Does a different central meridian in Lambert conformal conic projection with two standard parallels make a difference in line length?
I have projected a line in GCS WGS84 TO Lambert conformal conic projection, with the standard parallel 1 = 09 and standard parallel 2 = 35. I have no idea what should be the central meridian.
The actual length is short in Lambert conformal conic projection system.
The actual Route from kathmandu to Delhi is asshown in figure below from skyvector.com and the distance is 460 nm ..............
I have drawn the same route in arcmap with in the following projection
GCS_WGS_1984 WKID: 4326 Authority: EPSG Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_WGS_1984 Spheroid: WGS_1984 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314245179 Inverse Flattening: 298.257223563
I created the following projected coordinate system according to jeppesen chart.
Asia_Lambert_Conformal_Conic_09and 35 Authority: Custom Projection: Lambert_Conformal_Conic False_Easting: 0.0 False_Northing: 0.0 Central_Meridian: 70.0 Standard_Parallel_1: 9.0 Standard_Parallel_2: 35.0 Latitude_Of_Origin: 22.0 Linear Unit: Meter (1.0)
Geographic Coordinate System: GCS_WGS_1984 Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_WGS_1984 Spheroid: WGS_1984 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314245179 Inverse Flattening: 298.257223563
I projected my line from WGS84 GCS to above Defined projected coordinate system and when I calculated the length of the line in ArcMap the line is 10 NM shorter than the actual one. I believe with the same projection as Jeppesen Chart, I should be able to get the length of line exactly as Jeppesen chart. I don't know where I am mistaken.