the peeing method. This map locates the topographic fea- 

 tures first accurately with regard to each other, and later 

 the land linos can "bo tied to the topography. The grid- 

 iron method assumes that the land lines are correct and 

 uses thorn to secure horizontal control * I?or any ot&er pur- 

 pnso than map making, the forest officer would "be myre-~lika-- 

 ly to assume that the land lines were incorrectly "run. The 

 gridiron method tios the topography to the section corners 

 a~id-the accuracy of the map depends upon tho accuracy of 

 tho original land survey* 



How clo you know that two lookout points ?7ill "be 

 ahlo to intersect accurately on a fire? To do so the points 

 must first "be accurately plottod on a nap r^nd thon protrac- 

 tion roadln^s-naclo fron oach of these points. The work of 

 ojnerving firos from lookouts is triangula-irion work, puro 



and cinple, o:id it in o"bvious that if the lookouts them- 



i 



eelvots woro 'crriel^ially locator by careful triangulation, 

 they r^ill work more in hamoii^ with each othor tjian if they 

 'WOTO located T^ir-tTQ^roT3^ fron sodrLon-c<?rners* 



% 3 to the sstimato: In this distridr wo are never 

 tho^i 0^.0 ^ump ahead off our timber salea. We have 

 o <rariiitition o? tinber-s!>out which wo iaiossr comparulrive- 

 ly little. Isn't it Bettor to nako a rapid survey of our 



130 



