Who are we?
We are the Idaho Conservation
Housed within the Idaho
Department of Fish & Game.
Member of a national network of
Natural Heritage Programs called
NatureServe. Member programs
exist in all 50 states.
Conservation Data Center
Idaho Fish and Game
The Idaho Conservation Data
Center collects, analyzes,
maintains, and disseminates
scientific information necessary
for the management and
conservation of Idaho’s biological
Receive data from a variety of sources:
• Herbaria/Museum Specimens
• Rare Plant / Animal Observation Forms
• Published Scientific Journals
• Unpublished resources
– Botanist / Biologist field notes
What is an Element Occurrence?
• An Element Occurrence (EO) is an area of
land and/or water in which a species or
natural community is, or was present.
• An EO should have practical conservation
value for the species.
Element Occurrence Record
• data management tool
• has both spatial and tabular
components including a mappable
feature and associated data
EO Representations (EORep)
• Are polygons
• Incorporate Locational Uncertainty
• Developed from Source Features (points,
lines, and/or polygons)
• Can be comprised of multiple features
circle polygon polygon
What does an EORep look like?
Circular Polygon Linear Polygon
Contains Voids Noncontiguous Areas
noncontiguous areas Contiguous Areas
differing contiguous areas
Review of Terminology
Element Occurrence (EO) – The area on the
ground that represents what you actually
Element Occurrence Record (EOR) – The data
record of what you saw.
Element Occurrence Representation (EORep)
– The spatial representation (in polygon form)
of what you saw.
• Mapping each location accurately and entering data from a variety
of sources can be challenging.
CDC data management tool
• Mapper: Enables us to “map”
locations digitally using ArcView 3.2
• Tracker: Relational database using
• Reporting using Crystal Reports.
BIOTICS - Tracker
BIOTICS - Mapper
• Whoa, that looks different!
• We want points!
• This is a mess!
• How am I going to display this?
Why the data look this way
• EOReps are polygons to incorporate
• Locational uncertainty is affected by:
– survey techniques and equipment
– expertise of collector
– amount and type of information
High Locational Uncertainty
• EO can occur anywhere within the buffered circle.
• Vague location information provided.
Medium Locational Uncertainty
As the quality of the data increases the Locational
Low Locational Uncertainty
Very precise data enable precise mapping
Why is this so important?
• Querying points returns only 1 EO.
• Querying polygons indicates that possibly
3 EO’s are present.
Displaying EO Information
Use the legend to define by unique values.
AA, AM, PM, PD, PG, etc.
Shelley Cooke 287-2737
Angie Schmidt 287-2716