LiDAR-Derived Percent Slope - NH

Type  Raster Dataset

Tags  elevation, slope, elevation, LiDAR, New Hampshire, percent slope, United States, Northeast, New England, New Hampshire

Summary

This data set estimates the percent slope for pixels in the raster dataset, and is one of a suite of topographic datasets available from
NH GRANIT that convey the shape of the Earth's surface.

Description

This data set represents a 5-meter resolution LiDAR-derived percent slope layer for New Hampshire. It was generated
from a statewide Esri Mosaic Dataset which comprised 8 separate LiDAR collections that covered the state as of January, 2020. The Mosaic Dataset
was used as input to the ArcGIS Spatial Analyst "Slope" geoprocessing tool which calculates the percent slope for each cell of the input raster,
in this case, the statewide mosaic dataset.

Credits

LiDAR-Derived Percent Slope - NH, 2020, Earth System Research Center, University of NH (https://granit.unh.edu)

Use limitations

Please cite NH GRANIT (See Data_Set_Credit). Not for Legal use.

Extent

West  -72.728316     East -70.522623
North  45.330379     South 42.296598

Scale Range

Topics and Keywords  ▼►

Themes or categories of the resource Elevation

Content type ⇔ Downloadable Data


Theme keywords elevation

Thesaurus ▼►
Title ISO 19115 Topic Categories

Theme keywords slope, elevation, LiDAR, New Hampshire, percent slope

Place keywords United States, Northeast, New England, New Hampshire

Citation  ▼►

Title LiDAR-Derived Percent Slope - NH
Publication date 2021-05-08

Presentation formats digital map
FGDC geospatial presentation format raster digital data

Other citation details 
None


Citation Contacts  ▼►

Responsible party - originator 
Organization's name Earth Systems Research Center, University of New Hampshire

Responsible party - publisher 
Organization's name Earth Systems Research Center, University of New Hampshire

Contact information ▼►
Address 
Delivery point Durham, New Hampshire

Resource Details  ▼►

Dataset languages ⇔ English (UNITED STATES)

Status completed
Spatial representation type grid

Supplemental information 
One companion data set representing slope in degrees(LiDAR_Derived_Slope_Degree_NH.img)is also available from NH GRANIT.

Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.6.1; Esri ArcGIS Pro 2.3.3

Credits 
LiDAR-Derived Percent Slope - NH, 2020, Earth System Research Center, University of NH (https://granit.unh.edu)

ArcGIS item properties 
Name ⇔ LiDAR_Derived_Slope_Percent_NH.img
Location ⇔ file://R:\Imagery\LiDAR\DerivedData\LiDAR_Derived_Slope_Percent_NH.img
Access protocol ⇔ Local Area Network

Extents  ▼►

Extent 
Geographic extent 
Bounding rectangle 
West longitude -72.728316
East longitude -70.522623
North latitude 45.330379
South latitude 42.296598
Extent contains the resource Yes

Extent 
Description 
Publication Date

Temporal extent 
Beginning date 2011-05-06
Ending date 2021-05-08

Extent 
Geographic extent 
Bounding rectangle 
Extent type 
Extent used for searching
West longitude ⇔ -72.728316
East longitude ⇔ -70.522623
North latitude ⇔ 45.330379
South latitude ⇔ 42.296598
Extent contains the resource ⇔ Yes

Extent in the item's coordinate system 
westBL ⇔ 711187.294272
eastBL ⇔ 1278508.994272
southBL ⇔ -72245.174935
northBL ⇔ 1031738.837565
exTypeCode ⇔ Yes

Resource Points of Contact  ▼►

Point of contact - point of contact 
Individual's name NH GRANIT Database Manager
Organization's name Earth Systems Research Center
Contact's position Database Manager

Contact information ▼►
Phone 
Voice 603-862-1214
Fax 603-862-0188
Address 
Type both
Delivery point Morse Hall, University of New Hampshire
City Durham
Administrative area NH
Postal code 03824
Country US
e-mail address granit@unh.edu
Hours of service 
8:30AM-5PM, EST

Resource Maintenance  ▼►

Resource maintenance 
Update frequency not planned

Resource Constraints  ▼►

Constraints 
Limitations of use 
Please cite NH GRANIT (See Data_Set_Credit). Not for Legal use.

Legal constraints 
Limitations of use 
Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited
source materials. Earth Systems Research Center, under contract to the NH Office of Strategic Initiatives, and in
consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these
data. OSI, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of
these data.

