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| Re: Conversions among datums and geographic coordinates [message #17869 is a reply to message #17715] |
Fri, 12 November 1999 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Joe Means (means@fsl.orst.edu) writes:
> Thanks to all who responded to my request for info. I have been using Proj4
> program suite, specifically routine nad2nad, for several years and it works
> OK once I get around its querks. For example, This does not work:
> nad2nad -i spcs=83,4602,feet -o 83,utm=10 -r conus <_ewns.dta
>> _new_ewns.dta
> but this does:
> nad2nad -i spcs=83,4602,feet -o 83,utm=10 <_ewns.dta >_new_ewns.dta
I can see why people like IDL.
I'm even beginning to appreciate how a statement like:
Print, Where( A NE A)
has the power to keep the boss from snooping around too
often. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: Conversions among datums and geographic coordinates [message #17870 is a reply to message #17715] |
Fri, 12 November 1999 00:00 |
Joe Means
Messages: 44
Registered: November 1996
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Member |
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Thanks to all who responded to my request for info. I have been using Proj4
program suite, specifically routine nad2nad, for several years and it works
OK once I get around its querks. For example, This does not work:
nad2nad -i spcs=83,4602,feet -o 83,utm=10 -r conus <_ewns.dta
> _new_ewns.dta
but this does:
nad2nad -i spcs=83,4602,feet -o 83,utm=10 <_ewns.dta >_new_ewns.dta
I like corpscon but have not been able to find callable modules [probably
nadcon and vertcon?] for it. I'd appreciate help here.
Joe Means
Med Bennett wrote:
> You can find an executable that does all this at
> http://crunch.tec.army.mil/software/corpscon/corpscon.html
> I don't know if you can get source code out of them however.
>
> Joe Means wrote:
>
>> I would like to fine a routine or group of routines to convert among
>> datums [NAD27, NAD83], and projection systems [e.g., state plane, UTM]
>> and coordinates systems [lat-long, cartesian] that can be called from
>> within IDL I have been looking for this for a while with limited
>> success. Any one have ideas?
>> Joe Means
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