Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XXVII - State Lands
Subpart 1 - Land Information Mapping and Map Records System
Chapter 13 - Digital Mapping Requirements
Section XXVII-1301 - General Requirements

A. The purpose of this Section is to establish guidelines and requirements for computerized digital mapping in accordance with these standards. These guidelines and requirements provide descriptions of terminology, data structure, accuracy and data exchange specifications.

B. In order to capture information for use in a digital mapping system, it is necessary to store X and Y Louisiana State Plane Coordinates (North or South Zone), including applicable vertical coordinate data, for every point that is used to define the graphic aspects of the map. Thus, a road would be represented in digital format by a number of points (X and Y coordinate pairs) that define its location. The digital mapping system would then be able to depict the road by plotting straight or curved lines between the points. The process of capturing the coordinate points and storing them in a computer or computer-readable format is called digitizing. Digitization may be accomplished by the use of coordinate geometry, by using electronic tables that record coordinate points, by manually tracing over source map information, or by using automatic scanning (digitizing) devices.

C. The digitization of planimetric and topographic base maps shall be accomplished by digital stereo-compilation of controlled aerial photography. The digitization of parcel ownership maps will be based upon existing map sources and record information combined with cartographic features derived from planimetric and topographic base map imagery.