TZH_SCSFBAY_current

File Geodatabase Feature Class

Tags
transition zone, wetland, estuary, sea level rise, climate change, conservation, marsh, ecotone


Summary

This shapefile represents  the distribution of potential tidal marsh-upland transitional zone habitats (aka ecotones) within South and Central San Francisco Bay and ranks their restoration potential for assisting with tidal marsh ecosystem conservation. The dataset  is designed to assist land managers in prioritizing transitional geography (i.e. land surfaces with the proper elevation) based on their potential value to the protection and restoration of the San Francisco Bay Estuary. The dataset is a component of a larger DSS, which includes maps of transition zone distributions under SLR and  a document providing a functional definition for transition zones. This dataset and  DSS can also assist users to account for the landward migration of transitional habitats in response to projected sea level rise (SLR). The dataset can also be used to prioritize sites for habitat enhancement, restoration and creation.

Description

see  http://climate.calcommons.org/dataset/san-francisco-bay-estuarine-terrestrial-transitional-zone-decision-support-system  for more information.
The DSS includes 3 major components: (1) GIS models of the current and future (2050 - 61cm SLR and 2100 - 167cm SLR) distribution of transitional habitat patches, based on documented tidal elevations, at the landscape level; (2) GIS models of ranked (existing and potential) transitional habitats based on site specific indicators of patch “quality” for restoration; and (3) a technical document that describes and characterizes transitional habitat based on how it can support the ecological functions of the tidal marsh ecosystem . This toolkit will help managers allocate limited resources on site prioritization, alternative/scenario evaluation, and includes considerations for the influence of future climate change and land-use scenarios.
With the help of tidal marsh ecosystem specialists throughout the region we drafted a thorough description of tidal marsh-terrestrial transitional habitats. This document characterizes the physical and biological properties of upland transitions with respect to the functions of the tidal marsh ecosystem and needs of obligate fauna. A list of habitat indicators and GIS metrics were developed based on these functions, which were utilized to map their distribution and assess their quality (see Thomson 2013 and Fulfrost and Thomson 2015 available at link above). The six primary indicators identified include (metrics listed below):
1. Elevation in relation to tides (needed for plant community, high tide refugia for obligate fauna,and SLR adaptation)
2. Depth and slope of transitional zone (distance needed by tidal marsh fauna and flora, SLR adaptation)
3. Size and Shape (as needed by tidal marsh fauna and flora, overall estuarine function)
4. Adjacent Habitats and Connectivity (as needed by tidal marsh fauna and flora, overall estuarine function)
Not Mapped
5. Plant Community (as need for high tide refugia, overall estuarine function)
6. Soils and Hydrology (as needed by tidal marsh flora, overall estuarine function) 
Although most indicators were mapped throughout the estuary, our pilot study focused on the South Bay (San Francisco Bay). Work is currently underway to complete the DSS for San Pablo and Suisun Bays (including transition zone distribution and SLR projections for the entire bay) and to provide a series of improved rankings for habitat enhancement, restoration and creation.

Credits

Brian Fulfrost, Brian Fulfrost and Associates (BFA)
David Thomsom, San Francisco Bay Observatory (SFBBO)

Use limitations

Extent

West -122.517398   East -121.889989
North 37.997816   South 37.387418

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata ▼►

Topics and Keywords  ▼►

Themes or categories of the resource  biota, environment


* Content type  Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

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Citation  ▼►

* Title TZH_SCSFBAY_current


Presentation formats  * digital map


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Citation Contacts  ▼►

Responsible party 
Individual's name Brian Fulfrost
Organization's name Brian Fulfrost and Associates


Contact information  ▼►
Phone 
Voice 8315667686

Address 
Type 
e-mail address bfaconsult@gmail.com

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Resource Details  ▼►

Dataset languages  * English (UNITED STATES)
Dataset character set  utf8 - 8 bit UCS Transfer Format


