Insects 'R Us? I'll learn the correct method, and make Ohio proud.
Steev On Fri, Oct 3, 2008 at 11:38 PM, Edward Frank <[EMAIL PROTECTED]> wrote: > Jupiter, didn't you watch Men In Black? > > Join me in the Eastern Native Tree Society at > http://www.nativetreesociety.org > and in the Primal Forests - Ancient Trees Community at: > http://primalforests.ning.com/ > > ----- Original Message ----- > *From:* Steve Galehouse <[EMAIL PROTECTED]> > *To:* [email protected] > *Sent:* Friday, October 03, 2008 11:27 PM > *Subject:* [ENTS] Re: Measurement methodology question > > Ed- > > Thanks, as a sociology major I'm utterly baffled by any math procedures, > but at least plant i.d. comes real easy, though I'm not sure why. I'll > apprehend(confiscate) one of my kid's old calculators that gives a sine > function. > > Pop quiz: Where was Elvis Presley born?(Genus and species required) > > Steve > > On Fri, Oct 3, 2008 at 10:47 PM, Edward Frank <[EMAIL PROTECTED]> wrote: > >> Steve, >> >> No it is not the same. The % scale is designed to convert a measured >> horizontal distance to a calculated height. It is the tangent of the angle >> measured. When you use the rangefinder you are not measuring the horizontal >> distance to the tree but the direct distance from your eye to the measuring >> point. That is the hypotenuse of a right triangle. You need to use the >> sin function to convert the measured distance to a height above level of the >> measurement. So the % scale has no direct relationship to what you are >> measuring. >> >> Ed >> >> Join me in the Eastern Native Tree Society at >> http://www.nativetreesociety.org >> and in the Primal Forests - Ancient Trees Community at: >> http://primalforests.ning.com/ >> >> ----- Original Message ----- >> *From:* Steve G <[EMAIL PROTECTED]> >> *To:* ENTSTrees <[email protected]> >> *Sent:* Friday, October 03, 2008 10:35 PM >> *Subject:* [ENTS] Measurement methodology question >> >> >> ENTS >> >> I've just acquired a clinometer with both degree and percent scales. I >> understand the sine method of measuring with clinometer and laser >> rangefinder(at least I think I understand). Can I simplify an accurate >> measurement by taking rangefinder distance times % slope of >> clinometer, without translating a degree reading to a sine value? >> Intuitively it seems it should get to get to the same figure from >> different directions.--is this correct? >> >> Steve >> >> > > > --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org You are subscribed to the Google Groups "ENTSTrees" group. To post to this group, send email to [email protected] To unsubscribe send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/entstrees?hl=en -~----------~----~----~----~------~----~------~--~---
