leica ALS80 laser system mounted in a Cessna Caravan 208B. 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: 0.354 m
AGL: 1700 m
Speed: 105 - 125 knots
FOV: 36°
Scan frequency: 45 hz
Pulse rate: 325 kHz
Pulse duration: 2.5 ns
Pulse width: 75 cm
Wavelength: 1064 nm
Pulses in air mode: Multiple Pulses in Air
Beam divergence: 22 mrads
Swath width: 1105 m
Overlap: 63%
2017-10-31T00:00:00
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 and Leica Cloudpro 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.
2017-10-31
Jefferson_Watershed_2018
Feature Class
0
Jefferson River Watershed Building Polygons
Quantum Spatial
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
GISFLOOD.FLOOD_DO.Jefferson_Watershed_2018.area
GISFLOOD.FLOOD_DO.Jefferson_Watershed_2018.area
Double
8
13
6
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
area
area
Double
14
13
6
area
QSI
area in square feet
LAG
LAG
Double
8
13
6
Lowest Adjacent Gradient
QSI
Lowest adjacent gradient in US survey feet
Height
Height
Double
8
38
8
Easting
Easting
Double
8
38
8
Shape.STArea()
Shape.STArea()
Double
0
0
0
Shape.STLength()
Shape.STLength()
Double
0
0
0
Northing
Northing
Double
8
38
8
dataset
Esri
8.0.1
0
Simple
FALSE
0
TRUE
TRUE