How LiDAR Classification Works
NORTH CAROLINA LIDAR 2014-2015 Status Update January 14, 2015
STATEWIDE PHASES
In Progress
Acquired
LIDAR SPECIFICATIONS Collection • The 2014 LiDAR data collection will meet 2 points per square meter standard with nominal post spacing of 0.7 meters. • All data will include multi-return and intensity values. • Data collected will support a 9.25 cm (3.36 inches) RMSEz and 18.13 cm FVA based on NDEP guidelines.
CLASSIFICATION
Class 1 2 3 4 5 6 7 9 12 13 14 17 18 25
Description Processed Unclassified Ground Low Veg/Strata Medium Veg/Strata High Veg/Strata Buildings (Automated) Noise (High/Low) Water (Hydro Cleaned Areas) Flight Line Overlap Bridge Roads Overlap Default Overlap Ground Overlap Water
LIDAR CLASSIFICATION
Un-Classified Data Ground/Bare Earth
Vegetation
Buildings
Roads/Impervious
DELIVERABLES
Elevation
Classification
LAS Point files Terrain Datasets Digital Elevation Models
Profile
Intensity
RGB Composite LiDAR 3D Fly through
LIDAR 2014
STATE SPECIFICATIONS This project has set up an In Situ Calibration Range
▫ flown by each sensor to check horizontal and vertical Accuracy of the collection. ▫ gives the teams the capability of adjusting the sensors to match on another ▫ USGS is flying as well
Calibration Range
2014 COLLECTION Phase 1 USGS Collection Lots 6-8 and 10 have been delivered to NC and “Up Classed” to the NC classification specifications. NC is in the process of QC for this class Lots 9, 12,13,15 have been QC’ed and will be delivered to NC shortly Lots 11 and 14 are still in review by USGS.
2014 COLLECTION Phase 2 NC Collection 15 counties final LAS files have been accepted. Derivative products now being produced: Intensity imagery Terrain Datasets Metadata Dems 5 counties corrected in final QC from NC
LIDAR 2015
PLAN FOR 2015
3.5 million appropriated by the General Assembly based on value to the state 1 million paid by NCDOT.
PLAN FOR 2015
Quantum will collect North section Woolpert will collect the southern section. Collection has begun. Validation ranges are in progress.
What do you see????
What do you see????
NEIGHBORHOOD PROFILE
BACK YARD EXAMPLES
NO RETURNS This is often found on very dark roofing. Just like an asphalt road the point will not collect correctly and there fore not returned with the data
VEHICLES
CLOVERLEAF
UTILITY PROFILE
USS NORTH CAROLINA
QUESTIONS???
Hope Morgan GIS Manager- GTM NC Emergency Management [email protected] 919-825-2336 (o)
STATEWIDE PHASES
In Progress
Acquired
LIDAR SPECIFICATIONS Collection • The 2014 LiDAR data collection will meet 2 points per square meter standard with nominal post spacing of 0.7 meters. • All data will include multi-return and intensity values. • Data collected will support a 9.25 cm (3.36 inches) RMSEz and 18.13 cm FVA based on NDEP guidelines.
CLASSIFICATION
Class 1 2 3 4 5 6 7 9 12 13 14 17 18 25
Description Processed Unclassified Ground Low Veg/Strata Medium Veg/Strata High Veg/Strata Buildings (Automated) Noise (High/Low) Water (Hydro Cleaned Areas) Flight Line Overlap Bridge Roads Overlap Default Overlap Ground Overlap Water
LIDAR CLASSIFICATION
Un-Classified Data Ground/Bare Earth
Vegetation
Buildings
Roads/Impervious
DELIVERABLES
Elevation
Classification
LAS Point files Terrain Datasets Digital Elevation Models
Profile
Intensity
RGB Composite LiDAR 3D Fly through
LIDAR 2014
STATE SPECIFICATIONS This project has set up an In Situ Calibration Range
▫ flown by each sensor to check horizontal and vertical Accuracy of the collection. ▫ gives the teams the capability of adjusting the sensors to match on another ▫ USGS is flying as well
Calibration Range
2014 COLLECTION Phase 1 USGS Collection Lots 6-8 and 10 have been delivered to NC and “Up Classed” to the NC classification specifications. NC is in the process of QC for this class Lots 9, 12,13,15 have been QC’ed and will be delivered to NC shortly Lots 11 and 14 are still in review by USGS.
2014 COLLECTION Phase 2 NC Collection 15 counties final LAS files have been accepted. Derivative products now being produced: Intensity imagery Terrain Datasets Metadata Dems 5 counties corrected in final QC from NC
LIDAR 2015
PLAN FOR 2015
3.5 million appropriated by the General Assembly based on value to the state 1 million paid by NCDOT.
PLAN FOR 2015
Quantum will collect North section Woolpert will collect the southern section. Collection has begun. Validation ranges are in progress.
What do you see????
What do you see????
NEIGHBORHOOD PROFILE
BACK YARD EXAMPLES
NO RETURNS This is often found on very dark roofing. Just like an asphalt road the point will not collect correctly and there fore not returned with the data
VEHICLES
CLOVERLEAF
UTILITY PROFILE
USS NORTH CAROLINA
QUESTIONS???
Hope Morgan GIS Manager- GTM NC Emergency Management [email protected] 919-825-2336 (o)