Spatial representation type  * vector


* Processing environment  Version 6.2 (Build 9200) ; Esri ArcGIS 10.4.1.5686


Credits
Brian Fulfrost, Brian Fulfrost and Associates (BFA)
David Thomsom, San Francisco Bay Observatory (SFBBO)

ArcGIS item properties 
* Name TZH_SCSFBAY_current
* Location file://\\BFACONSULT\C$\Temp\TZH_SFBay_DSS.gdb
* Access protocol Local Area Network

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Extents  ▼►

Extent 
Geographic extent 
Bounding rectangle 
Extent type  Extent used for searching
* West longitude -122.517398
* East longitude -121.889989
* North latitude 37.997816
* South latitude 37.387418
* Extent contains the resource Yes

Extent in the item's coordinate system 
* West longitude 542718.960000
* East longitude 597466.000000
* South latitude 4138420.000000
* North latitude 4205684.320700
* Extent contains the resource Yes

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Resource Points of Contact  ▼►

Point of contact 
Individual's name Brian Fulfrost
Organization's name Brian Fulfrost and Associates


Contact information  ▼►
Phone 
Voice 8315667686

Address 
Type 
e-mail address bfaconsult@gmail.com

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Spatial Reference  ▼►

ArcGIS coordinate system 
* Type Projected
* Geographic coordinate reference GCS_North_American_1983
* Projection NAD_1983_UTM_Zone_10N
* Coordinate reference details 
Projected coordinate system 
Well-known identifier 26910
X origin -5120900
Y origin -9998100
XY scale 10000
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 26910
Well-known text PROJCS["NAD_1983_UTM_Zone_10N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-123.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26910]]

Reference system identifier 
* Value 26910
* Codespace EPSG
* Version 7.8.2(3.0.1)


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Spatial Data Properties  ▼►

Vector  ▼►
* Level of topology for this dataset  geometry only


Geometric objects 
Feature class name TZH_SCSFBAY_current
* Object type  composite
* Object count 53391

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ArcGIS Feature Class Properties 
▼►
Feature class name TZH_SCSFBAY_current
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 53391
* Spatial index TRUE
* Linear referencing FALSE

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Lineage  ▼►

Lineage statement
rocessing Steps

Step #1: Tidal Elevations
We first mapped  the distribution of potential transition zone throughout the study area based on tidal elevations associated with functioning transitional zone habitat. The mapped distribution of potential transition zone was based on combining (a) high resolution Lidar with (b) spatial models of MHHW and HOWL and then identifying tidal elevations associated with transitional zone habitat (>= .3 m above MHHW to HOWL + .27 m).

Step #2:  Habitat Quality
Each transition zone polygon identified was then ranked according to a series of 7 metrics representing the indicators of habitat quality ( see Thomson 2013 and Fulfrost and Thomson 2015). Metrics include:

1. Width - measured as mean width of the polygon (30 meters was considered threshold) and weighted by size of polygon (index values can be both positive or negative)
2. Size and Shape - measured by minimum bounding circle and weighted by area of polygon
(Index values can be both positive and negative)

3. Adjacent Tidal Wetland - measured as the size of adjacent tidal wetlands and weighted by the length of the shared boundary
4. Adjacent Freshwater Wetland - measured as the size of adjacent non-tidal wetlands and weighted by the length of the shared boundary
5. Adjacent Upland - measured as the size of adjacent upland land cover types and weighted by the length of the shared boundary

6. Adjacent Urban Area- measured as the size of adjacent urbanized land cover and weighted by the length of the shared boundary (index values are negative)
7. Adjacent Agricultural - measured as the size of adjacent agricultural land cover and weighted by the length of the shared boundary (Index values are negative)

Step #3: Development (within polygon)
The percentage of each transition zone polygon that was “undeveloped”was measured using  urban land use classes at the parcel level . Polygons with larger undeveloped areas were given higher values for this metric. 

Step #4: Tidal or Non Tidal
Each transition zone polygon was identified  as either being within a tidal (50 points) or non tidal (25 points) location using a mask provided by Point Blue. Non tidal areas were also mapped and ranked  in order to account of potential marsh migration and restoration potential. 

