Scales

The SPIEGEL-RELASKOP® by Dr. Bitterlich

and its different scales

 

Common to all Relascope Scales:

 

All readings automatically slope-corrected

Diameter measurement within ½% of distance to tree

 

Differences between Relascope Scales:

 

AMERICAN WIDE METRIC STANDARD METRICCP
Vertical Degree Scale (-60 to +70 degrees)Vertical Percent Scales (-170 to +270 percent yes yes no yes
Topographic Scales yes no no no
Range of BAFs 5-90 ft²/ac~ 1-21 m²/ha 1-144 m²/ha~ 4-625 ft²/ac 1-4 m²/ha~ 4-17 ft²/ac 1-81 m²/ha~ 4-350 ft²/ac
Even BAFson scale 5,10,20,40,90 ft²/ac 1,4,9,16,25, etc m²/ha 1,2,4 m²/ha 1,2,3,4,9,16,25 etc m²/ha
Range of DBH measurable ½% – 9% ½% – 24% ½% – 4% ½% – 18%
Direct Height readings from these distances 66 units 4,6,8,…,20 units 20,25,30 units 100 units
CP Correction scale for rangefinding no no no yes
Rangefinding Distances Determined 66 & 99 feet*º 9 standard distances4 -20 m *¹ 15,20,25,30 meters*² direct reading with attachment*³

 

 

*º smaller values are possible with the quarter bars

*¹ with use of vertical or horizontal target, resp. Wedge Prism Attachment with vertical base

*² using RELASKOP distance scale and a vertical 2 m-target

*³ with use of horizontal staff of known length or percent scale with vertical 2 m-target or

Wedge Prism Attachment with vertical base

 

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