62751
Salt Marsh Habitats, New Hampshire, 2013
Data Set
Draft
47841
C-CAP
Project
Completed
2020-08-10
Tidal wetland systems are important transitional habitats between the ocean and land. Salt marshes in particular provide essential functions and values from a human perspective. They support healthy fisheries, protect shorelines from erosion https://oceanservice.noaa.gov/facts/coastalthreat.html, reduce flooding, protect water quality, and provide essential fish and wildlife habitat. This data set is intended to establish a baseline to document statewide tidal wetland change over time. It focuses on salt marsh system response to relative sea level rise, documenting both changing quality and quantity of this habitat. Data was derived from high resolution multispectral orthoimagery collected on August 24, 2013 through the Piscataqua Region Estuaries Partnership and LiDAR data collected through the LiDAR for the NorthEast project (2011). Draft maps were created in 2015 and accuracy assessments continued until 2018.
To gauge the health and resilience of New Hampshire's coastal salt marshes and provide baseline data for detecting change over time.
NOAA Coastal Change Analysis Program (C-CAP), 2020. New Hampshire Salt Marsh Habitats 2013. National Oceanic and Atmospheric Administration (NOAA) Office for Coastal Management. Data accessed at coast.noaa.gov/landcover.
The NOAA Office for Coastal Management worked with the New Hampshire Fish and Game Department and the Great Bay National Estuarine Research Reserve (NERR) to produce this data. This data is also being served within the New Hampshire Statewide GIS Clearinghouse (NH GRANIT, http://www.granit.unh.edu/)
Theme
ISO 19115 Topic Category
imageryBaseMapsEarthCover
Theme
biota
Theme
Land Cover
Theme
Land Cover Analysis
Theme
Salt Marsh
Theme
Vector
Theme
Wetlands
Theme
Global Change Master Directory (GCMD) Science Keywords
Earth Science > Land Surface > Land Use/Land Cover
Theme
Global Change Master Directory (GCMD) Science Keywords
Earth Science > Land Surface > Land Use/Land Cover > Land Use/Land Cover Classification
Theme
Global Change Master Directory (GCMD) Instrument Keywords
Earth Remote Sensing Instruments > Passive Remote Sensing > Photon/Optical Detectors > Cameras > CAMERAS
Theme
Global Change Master Directory (GCMD) Platform Keywords
Aircraft > AIRCRAFT
Spatial
Global Change Master Directory (GCMD) Location Keywords
Ocean > North America > United States of America > New Hampshire
Spatial
Coastal Zone
Spatial
New Hampshire
Spatial
NH
Spatial
Northeast
Temporal
2013
Office for Coastal Management
Charleston
SC
Data Set
5 years
Vector
Users must assume responsibility to determine the usability of these data.
Data Steward
2020-08-10
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Great Bay National Estuarine Research Reserve and NH Coastal Program
Distributor
2020-08-10
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Great Bay National Estuarine Research Reserve and NH Coastal Program
Metadata Contact
2020-08-10
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Great Bay National Estuarine Research Reserve and NH Coastal Program
Point of Contact
2020-08-10
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Great Bay National Estuarine Research Reserve and NH Coastal Program
Ground Condition
-70.95312
-70.699409
43.228163
42.861764
Discrete
2013-08-24
No
Unclassified
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. Please acknowledge both Great Bay National Estuarine Reseach and the primary producer(s) of this dataset in any derived products.
https://coast.noaa.gov/dataviewer/#/landcover/search/where:ID=8690
Data Access Viewer
Online Resource
https://coast.noaa.gov/digitalcoast/data/ccaphighres
Online Resource
https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/hires
Online Resource
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.2.1350
According to accuracy assessment performed by the Great Bay NERR , the overall accuracy for the classification is 92.05% and 0.92 Kappa. Each class accuracy is as follows: (Producers/Users) 0 Background (N/A) 1 Unclassified (Cloud, Shadow, etc)(N/A) 5 Invasive Phragmites australis (93%/96%) 7 High Marsh; S.patens-D.spicata (98%/93%) 8 Mudflat/bare (100%/100%) 10 Open Water (100%/100%) 11 Panne and Pool (100%/95%) 14 Salt Shrub/Terrestrial Border (47%/100%) 15 High Marsh; S.alterniflora (98%/80%) 16 High Marsh; Mix (76%/100%) 19 Low Marsh (96%/100%) 22 Brackish Marsh, Native (100%/100%) 23 High Marsh; J.gerardii (94%/100%) 24 Wrack (N/A) 25 Flooded Upland Forest (50%,100%) 327 accuracy assessment points were used but only one of the classes have a minimum of 50 accuracy assessment points. While the accuracy assessment conducted does help inform us about the map's errors, there are shortcomings as an overall representation. It is hoped that a more complete field effort can be performed as part of a future update to this data.
