1. Architectural Drafting Unit 2
Terms & Definitions
Architectural Drafting
Unit 2

2. Tract
A defined area of land

3. Plat
Map of a given tract of land or subdivision

4. Site
The general locality wherein the lot is situated

5. Property survey
Legal document prepared by surveyor which includes dimensions of lot

6. Topographic survey
Representation of natural and man-made features of the lot such as existing trees, drives, and water

7. Plot plan
Drawing which contains information from property survey and topographic survey

8. Elevation
Vertical distance above or below sea level

9. Benchmark
Point of known elevation serving as a reference

10. Contour lines
Lines which connect points having the same elevation to indicate slope
NOTE:Widely spaced contour lines indicate a gradual slope, while tightly spaced lines indicate a steep slope

11. Orientation
The direction a given wall faces

12. Utility easement (U/E)
Right of a company to cross portions of property with utilities and to maintain and service their equipment
NOTE: These include water, gas, electric, sewer, and telephone

13. Building line (B/L)
A line parallel to the property line determining the allowable building area

14. Azimuth
Direction from North or South up to 360 measured in degrees, minutes, and seconds

15. Bearing
Direction measured from North or South towards East or West up to 90 in degrees, minutes, and seconds

16. Altitude angle
Angle formed by the rays of the sun and the Earth’s surface

17. Protective covenant
A written agreement to provide the orderly development of a tract