1、单标准纬线等面积圆锥投影rg=1a = sin βPoapapo+sC=1no2roN。cosPo = N.ctgPoroPosin Poaapo+SoC2
1、单标准纬线等面积圆锥投影 0 a = sin 1 0 0 0 = = r a n 0 0 0 0 0 0 0 sin cos N ctg N a r = = = 0 2 0 2 S a C = + S a C = + 2 2
2、双标准纬线等面积圆锥投影P=n?=nz =]n==1n222Z2a(C - S2)= r22a(C - S)= r2Ta:2(S, - S2)
2、双标准纬线等面积圆锥投影 1 2 2 2 P = n1 = n = ( ) ( ) 1 2 2 2 2 2 2 2 2 2 = − = − = = r a C S r C S a a r a n ( ) 2 2 1 1 a C − S = r ( ) 2 2 2 2a C − S = r ( ) 1 2 2 2 2 1 2 S S r r a − − =
apF21P, =n :p, =raap2 = 2(C-S)C--S,aaapiap2C+S2S22S02p? = ? +(St -S)= P +(S -S)aa
= = 1 r a n a r1 1 = a r2 2 = ( ) 1 2 1 2 C S a = − ( ) 2 2 2 2 C S a = − 2 2 2 1 2 1 2 2 S a S a C = + = + ( ) (S S) a S S a = + − = + 2 − 2 1 2 2 1 2 2 2 (C S ) a = − 2 2
正轴等面积割圆锥投影的主要公式apiap2ri-r2+SCa222(Si -S2)S=aap2 = p +=(S - S)= p2 + 2(S - S)x=p.-pcos8,y=psin81aP=1 ,41M=72 =Q4n
正轴等面积割圆锥投影的主要公式 = a • ( ) (S S) a S S a = + − = + 2 − 2 1 2 2 1 2 2 2
2、双标准纬线等面积圆锥投影P2 = 470P1 = 250a=0.5771091.C=46077317K日t1520°25°30°35°40°45°50°55°0.9615+0.9328+1.0000+1.0121+1.01811.0170+1.0070+0.9859*0.9511*I1.04041.0175+1.00000.98800.98220.9833+0.9931+1.0143*1.0514+ne21°59°1°23°203'5°44**4°30°*0°00's1°52°0°48°1°38°
2、双标准纬线等面积圆锥投影 0 1 = 25 0 2 = 47