topic Re: The world from space projection in Mapping Questions

The world from space projection

Anonymous User — Thu, 30 Jun 2011 06:07:08 GMT

Original User: alinard

Hi,
I want to show the overview map using "The world from space" projection. I used it in older versions of ArcGIS without any problems (despite it was very slow), but in ArcGIS 10 I can't get the full extent of the world. It is somehow "cut off", more less along a great elliptic line (see attached images).
Any clues, what I am doing wrong? I try different lat/lon origin values, the problem remains the same.
Any help would be appreciated,
Jan

Re: The world from space projection

MelitaKennedy — Thu, 30 Jun 2011 20:43:21 GMT

Hi Jan,

Is the problem in the main map or layout data frame, or in the overview window? I haven't yet been able to reproduce the problem in the data frame, and am still trying to get the overview window to work at all!

Thanks,
Melita

Re: The world from space projection

Anonymous User — Fri, 01 Jul 2011 05:42:13 GMT

Original User: alinard

Hi Melita,

I think the problem is solved. After several tests I realized that the background data was already projected into "The world from space" projection (with certain lat/lon of center values) to speed up the display (see your reply: http://forums.esri.com/Thread.asp?c=93&f=984&t=281277).

This seems to clip all the data, which is not visible in this particular extent! This may be realized only when you change the lat / lon of center coordinates in the data frame.

In other words, the data projected into "The world from space" projection can only be used with the original lat / lon of center values.

Is it a proper behavior of the "Project" tool?

Regards,
Jan

Re: The world from space projection

MelitaKennedy — Fri, 01 Jul 2011 19:03:54 GMT

Hi Jan,

That's correct. When the software 'clips' features to a particular coordinate system, and saves them, it's permanent. We don't maintain the original feature and its clipped version in any permanent way.

I hadn't even thought about that reason!
Melita