Salt Marsh Habitats, New Hampshire, 2013
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:58107 | Updated: July 3, 2023 | Published / External
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Summary
Short Citation
Office for Coastal Management, 2025: Salt Marsh Habitats, New Hampshire, 2013, https://www.fisheries.noaa.gov/inport/item/58107.
Full Citation Examples
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).
Distribution Information
No Distributions available.
Access Constraints:None
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.
Controlled Theme Keywords
imageryBaseMapsEarthCover, LAND USE/LAND COVER, LAND USE/LAND COVER CLASSIFICATION
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-71° W,
-70.6° E,
43.25° N,
42.85° S
2013-08-24
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
|
| ISO 19115 Topic Category |
imageryBaseMapsEarthCover
|
| UNCONTROLLED | |
| 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 |
Instrument Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Instrument Keywords |
CAMERAS
|
Platform Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Platform Keywords |
Airplane > Airplane
|
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
| 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
| 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
| 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
| 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
| W° Bound: | -71 | |
|---|---|---|
| E° Bound: | -70.6 | |
| N° Bound: | 43.25 | |
| S° Bound: | 42.85 |
Extent Group 1 / Time Frame 1
| 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
| URL: | https://coast.noaa.gov/dataviewer/#/landcover/search/where:ID=8690 |
|---|---|
| Name: | Data Access Viewer |
| URL Type: |
Online Resource
|
URL 2
| URL: | https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/marshhabitat/ |
|---|---|
| URL Type: |
Online Resource
|
URL 3
| 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
| 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: | 2023-07-03 17:07+0000 |
| Metadata Record Published: | 2020-09-10 |
| Owner Org: | OCM |
| Metadata Publication Status: | Published Externally |
| Do Not Publish?: | N |
| Metadata Last Review Date: | 2020-09-10 |
| Metadata Review Frequency: | 1 Year |
| Metadata Next Review Date: | 2021-09-10 |