< 1.5 FEET CE95
There was no terrain correction in the geo-referencing procedure.
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.
1
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. ORTHO 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 from the ORTHO and LIDAR sources. 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. Attributes for this product are as follows: 0 Background 1 Unclassified 5 Invasive Phragmites australis 7 High Marsh; S.patens-D.spicata 8 Mudflat /Bare 10 Open Water 11 Panne and Pool 14 Terrestrial Border 15 Short form S.alterniflora 16 High Marsh; Mix 19 Low Marsh 22 Brackish Marsh, Native 23 High Marsh; J.gerardii 24 Wrack 25 Recently Flooded Forest
2020-08-10T00:00:00
2
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: BIO_Salt_Marsh_Habitats
Entity_Type_Definition: Polygon attribute table
Entity_Type_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Class_Code
Attribute_Definition: Numeric designation for habitat class
Attribute_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 5
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 7
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 8
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 10
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 11
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
3
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 14
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 15
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 16
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 19
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 22
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 23
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 24
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: 25
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
4
Attribute:
Attribute_Label: Class_Name
Attribute_Definition: Nominal designation for habitat class
Attribute_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Phragmites australis
Enumerated_Domain_Value_Definition: Areas that are dominated by the invasive plant Phragmites australis.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: High Marsh, S.patens / D.spicata
Enumerated_Domain_Value_Definition: Any area where Spartina patens and Distichlis spicata are either sole or co-dominants.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Mudflat
Enumerated_Domain_Value_Definition:Natural mudflat exposed at low tide, can have some sparse S. alterniflora. Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Open Water
Enumerated_Domain_Value_Definition: Larger areas of water: bays, rivers, ponds.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Panne
Enumerated_Domain_Value_Definition: Other unvegetated/recent die-off area (note: some die-off areas still might contain some very sparse, stunted S. alterniflora that is clearly dying). Shallow, wet at low tide, may have algal mat, filamentous algae or flocculent matter present.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
5
Enumerated_Domain:
Enumerated_Domain_Value: Pool
Enumerated_Domain_Value_Definition: Deeper than pannes, no vegetation, steep sides, Includes natural and degraded areas.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Terrestrial border
Enumerated_Domain_Value_Definition: Infrequently flooded; Could include areas of higher elevation on marsh platform (commonly islands or linear patches next to excavated ditches); Most common: Iva frutescens, Solidago sempirvirens.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Short form S. alterniflora
Enumerated_Domain_Value_Definition: Areas of short form S. alterniflora as a monoculture, although some Salicornia sp. may be present.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: High Marsh Mix
Enumerated_Domain_Value_Definition: Any area where the dominant species include any combination of S. alterniflora, Spartina patens, and D. spicata.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Low Marsh
Enumerated_Domain_Value_Definition: Regularly flooded, dominated by tall form S. alterniflora usually found along creek or ditch edges. Other species may be present in this zone but S. alterniflora is the only dominant.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Brackish Marsh
Enumerated_Domain_Value_Definition: Any area of marsh near the upland border where brackish species (e.g., Scirpus sp., Typha angustifolia) are common or dominant.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: High Marsh, J. gerardii
Enumerated_Domain_Value_Definition: Any area where J. gerardii is either the lone dominant or is co-dominant with D. spicata or S. patens.
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Wrack
Enumerated_Domain_Value_Definition: Any area of marsh that is covered by dead wrack (generally composed of S. alterniflora stems).
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Recently flooded upland border
Enumerated_Domain_Value_Definition: Upland vegetation that has been recently killed (primarily standing dead trees) by salt water intrusion
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
6
Attribute:
Attribute_Label: Simplified
Attribute_Definition: Habitat classification scheme where marsh platform classes are aggregated into high and low marsh components.
Attribute_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Phragmites australis
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: High marsh
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Mudflat
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Open Water
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Panne and Pool
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Terrestrial border
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Low marsh
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Brackish Marsh
Enumerated_Domain_Value_Definition
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Wrack
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Enumerated_Domain:
Enumerated_Domain_Value: Recently flooded upland border
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source: NOAA's Ocean Service, Office for Coastal Management (OCM)
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Erik Hund
2020-08-13T18:56:45
Erik Hund
2020-08-14T17:44:45
Office for Coastal Management
OCM
1002
Never Published
No
2020-02-26