3. Level Network

A level network (or level circuit) is a series of points whose elevations are to be determined as a single surveying project.

a. Configuration

Configuration has to do with the physical network design, Figure A-5. A level network is either a:

Link - the network begins and ends on different points, or,

Loop - the network closes back on itself.


 a 5
Figure A-5
Network Configuration

b. Type

Type has to do with the mathematical network design, Figure A-6. A level network is either:

Open - begins and ends on points whose elevations are either unknown or not known relative to each other on the same datum, or,

Closed - begins and ends on the same point or begins on one BM and ends on another; both BMs are referenced to the same datum.


 a 6
Figure A-6
Network Type