Step #5
Rankings of restoration value (and categories from extremely low to high) are assigned relative to all the  potential transition sites mapped within the study area. The final restoration index values (restidx) was calculated as:

(a) sum of the 10 metric indices  (100+ points)  + 
+
(b) development index (50 points)
+ 
(c) tidal (50 points) or non-tidal (25 points) index


GIS users can filter sites based not only on the sum total ranking but also user defined criteria (eg undeveloped, tidal, habitat adjacency, etc.) for individual metrics or sets of metrics.

The 10 fields within the attribute table that represent habitat metrics (steps 2-4) and final restoration index (step 5) contain index values. Please email Brian Fulfrost (bfaconsult@gmail.com) if you would also like the measurement values associated with each of these metrics (I’m happy to provide them). 


Data Sources:

NOAA (C-CAP), CDFW, (CalVeg), NOAA/USGS (2m Lidar), NOAA (tides and currents), AMBAG/MTC (parcel land use), SFEI (BAARI),  GreenInfo (CPAD), Point Blue (tidal/non-tidal mask)

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Distribution format 

* Name File Geodatabase Feature Class


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Fields 
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Details for object TZH_SCSFBAY_current 
					▼►
* Type Feature Class
* Row count 53391


Field OBJECTID
 
		▼►
* Alias OBJECTID
* 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.



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Field Shape
 
		▼►
* Alias Shape
* Data type Geometry
* Width 0
* Precision 0
* Scale 0
* Field description
Feature geometry.

* Description source
Esri

* Description of values
Coordinates defining the features.



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Field Id_2
 
		▼►
* Alias Id_2
* Data type Integer
* Width 4
* Precision 0
* Scale 0


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Field RecID
 
		▼►
* Alias RecID
* Data type Double
* Width 8
* Precision 0
* Scale 0


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Field Shape_Length
 
		▼►
* Alias Shape_Length
* Data type Double
* Width 8
* Precision 0
* Scale 0
* Field description
Length of feature in internal units.

* Description source
Esri

* Description of values
Positive real numbers that are automatically generated.



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Field Shape_Area
 
		▼►
* Alias Shape_Area
* Data type Double
* Width 8
* Precision 0
* Scale 0
* Field description
Area of feature in internal units squared.

* Description source
Esri

* Description of values
Positive real numbers that are automatically generated.



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Field UpIndex
 
		▼►
* Alias UpIndex
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the size of adjacent upland land cover types  weighted by the length of the shared boundary.

values range from 0 to 30

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Field UrbIndex
 
		▼►
* Alias UrbIndex
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the size of adjacent upland urbanized land cover types  weighted by the length of the shared boundary. Urbanized land cover types tend to degrade habitat and serve as a source of higher predation on obligate fauna. Values are negative (or zero).

values range from -30 to 0

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Field WidthIndex
 
		▼►
* Alias WidthIndex
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index Value representing measurement of mean width of the polygon (30 meters was considered threshold)  weighted by size of polygon


values range from -10 to 30

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Field tideidx
 
		▼►
* Alias tideidx
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the size of adjacent tidal wetland habitat weighted by the length of the shared boundary. 

Values range from 0 to 40


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Field nontidalidx
 
		▼►
* Alias nontidalidx
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the size of adjacent freshwater wetland habitat weighted by the length of the shared boundary.

values range from 0 to 10

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Field shapeindex
 
		▼►
* Alias shapeindex
* Data type Integer
* Width 4
* Precision 0
* Scale 0
Field description
Index Value representing measured by minimum bounding circle weighted by area of polygon



values range from -10 to 10

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Field agindex
 
		▼►
* Alias agindex
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the size of adjacent agriculture land cover types  weighted by the length of the shared boundary.

values range from -15 to 0

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Field protindex
 
		▼►
* Alias protindex
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
The percentage of the area (as a fraction of 1) that is within a protected area.

