|
|
| GeoCommunity Mailing List |
| |
| Mailing List Archives |
| Subject: | Re: GISList: projection, datum |
| Date: |
06/10/2002 07:58:39 AM |
| From: |
Nigel James |
|
|
Hi Jay
Have a look at the USGS Map projections page at:
http://mac.usgs.gov/mac/isb/pubs/MapProjections/projections.html
best wishes
Nigel
On Sat, 25 May 2002 01:11:19 -0700 (PDT) jayachandran mani
<jayachandran_m@yahoo.com> wrote:
> Hi listers,
> I have few doubts
> about projections / datum.
> 1. What is the difference between projection and
> DATUM.
> I understand that projection(representation of
> spherical surface in 2 dim plane) is for
> horizontal reference and datum for vertical reference.
> But I came thru some papers where it is mentioned that
> horizontal reference as NAD83 datum and vertical
> reference as Mean sea level.
> Can you please explain me in detail. Any reference to
> internet sites which may explain more also be helpful.
>
> 2. What will be the difference in horizontal
> co-ordinates as the height changes.
>
>
> Regards
> Jay
__________________________________
Nigel N James
Map Room
Bodleian Library
Broad St
Oxford
OX1 3BG
UK
tel : +44 1865 277013
fax : +44 1865 277139
Visit the award-winning Map Room Home Page at: http://www.bodley.ox.ac.uk/guides/maps/
To unsubscribe, write to gislist-unsubscribe@geocomm.com
________________________________________________________________________
Setup a GeoCommunity Account and have access to FAST DataDownloads
and Premium Career Posting at a discounted rate!
https://www.geocomm.com/cgi-bin/accounts/login
On-line Archives available at
http://spatialnews.geocomm.com/community/lists/
|
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