Spatial Reference  ▼►

ArcGIS coordinate system 
Type ⇔ Projected
Geographic coordinate reference ⇔ GCS_NAD_1983_2011
Projection ⇔ NAD_1983_2011_StatePlane_New_Hampshire_FIPS_2800_Ft_US
Coordinate reference details ⇔ 
ProjectedCoordinateSystem 
WKID 103104
XOrigin -17463700
YOrigin -48257000
XYScale 137246076.82899535
ZOrigin -100000
ZScale 10000
MOrigin -100000
MScale 10000
XYTolerance 0.0032808333333333331
ZTolerance 0.001
MTolerance 0.001
HighPrecision true
LatestWKID 6525
WKT PROJCS["NAD_1983_2011_StatePlane_New_Hampshire_FIPS_2800_Ft_US",GEOGCS["GCS_NAD_1983_2011",DATUM["D_NAD_1983_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",984250.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-71.66666666666667],PARAMETER["Scale_Factor",0.9999666666666667],PARAMETER["Latitude_Of_Origin",42.5],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",6525]]

Reference system identifier 
Value ⇔ 6525
Codespace ⇔ EPSG
Version ⇔ 8.2.10(10.3.1)


Spatial Data Properties  ▼►

Georectified Grid ▼►
Number of dimensions 2

Axis dimensions properties - row (y-axis) 
Dimension size 67299
Resolution ⇔ 
16.404167 ftUS

Axis dimensions properties - column (x-axis) 
Dimension size 34584
Resolution ⇔ 
16.404167 ftUS

Cell geometry ⇔ area
Point in pixel ⇔ center

Transformation parameters are available ⇔ Yes

Check points are available ⇔ No

Corner points 
Point ⇔ 711187.294272 -72245.174935

Point ⇔ 711187.294272 1031738.837565

Point ⇔ 1278508.994272 1031738.837565

Point ⇔ 1278508.994272 -72245.174935

Center point ⇔ 994848.144272 479746.831315

ArcGIS Raster Properties ▼►
General Information 
Pixel depth ⇔ 32
Compression type ⇔ None
Number of bands ⇔ 1
Raster format ⇔ IMAGINE Image
Source type ⇔ continuous
Pixel type ⇔ signed integer
No data value ⇔ -2.1474836e+09
Has colormap ⇔ No
Has pyramids ⇔ Yes

Spatial Data Content  ▼►

Image Description 
Type of information ⇔ image

Band information 
Description ⇔ Layer_1
Maximum value ⇔ 883.000000
Minimum value ⇔ 0.000000
Number of bits per value ⇔ 32

Data Quality  ▼►

Scope of quality information ▼►
Resource level dataset

Data quality report - Quantitative attribute accuracy  ▼►
Data quality measure reference
Measure description 
The critical attribute of this data is the raster cell percent slope, the absolute accuracy of which has been affected by a number of
processing steps. The original LiDAR elevation source DEMs had a 0.7 - 2 meter or better nominal post spacing (GSD).

Quality evaluation procedure
Evaluation method 
None

Quantitative test results 
Value Signed Integer

Data quality report - Conceptual consistency  ▼►
Data quality measure reference
Measure description 
None

Data quality report - Completeness omission  ▼►
Data quality measure reference
Measure description 
Data are complete for the State of New Hampshire, and reflect the content of the source datasets.

Lineage  ▼►

Process step ▼►
When the process occurred 2021-05-07
Description 
The ArcGIS "Slope" geoprocessing tool was applied to BAREERTHDEM along with the "PERCENT_RISE" option to generate an interim slope layer. The
interim slope layer was then projected to the NH Stateplane spatial reference system.

Source data ▼►
Relationship to the process step used

Source citation ▼►
Alternate titles BAREERTHDEM

Source data ▼►
Relationship to the process step produced

Source citation ▼►
Alternate titles percentSlope

Source data ▼►
Description 
Input LiDAR DEM

Source medium name digital data

Source citation ▼►
Title Coastal New Hampshire 2011 LiDAR collection
Alternate titles Coastal_LiDAR_DEM
Publication date 2011

Responsible party - originator 
Organization's name Photo Science, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2011-05-06
Ending date 2011-06-30

Source data ▼►
Description 
Input LiDAR DEM

Source medium name digital data

Source citation ▼►
Title USGS Connecticut River NH State Plane LiDAR
Alternate titles Connecticut_River_LiDAR_DEM
Publication date 2016

Responsible party - originator 
Organization's name Quantum Spatial, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2015-10-24
Ending date 2016-04-29

Source data ▼►
Description 
Input LiDAR DEM

Source medium name digital data

Source citation ▼►
Title TERRAIN, Merrimack HUC 8 Watershed, Massachusetts and New Hampshire
Alternate titles Merrimack_LiDAR_DEM
Publication date 2012-09-14

Responsible party - originator 
Organization's name Federal Emergency Management Agency

Extent of the source data 
Description 
ground condition

Temporal extent 
Date and time 2012-09-14

Source data ▼►
Description 
Input LiDAR DEM

Source medium name digital data

Source citation ▼►
Title TERRAIN, Nashua, Massachusetts
Alternate titles Nashua_LiDAR_DEM
Publication date 2011-07-15

Responsible party - originator 
Organization's name Federal Emergency Management Agency

Extent of the source data 
Description 
ground condition

Temporal extent 
Date and time 2011-01-28

Source data ▼►
Description 
LiDAR DEM

Source medium name digital data

Source citation ▼►
Title Umbagog NH/ME 2016 LiDAR
Alternate titles Umbagog_LiDAR_DEM
Publication date 2018-08-30

Responsible party - originator 
Organization's name Quantum Spatial, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2016-04-06
Ending date 2018-05-24