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Field tidalidx
 
		▼►
* Alias tidalidx
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index value if it is within (50) a tidal area or withina nontidal area (25).

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Field landuse2
 
		▼►
* Alias landuse
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Index Value representing measurement of the percentage of undeveloped (vs open space/undeveloped) land withim  the polygon.

values range from 0 to  50

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Field tidalindex
 
		▼►
* Alias tidalindex
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
Indicates whether the polygon si within a tidal or nontidal location.

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Field rest2
 
		▼►
* Alias restidx
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
The sum of all metrics index values represnting Total Restoration Potential of each polygon. 

Values range from 0 to 200 (+/-).

Values from 0 to 100 represent low restoration potential.

Values from 100 to 200 represent moderate to high restoration potential.

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Field category
 
		▼►
* Alias category
* Data type String
* Width 50
* Precision 0
* Scale 0


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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 2016-12-28


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2016-06-23 00:13:11
Last modified in ArcGIS for the item 2016-12-28 18:21:39


Automatic updates
Have been performed Yes
Last update 2016-12-28 18:21:39


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Metadata Contacts 
				▼►
Metadata contact 

Individual's name Brian Fulfrost
Organization's name Brian Fulfrost and Associates


Contact information 
▼►
Phone 

Voice 8315667686

Address 

Type 
e-mail address bfaconsult@gmail.com

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Thumbnail and Enclosures 
			▼►
Thumbnail 

Thumbnail type 
JPG

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FGDC Metadata (read-only) ▼►

Entities and Attributes  ▼►

Detailed Description
Entity Type
Entity Type Label TZH_SCSFBAY_current

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 Id_2

Attribute
Attribute Label RecID

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.

Attribute
Attribute Label UpIndex
Attribute Definition
Index Value representing measurement of the size of adjacent upland land cover types weighted by the length of the shared boundary. values range from 0 to 30

Attribute
Attribute Label UrbIndex
Attribute Definition
Index Value representing measurement of the size of adjacent upland urbanized land cover types weighted by the length of the shared boundary. Urbanized land cover types tend to degrade habitat and serve as a source of higher predation on obligate fauna. Values are negative (or zero). values range from -30 to 0

Attribute
Attribute Label WidthIndex
Attribute Definition
Index Value representing measurement of mean width of the polygon (30 meters was considered threshold) weighted by size of polygon values range from -10 to 30

Attribute
Attribute Label tideidx
Attribute Definition
Index Value representing measurement of the size of adjacent tidal wetland habitat weighted by the length of the shared boundary. Values range from 0 to 40

Attribute
Attribute Label nontidalidx
Attribute Definition
Index Value representing measurement of the size of adjacent freshwater wetland habitat weighted by the length of the shared boundary. values range from 0 to 10

Attribute
Attribute Label shapeindex
Attribute Definition
Index Value representing measured by minimum bounding circle weighted by area of polygon values range from -10 to 10

Attribute
Attribute Label agindex
Attribute Definition
Index Value representing measurement of the size of adjacent agriculture land cover types weighted by the length of the shared boundary. values range from -15 to 0

Attribute
Attribute Label protindex
Attribute Definition
The percentage of the area (as a fraction of 1) that is within a protected area.

Attribute
Attribute Label tidalidx
Attribute Definition
Index value if it is within (50) a tidal area or withina nontidal area (25).

Attribute
Attribute Label landuse2
Attribute Definition
Index Value representing measurement of the percentage of undeveloped (vs open space/undeveloped) land withim the polygon. values range from 0 to 50

Attribute
Attribute Label tidalindex
Attribute Definition
Indicates whether the polygon si within a tidal or nontidal location.

Attribute
Attribute Label rest2
Attribute Definition
The sum of all metrics index values represnting Total Restoration Potential of each polygon. Values range from 0 to 200 (+/-). Values from 0 to 100 represent low restoration potential. Values from 100 to 200 represent moderate to high restoration potential.

Attribute
Attribute Label category

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