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Re: differenct values between Map Coordinate Converter and envi_convert_projection_coordinates [message #75485]

Fri, 11 March 2011 13:33

caf.pang
Messages: 4
Registered: June 2007

Junior Member

On Mar 11, 4:31 pm, Pang Yong <caf.p...@gmail.com> wrote:
> Dear Folks,
>
> There is tens of meters difference between Map Coordinate Converter
> and envi_convert_projection_coordinates when I try to conver from
> State Plane system to UTM system. Would you please help me out?
> Setting in Map Coordinate Converter:
> First Coordinate:
> Proj : State Plane (North Carolina)
> Datum: North America 1983
> Second Coordinate:
> Proj : UTM, Zone 16 North
> Datum: WGS-84
>
> Code for envi_convert_projection_coordinates
> iproj = ENVI_PROJ_CREATE(/State_Plane,datum='NAD83', zone=3200)
> oproj = ENVI_PROJ_CREATE(/utm,datum='WGS 84',zone=16)
> ixmap = [568543.280000]
> iymap = [620005.240000]
>
> envi_convert_projection_coordinates, ixmap, iymap, iproj, oxmap,
> oymap, oproj
> Test value: x 568543.2800, y 620005.2400
> Map Coordinate Converter out value: x 790506.3042, y 3917483.1830
> envi_convert_projection_coordinates out: x 790522.86, y 3917290.2
>
> Thanks,
> Yong

Please note the unit is Feet in State Plane and meter in UTM.

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Re: differenct values between Map Coordinate Converter and envi_convert_projection_coordinates

By: caf.pang on Fri, 11 March 2011 13:33

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