Source data ▼►
Description 
LiDAR DEM

Source medium name digital data

Source citation ▼►
Title White Mountain National Forest Lidar (USGS Contract: G10PC00026 Task Order Numbers: G10PD01309 and G10PD00088)
Alternate titles WMNF_2011_LiDAR_DEM
Publication date 
Indeterminate date inapplicable

Responsible party - originator 
Organization's name Photo Science, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2010-11-11
Ending date 2012-04-19

Source data ▼►
Description 
LiDAR DEM

Source medium name digital data

Source citation ▼►
Title White Mountain National Forest Lidar (USGS Contract: G10PC00026 Task Order Numbers: G12PD00775)
Alternate titles WMNF_2012_LiDAR_DEM
Publication date 
Indeterminate date inapplicable

Responsible party - originator 
Organization's name Photo Science, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2012-11-06
Ending date 2012-11-17

Source data ▼►
Description 
LiDAR DEM

Source medium name digital data

Source citation ▼►
Title G14PD01014 - White Mountain National Forest3 LiDAR - FY2014
Alternate titles WMNF_2014_LiDAR_DEM
Publication date 2015-04-10

Responsible party - originator 
Organization's name Quantum Spatial, Inc.

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2014-10-28
Ending date 2014-11-06

Source data ▼►
Description 
Bare earth DEM

Source medium name digital data

Source citation ▼►
Title LiDAR_Bare_Earth_DEM_NH.img
Alternate titles BAREERTHDEM
Publication date 2019

Responsible party - originator 
Organization's name Earth Systems Research Center, University of New Hampshire

Extent of the source data 
Description 
ground condition

Temporal extent 
Beginning date 2011-05-06
Ending date 2018-05-24

Geoprocessing history  ▼►

Process 
Date 2021-05-07 10:07:39
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Image Analyst Tools.tbx\RasterCalculator
Command issued
RasterCalculator Int(Plus( "LiDAR_Derived_Slope_Percent_NH_utm.img",0.5)) R:\Imagery\LiDAR\DerivedData\LiDAR_Derived_Slope_Percent_NH.img
Include in lineage when exporting metadata No

Distribution  ▼►

Distributor ▼►
Contact information - distributor 
Individual's name NH GRANIT Database Manager
Organization's name Earth Systems Research Center
Contact's position NH GRANIT Database Manager

Contact information ▼►
Phone 
Voice 603-862-1214
Fax 603-862-0188
Address 
Type both
Delivery point Morse Hall, University of New Hampshire
City Durham
Administrative area NH
Postal code 03824
Country US
e-mail address granit@unh.edu
Hours of service 
8:30AM-5PM, EST

Available format 
Name ERDAS .img file

Technical prerequisites Ability to read/import ERDAS img format.

Ordering process 
Terms and fees No charge when downloaded from the Internet.

Transfer options 
Transfer size 9325.0

Online source 
Online location (URL) Network_Resource_Name: <URL:https://granit.unh.edu>

Distribution format 
Name ⇔ Raster Dataset

Transfer options 
Online source 
Online location (URL) <URL:https://ftp.granit.sr.unh.edu/GRANIT_Data/Raster_Data/LiDAR_Derived_percentSlope/>

Fields  ▼►

Details for object LiDAR_Derived_Slope_Percent_NH.img.vat ▼►
Type ⇔ Table
Row count ⇔ 656

Field OID ▼►
Alias ⇔ OID
Data type ⇔ OID
Width ⇔ 4
Precision ⇔ 0
Scale ⇔ 0

Field description ⇔ 
Internal feature number.

Description source ⇔ 
Esri

Description of values ⇔ 
Sequential unique whole numbers that are automatically generated.

Field Value ▼►
Alias ⇔ Value
Data type ⇔ Integer
Width ⇔ 10
Precision ⇔ 10
Scale ⇔ 0


Field Count ▼►
Alias ⇔ Count
Data type ⇔ Double
Width ⇔ 19
Precision ⇔ 0
Scale ⇔ 0


Overview Description 
Entity and Attribute Overview 
Data represents percent slope values for New Hampshire.

Entity and Attribute Detail Citation 
Cell values percent slope

Metadata Details  ▼►

Metadata language ⇔ English (UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format

Scope of the data described by the metadata dataset
Scope name ⇔ dataset

Last update 2021-05-08 

ArcGIS metadata properties
Metadata format ArcGIS 1.0

Created in ArcGIS for the item 2021-05-07 10:07:39
Last modified in ArcGIS for the item 2022-05-05 13:26:02

Automatic updates
Have been performed Yes
Last update 2022-05-05 13:26:02

Metadata Contacts  ▼►

Metadata contact - point of contact 
Individual's name NH GRANIT Database Manager
Organization's name Earth Systems Research Center
Contact's position NH GRANIT Database Manager

Contact information ▼►
Phone 
Voice 603-862-1214
Fax 603-862-0188
Address 
Type physical
Delivery point 8 College Rd
City Durham
Administrative area New Hampshire
Postal code 03824
Country US
e-mail address granit@unh.edu