2006-2008 PAMAP LiDAR Data of Pennsylvania (Southern Counties)

This dataset consists of classified LiDAR (Light Detection and Ranging) elevation points produced by the PAMAP Program. Additional information is available at the PAMAP website: www.dcnr.state.pa.us/topogeo/pamap.

PAMAP data are organized into blocks, which do not have gaps or overlaps, that represent 10,000 feet by 10,000 feet on the ground. The coordinate system for blocks in the northern half of the state is Pennsylvania State Plane North (datum:NAD83, units: feet); blocks in the southern half of the state are in Pennsylvania State Plane South. A block name is formed by concatenating the first four digits of the State Plane northing and easting defining the block's northwest corner, the State identifier "PA", and the State Plane zone designator "N" or "S" (e.g. 45001210PAS).

The following are the collection dates for each county chronologically from 2006-2008:

Chester : 20060321 - 20060502 ----

Cumberland : 20060406 - 20060429 ----

Dauphin : 20060406 - 20060429 & 20060321 - 20060502 ----

Delaware : 20060406 - 20060429 ----

Fayette : 20060406 - 20060429 & 20070430 ----

Franklin : 20060406 - 20060429 & 20060321 - 20060502 ----

Fulton : 20060406 - 20060429 ----

Greene : 20060406 - 20060429 ----

Huntingdon : 20060406 - 20060429 ----

Indiana : 20060406 - 20060429 ----

Juniata : 20060426 - 20060430 ----

Lancaster : 20060426 - 20060430 ----

Lawrence : 20060426 - 20060430 & 20060406 - 20060429 & 20060321 - 20060502 ----

Adams : 20070430 ----

Allegheny : 20070430 ----

Armstrong : 20070430 ----

Beaver : 20070430 ----

Bedford : 20070430 ----

Berks : 20070430 ----

Blair : 20070430 ----

Bucks : 20070430 ----

Butler : 20070430 ----

Cambria : 20070430 ----

Lebanon : 20080330 - 20080418 & 20080419 - 20080420 ----

Lehigh : 20080330 - 20080418 & 20080419 - 20080420 & 20080415 - 20080419 & 20080423 - 20080424 ----

Mifflin : 20080410 - 20080411 & 20080330 - 20080418 & 20080410 - 20080419 ----

Montgomery : 20080410 - 20080411 & 20080425 ----

Northampton : 20080410 - 20080418 & 20080402 - 20080403 & 20080321 - 20080326 ----

Perry : 20080410 - 20080419 & 20080410 - 20080418 & 20080424 & 20080415 - 20080419 ----

Philadelphia : 20080410 - 20080419 & 20080424 & 20080414 - 20080510 ----

Schuylkill : 20080414 - 20080425 & 20080414 - 20080510 & 20080321 - 20080326 ----

Snyder : 20080414 - 20080425 & 20080410 - 20080418 - 20080510 ----

Somerset : 20080414 - 20080425 & 20080410 - 20080418 & 20080321 - 20080326 ----

Washington : 20080419 - 20080420 & 20080415 - 20080419 & 20080423 - 20080424 & 20080402 - 20080403 ----

Westmoreland : 20080419 - 20080420 & 20080423 - 20080424 ----

York : 20080419 - 20080420 ----

General-purpose aerial topographic survey of the Commonwealth of Pennsylvania. LiDAR data are useful for a variety of scientific and resource management applications such as hydrologic modeling, resource monitoring, mapping, global change research, and landscape visualization. These data were used in conjunction with color aerial photography to create color digital orthophotos, raster digital elevation models, and topographic contours (2 ft interval).

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A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2574/supplemental/pa2006_2008_pamap_south_counties.KMZ

Collection reports from the vendor for this data set may be viewed at these locations:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2574/supplemental/pa2006_2008_pamap.pdf

and

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2574/supplemental/pa2006_2008_pamap_faq.pdf

LiDAR points in LAZ format

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Any conclusions drawn from the analysis of this information are not the responsibility

of PA DCRN, PAMAP, NOAA, the Office for Coastal Management or its partners.

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2574

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Users should be aware that temporal changes may have occurred since this data set was collected

and some parts of this data may no longer represent actual surface conditions. Users should not use

this data for critical applications without a full awareness of its limitations. These data

depict the heights at the time of the survey and are only accurate for that time.

The LiDAR flying height, field of view, laser repetition rate, aircraft speed,

and the maximum baseline distances from the aerial platform to the ground based

GPS stations have been fine tuned to ensure an RMSEz of the processed data at

the 18.5 cm level for the bare earth surface as required by the FEMA guidelines.

See the PAMAP Technical Proposal dated January 11, 2006 for further QA/QC procedures.

The horizontal accuracy standard follows the NSSDA-1998 standard. The maximum permissible

RMSE for 95% of the horizontal check points for the mapping product is 5 feet or better.

Independent accuracy testing was performed by Dewberry using 24 high accuracy

quality control checkpoints distributed on near level open bare terrain,

high grass, brush, forest and urban terrain. Dewberry uses testing procedures

consistent with those specified by both the NSSDA/FEMA and NDEP/ASPRS methods.

NSSDA/FEMA: (1) Compared to criteria RMSEz less than or equal to 0.61 ft in Open

Terrain, tested 0.535 ft; (2) Compared to criteria Accuracyz less than or equal

to 1.19 ft at 95% confidence level, tested 1.049 ft.

NDEP/ASPRS: (1) Compared to criteria Fundamental Vertical Accuracy less than or

equal to 1.19 ft at 95% confidence level, tested 1.049 ft; (2) Compared to

criteria Consolidated Vertical Accuracy less than or equal to 2.38 ft at 95%

confidence level, tested 1.134 ft.

Consolidated Vertical Accuracies from individual metadata reports

95% Confidence, tested

Southern PA Collections Vertical Accuracies (cm)

2006 Central South : 20.4 ----

2006 SouthWest : 27.1 ----

2006 WestCentral South : 31.7 ----

2007 North Central South : 19.2 ----

2007 South Central South : 20.7 ----

2008 Allentown : 12.2 ----

2008 Doylestown : 24.4 ----

2008 Harrisburg : 23.8 ----

2008 Hazleton : 15.2 ----

2008 Lancaster : 23.8 ----

2008 Philadelphia : 3.7 ----

2008 Pottsville : 19.5 ----

2008 Reading : 14.0 ----

2008 Selinsgrove : 7.3 ----

2008 Stroudsburg : 7.9 ----

2008 Westchester East : 29.9 ----

2008 Westchester West : 18.0 ----

2008 York : 15.2 ----

Average ---- 18.6 ----

; Quantitative Value: 0.19 meters, Test that produced the value:

The 95% confidence level could be phrased as "95% of the points meet or exceed

the specified accuracy level." This statistic provides information on the quality

of the data collection parameters (global quality). It can be calculated using

RMSE x 1.96 if the errors have a normal distribution, which most bare-earth points follow

All files are visually inspected for completeness to ensure that no gaps or misplacement

exists in the data. The files have been checked to ensure that the boundary and the

content has been covered in its entirety.

All files are inspected by the Production Manager to ensure that they conform to the

specified file naming conventions, all files load in their correct geographic position,

all files conform to the project specifications for file standard and content.