SNA criteria:
The following is the criteria used to select SNAs from CNDDB:
- Extremely rare species or natural communities (State Rank 1)
- Best examples of species or natural communities
- Ensemble of three or more rare species or natural communities within
500 meters of each other
The selected elements must also be less than 200,000 acres and must
be observed within the last 20 years."
"Subclass EO - Element Occurrence information. Same as the CNDDB.
Items sna.pateo
COLUMN, ITEM NAME, WIDTH, OUTPUT, TYPE, Description
25, PARTS, 7, 7, I, Number of Components
32, MAPNDX, 5, 5, C
37, EONDX, 6, 6, I, Element Occurrence index
43, ELCODE, 10, 10, C, Element Code
53, EONUM, 3, 3, I, Element Occurrence Number
56, SOURCETYPE, 1, 1, C, Original digitized feature
57, ELTYPE_CODE, 1, 1, I, Element Occurrence Type
58, ACC_CLASS, 2, 2, I, Level of mapping accuracy
60, EOCOUNT, 2, 2, I
62, YSNA, 2, 2, C, Reason element is SNA
Additional item descriptions can be found in the CNDDB metadata
(http://www.dfg.ca.gov/Nddb/meta.html)
The YSNA item hold 3 values, and describes why the element is an
SNA:
S1 = State Rank 1 - extremely rare species
BX = Best example of a species
EC = Ensemble Candidate (composing an area of high species richness
or habitat richness)
Subclass UA - Urban/Agriculture disturbance.
Items sna.patua
COLUMN, ITEM NAME, WIDTH, OUTPUT TYPE, Description
25, PRIMARY, 5, 5, I, Species cover in polygon
30, PCOV, 1, 1, I, Percent cover of species
31, INSIDE, 4, 5, B
35, SNAID, 4, 5, B, Unique id for each SNA
GAP Data resulting from reselecting for specific primary codes and
90% coverage.
Primary: Co-dominant species in vegetation type covering the largest
fraction of the polygon (primary type)
11000 series = disturbed urban
22000 series = disturbed agricultural
PCOV: Proportion of polygon covered by primary vegetation type
Subclass SNA - Significant Natural Area
Items sna.patsna
COLUMN, ITEM NAME, WIDTH, OUTPUT TYPE, N.DEC, Description
25, INSIDE, 4, 5, B
29, SNAID, 4, 5, B,-, Unique id for each SNA
33, ACRES, 8, 18, F, 3, SNA Acreage
Subclass IDEN - Identity of EOs and SNAs
Items sna.patiden
COLUMN, ITEM NAME, WIDTH, OUTPUT TYPE, Description
25, EONDX, 6, 6, I (see previous)
31, ELCODE, 10, 10, C
41, EONUM, 3, 3, I
44, YSNA, 2, 2, C
46, SNAID, 4, 5, B
50, MAPNDX, 5, 5, C
55, SITENUMB, 8, 8, C
The identity of the SNA region and the EO region. Each EO knows to
which SNA it belongs.
Subclass COSNA - County and SNA information
Items sna.patcosna
COLUMN, ITEM NAME, WIDTH, OUTPUT TYPE, Description
25, INSIDE, 4, 5, B
29, SNAID, 4, 5, B, Unique id for each SNA
33, FLAG, 1, 1, I, Site number display
34, SITENUMB, 8, 8, C, SNA site number
Flag - used to display the site number only once for a SNA that crosses
multiple counties
Subclass OWNER - Ownership information
Items sna.patowner
COLUMN, ITEM NAME, WIDTH, OUTPUT TYPE, Description
25, OWNERCODE, 5, 5, C, Code indicating ownership
30, GOVT_LEVEL, 8, 8, C, Level of Gov, None /or Private
38, AGENCY, 20, 20, C, Agency of Government
58, NAME, 50, 50, C, Specific name
108, INSIDE, 4, 5, B
112, SNAID, 4, 5, B, Unique id for each SNA
GOVTOWNA Data"
Original Data Source Information:
"Sources: DFG Natural Heritage Division
Source Media: CNDDB
Source Projection: n/a
Source Units: n/a
Source Scale: variable
Capture Method: manual digitizing, key data entry
Conversion Software: ARC/INFO rev. 7.1.2
Data Structure: Vector
ARC/INFO Coverage Type: Regions
ARC/INFO Precision: Double
Layer Size: 82 MB
Data Updated: January 1998"
"DATA CONTACTS:
Marc Hoshovsky, Biodiversity Protection Planner, DFG/NHD Sacramento
(916) 322-2446
email: mch@maphost.dfg.ca.gov
Kari Lewis, Lands Conservation Planner, DFG/NHD Sacramento
(916) 322-1869
email: klewis@kirk.dfg.ca.gov
TECHNICAL CONTACT:
Lora Konde, DFG/TSB Sacramento
(916) 445-5758
email: lkonde@dfg.ca.gov