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Short Citation:
Office for Coastal Management, 2022: Salt Marsh Habitats, New Hampshire, 2013, https://www.fisheries.noaa.gov/inport/item/58107.

Item Identification

Title: Salt Marsh Habitats, New Hampshire, 2013
Status: Completed
Publication Date: 2019-10-28
Abstract:

This data set consists of salt marsh habitats for the state of New Hampshire derived from high resolution (1ft) imagery collected on August 24, 2013. This data set relied on 4 Band multispectral aerial orthoimagery acquired by the Piscataqua Region Estuaries Partnership and LiDAR data collected through the LiDAR for the NorthEast project (2011).

Purpose:

To gauge the health and resilience of New Hampshire's coastal salt marshes and provide baseline data for detecting change over time.

Other Citation Details:

Recommended Citation.***** Data accessed at *****.

Supplemental Information:

Attributes for this product are as follows:

0 Background,

1

2

3

4

5 Invasive Phragmites australis,

6

7 S.patens / D.spicata,

8 Mud flat /Bare,

9

10 Open water,

11 Pannes and Pools,

12

13 Salicornia spp.,

14 Salt marsh terrestrial border,

15 Short form S. alterniflora,

16 High Marsh, S. alterniflora / Lower salt meadow mixture,

17

18

19 Low Marsh,

20

21

22 Brackish Meadow,

23 High Marsh, J. gerardii,

24 Wrack,

25 Recently Flooded Upland Border

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER > LAND USE/LAND COVER CLASSIFICATION
UNCONTROLLED
Global Change Master Directory (GCMD) Instrument Keywords Earth Remote Sensing Instruments > Passive Remote Sensing > Photon/Optical Detectors > Cameras > CAMERAS
Global Change Master Directory (GCMD) Platform Keywords Aircraft > AIRCRAFT
ISO 19115 Topic Category imageryBaseMapsEarthCover
None Biota
None Remotely Sensed Imagery/Photos
None Salt Marsh
None Wetlands

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
Global Change Master Directory (GCMD) Location Keywords Ocean > North America > United States of America > New Hampshire
None Coastal Zone
None New Hampshire
None NH

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Note:

5 years

Data Presentation Form: Image (digital)
Distribution Liability:

Users must assume responsibility to determine the usability of these data.

Support Roles

Data Steward

CC ID: 885354
Date Effective From: 2019-11-08
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 885356
Date Effective From: 2019-11-08
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 885357
Date Effective From: 2019-11-08
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 885355
Date Effective From: 2019-11-08
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Acquisition date of the NAIP imagery

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 885367
W° Bound: -71
E° Bound: -70.6
N° Bound: 43.25
S° Bound: 42.85

Extent Group 1 / Time Frame 1

CC ID: 885366
Time Frame Type: Discrete
Start: 2013-08-24

Spatial Information

Spatial Representation

Representations Used

Grid: No

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

URLs

URL 1

CC ID: 885358
URL: https://coast.noaa.gov/dataviewer/#/landcover/search/where:ID=8690
Name: Data Access Viewer
URL Type:
Online Resource

URL 2

CC ID: 885359
URL: https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/marshhabitat/
URL Type:
Online Resource

URL 3

CC ID: 885360
URL: https://coast.noaa.gov/digitalcoast/data/ccaphighres
URL Type:
Online Resource

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.2.1350

Data Quality

Accuracy:

According to accuracy assessment performed by the Great Bay NERR , the overall accuracy for the classification is % and Kappa. There were 353 total points distributed across the state. The accuracy of each class is as follows (Producer's, User's accuracies):

Invasive Phragmites australis (%, %)

High Marsh, S.patens / D.spicata (%, %)

Mud flat /Bare (%, %)

Open Water (%, %)

Pannes and Pools (%, %)

Salicornia (%, %)

Salt marsh terrestrial border (%, %)

S. alterniflora (%, %)

High Marsh, S. alterniflora / Lower salt meadow mixture (%, %)

Low marsh (%, %)

Brackish (%, %)

High Marsh, J. gerardii (%, %)

Wrack (%, %)

Recently Flooded Upland Border(%, %)

Overall accuracy (%)

Conceptual Consistency:

Tests for logical consistency indicate that all row and column positions in the selected latitude/longitude window contain data. Conversion and integration with vector files indicates that all positions are consistent with earth coordinates covering the same area. Attribute files are logically consistent.

Lineage

Process Steps

Process Step 1

CC ID: 885364
Description:

This data set was created by NOAA Office of Coastal Management (NOAA OCM) to include multiple vegetation communities that individually and collectively indicate aspects of marsh health.

This section outlines the classification procedure for the New Hampshire Salt Marsh Habitats map. This product was developed through a partnership between Great Bay NERR and the NOAA OCM.

The product was derived from high resolution 4 band digital imagery in combination with derivatives from LiDAR data. The mapping methodology employed an Object Based Image Analysis (image segmentation) approach.

Data Preparation: The aerial imagery was supplied to NOAA OCM by Great Bay NERR. Orthoimagery during low tide on August 24, 2013 was pre-processed into spectral indices and band derivatives. LiDAR data collected through the LiDAR for the NorthEast project (2011) were processed into elevation models, surface models and tidal layers. Field Data Collection: Field samples were collected prior to (July 2016) the mapping effort.

Salt Marsh Extent Classification: Image segmentation was performed in Trimble's eCognition Developer software package. The resulting image objects or segments were classified using modeling routines which leveraged existing wetland datasets acquired from the state of New Hampshire. Boundaries were refined using spectral and elevation information. The final extent was used to focus the supervised habitat classification process.

Salt Marsh Habitat Classification: A new set of image objects were derived within the salt marsh extent boundary. The resulting image objects classified into habitat classes using a Random Forest classifier. Logical rule sets and contextual modeling were used to improve, and refine the habitat classification. Anomalies in the classification that were not addressed through the automated processes were corrected through manual editing.

Review and Map Finalization: Once various stages of the salt marsh extent and habitat classification processing were completed, the resulting maps were provided to the Great Bay NERR and other local experts for comments. The majority of the resulting feedback was incorporated to improve the final habitat dataset.

Process Date/Time: 2019-11-01 00:00:00

Catalog Details

Catalog Item ID: 58107
GUID: gov.noaa.nmfs.inport:58107
Metadata Record Created By: Erik Hund
Metadata Record Created: 2019-10-29 10:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2021-11-30 16:27+0000
Metadata Record Published: 2020-09-10
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Review Frequency: 1 Year