Clinometers; Telemeters; Apparatus for recording distance; Computer programs, recorded, for use in database management, use in electronic storage of data; Directional compasses; Distance measuring apparatus; Downloadable computer programs for use in database management, use as a spread sheet, word processing; Global positioning system (GPS) apparatus; Photoelectric sensors; Recorded computer software for use in database management, use as a spreadsheet, word processing; Surveying instruments