County Recorder Data and

Compliance With The

Cadastral Data Content Standard

The Cadastral Data Content Standard contains definitions of entities and attributes (with domains of values) and relationships among attributes in the form of a logical data model. This model is a means of expressing the definition and relationship standards for cadastral data. The intent of the Standard is to provide a consistent and uniform means of communicating cadastral information in support of the National Spatial Data Infrastructure (NSDI). In order to support the implementation of the NSDI, the cadastral information must be represented in a physical form.

The degree of compliance with the Standard can be based on the following three criteria:

Naming Conventions - Does the implementation of the Standard use the entity and attribute names listed in the Standard? To facilitate implementation, the Cadastral Subcommittee has developed standard abbreviations that can be used in all databases and applications. The abbreviations are six letters in length and are unique.

Relationships - Does the implementation of the Standard adhere to the relationships defined in the Standard? For example, the Standard specifies that Public Land Survey System (PLSS) Sections must be contained within one and only one PLSS Township.

Domain of Values - Does the implementation of the Standard use the values for the attributes as listed in the Standard? There is a domain of values listed for each attribute in the Standard. Each domain also has a free text value. If the implementation needs to add values to the domain of values listed, this should trigger a request to make adjustments or changes to the standard (a maintenance request).

The level of compliance is defined by how well implementation of the data conforms in Naming Conventions, Relationships, and Domain of Values. These possible combinations and associated levels of compliance are shown in the table below.

LEVEL OF COMPLIANCE	NAMING CONVENTIONS	RELATIONSHIPS	DOMAIN OF VALUES
Full Compliance	Yes	Yes	Yes
Structurally Compliant	Yes	Yes	No
Semantically Compliant	Yes	No	Yes
Domain Compliant	No	No	Yes

Transferability and Crosswalks - A data set or application that is transferable has completed a crosswalk to the Standard, and has the information available to a requester such that the existing data could be transferred into one of the above shown levels of compliance. The crosswalk would compare the existing information with the Standard and identify where the existing information matches the Standard information. The crosswalk would also indicate the level of compliance that could be achieved.

Back To Part Three: Using The Standard

Links To Other Parts Of The County Recorder's Module:

Part One - County Recorders And The Cadastral Data Content Standard
Part Two - County Examples
Table Of Contents - County Recorders and the Cadastral Data Content Standard

Links to the other Cadastral Courses:
Learning The Cadastral Data Content Standard
Cadastral Information For GIS Specialists
Surveyors And The Cadastral Data Content Standard

Presented by the United States Department of the Interior Bureau of Land Management, and

the Federal Geographic Data Committee Cadastral Subcommittee