A polyconic projection is based on a ().
A、plane tangent at one point
B、cylinder tangent at one parallel
C、cone tangent at one parallel
D、series of cones tangent at selected parallels
A、plane tangent at one point
B、cylinder tangent at one parallel
C、cone tangent at one parallel
D、series of cones tangent at selected parallels
A、A.cylindrical projection B、B.simple conic projection C、C.polyconic projection D、D.rectangular projection
A、Mercator projection B、polyconic projection C、orthographic projection D、gnomonic projection
A、Azimuthal gnomonic projection B、Lambert conformal projection C、Transverse Mercator projection D、Polyconic projection
A、azimuthal gnomonic projection B、Lambert conformal projection C、transverse Mercator projection D、polyconic projection
A、azimuthal gnomonic projection B、Lambert conformal projection C、transverse Mercator projection D、polyconic projection
A、A675>A312>A13>A10>A5; B、A675>A312>A13>A5>A10; C、A675>A13>A10>A312>A5; D、A675>A13>A312>A10>A5; E、A13>A312>A675>A10>A5。