Re: GPS for use in Sierra Leone refugee camps

From: Dave Patton (none_at_none.com)
Date: 06/12/04 

Date: Sat, 12 Jun 2004 01:17:37 GMT

"Phil Bonner" <kh015b7338@blueyonder.co.uk> wrote in
news:wqqyc.83374$wd7.22120@front-1.news.blueyonder.co.uk:

> Hi, I need advice on which GPS device to purchase to map structures in
> camps in Sierra Leone. I need something durable, that has a large
> memory (will need to measure over 3000 points)

Could you explain in more detail exactly what you will be doing.
It's unclear what you mean by "map structures", and that may
affect the advice you are given.

> It may be cloudy as I will be there during the rainy season.

The clouds make no difference, and neither will the rain, but
wet vegetation may be a factor. Take a look at the "GPS reception
in trees" and "Buying a GPS receiver" pages on my website.

> So it is important that I find a device that either has a
> large memory or capable of adding memory so I may upload the data when
> I return home to analyze it.

Most consumer GPS receivers don't have capacity for 3000 waypoints,
but many Garmin models have 1000 waypoint capacity. One approach
may be to purchase multiple receivers, which also has the advantage
of having a backup if one of them fails or is lost/damaged. 

-- 
Dave Patton
Canadian Coordinator, Degree Confluence Project
http://www.confluence.org/
My website: http://members.shaw.ca/davepatton/

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