Abstract: An interlocking block for interacting with other like blocks including a body having at least a front face, a rear face, a top face, a bottom face and a pair of side faces. The bottom face can have a plurality of substantially identical parallel transverse indentations but only in the bottom face. The grooves can have a constant cross-section and are spaced apart evenly between the front face and the rear face. There may be at least two substantially identical protrusions only on the top face, each protrusion being parallel with and in vertical alignment with one of the indentations, and receivable within a indentation of a like block. There are fewer protrusions than indentations.

Abstract: A relational and spatial database management system and method designed to more accurately and efficiently generate and manage relational and spatial databases for commercial and/or personal use. The invention generally comprises one or more sensor devices, a computer, and software. The invention may be deployed on a portable computer thereby allowing a user to operate the system in the field and gather data while moving around. The software is configurable and programmable for many different applications. The software system can simultaneously take inputs from one or more sensor devices, record the inputs in a relational and/or spatial database, and display the data in a form that is easy to manipulate. The Graphical User Interface displays a visual presentation of the form alongside a map of the geographic location of interest where data is being collected.