Dioptra

Dioptra is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Surveyors Land

North American Industry Classification System (NAICS) Categories:

• Surveying And Mapping (Except Geophysical) Services > Surveying Services, By Subject > Surveyors Land

Standard Industry Classification (SIC) Categories:

• Surveying Services > Surveying Services, By Subject > Surveyors Land