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how to composite a mapcoord object using geographic coordinate(no projection) [message #87675]

Sat, 22 February 2014 01:45

Jie Zhou
Messages: 27
Registered: February 2014

Junior Member

I want to display a image using selectabledrawwidget. The image hold geographic coordinate (GTCP code 100). When I try to add map grid or outline on the display, I should set a mapcoord for the display. But as I know, the mapcoord definition does not support geographic projection. So anyone know how to process it? or is there any other object can finish the work?
THanks,
Jie

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Re: how to composite a mapcoord object using geographic coordinate(no projection) [message #87677 is a reply to message #87675]

Sat, 22 February 2014 05:24

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jie Zhou writes:

> I want to display a image using selectabledrawwidget. The image hold geographic coordinate (GTCP code 100). When I try to add map grid or outline on the display, I should set a mapcoord for the display. But as I know, the mapcoord definition does not support geographic projection. So anyone know how to process it? or is there any other object can finish the work?

I added the Geographic "projection" to the MapCoord object for you this
morning. You can find it here:

http://www.idlcoyote.com/programs/catalyst/source/coordinate s/mapcoord__
define.pro

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: how to composite a mapcoord object using geographic coordinate(no projection) [message #87754 is a reply to message #87677]

Wed, 26 February 2014 04:36

Jie Zhou
Messages: 27
Registered: February 2014

Junior Member

On Saturday, February 22, 2014 2:24:48 PM UTC+1, David Fanning wrote:
> Jie Zhou writes:
>
>
>
>> I want to display a image using selectabledrawwidget. The image hold geographic coordinate (GTCP code 100). When I try to add map grid or outline on the display, I should set a mapcoord for the display. But as I know, the mapcoord definition does not support geographic projection. So anyone know how to process it? or is there any other object can finish the work?
>
>
>
> I added the Geographic "projection" to the MapCoord object for you this
>
> morning. You can find it here:
>
>
>
>
>
> http://www.idlcoyote.com/programs/catalyst/source/coordinate s/mapcoord__
>
> define.pro
>
>
>
> Cheers,
>
>
>
> David
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")

Hi David,
Your new released Mapcoord file which try to include the geographic projection may have some thing wrong. The line 906, a geographic projection cannot be set a center_longitude keyword.

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Re: how to composite a mapcoord object using geographic coordinate(no projection) [message #87755 is a reply to message #87754]

Wed, 26 February 2014 05:20

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jie Zhou writes:

> Your new released Mapcoord file which try to include the geographic projection may have some thing wrong. The line 906, a geographic projection cannot be set a center_longitude keyword.

What version of IDL are you using? I have no problem with this at all. I
think the Geographic "projection" was a fairly recent addition. Can you
send me the exact error message.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: how to composite a mapcoord object using geographic coordinate(no projection) [message #87757 is a reply to message #87755]

Wed, 26 February 2014 05:27

Jie Zhou
Messages: 27
Registered: February 2014

Junior Member

On Wednesday, February 26, 2014 2:20:25 PM UTC+1, David Fanning wrote:
> Jie Zhou writes:
>
>
>
>> Your new released Mapcoord file which try to include the geographic projection may have some thing wrong. The line 906, a geographic projection cannot be set a center_longitude keyword.
>
>
>
> What version of IDL are you using? I have no problem with this at all. I
>
> think the Geographic "projection" was a fairly recent addition. Can you
>
> send me the exact error message.
>
>
>
> Cheers,
>
>
>
> David
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")

I use the IDL 8.0.1. The error message just said: the geographic projection does not center_longitude keyword. It worked after I remove the keyword.

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Re: how to composite a mapcoord object using geographic coordinate(no projection) [message #87759 is a reply to message #87757]

Wed, 26 February 2014 05:34

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Jie Zhou writes:

> I use the IDL 8.0.1. The error message just said: the geographic projection does not center_longitude keyword. It worked after I remove the keyword.

Well, don't know. Same code worked perfectly here. You can try it
yourself another way:

struct = map_proj_init('geographic', center_longitude=90)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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