I have not used a Leica GS20, how does it compare to the GeoXT? also,=20 =20 Malcolm L. McCallum Assistant Professor Department of Biological Sciences Texas A&M University Texarkana 2600 Robison Rd. Texarkana, TX 75501 O: 1-903-233-3134 H: 1-903-791-3843 Homepage: https://www.eagle.tamut.edu/faculty/mmccallum/index.html =20
________________________________ From: Ecological Society of America: grants, jobs, news on behalf of = Marlow G. Pellatt Sent: Mon 3/27/2006 11:26 PM To: ECOLOG-L@LISTSERV.UMD.EDU Subject: Re: GPS units and accuracy data There are several GPS units with as good or better precision than the = GeoXT. You will need to decide what Basic mapping grade handheld units include = the Leica GS20, Trimble Pathfinder series, and several other survey and = mapping level GPS units. The Trimble GeoXT is a good handheld unit with decent accuracy but is not the most accurate or precise GPS on the market. Geodetic and Survey grade GPS units are highly accurate but expensive. = I have used several Garmins, Trimbles, CMT, and Leicas. I have been happy with with Leica GS20 and Trimble GeoXT for collecting spatial data for = most ecological applications. Take a look at how the software will interface with your GIS and weather = you need to look at maps and air photos etc of you site in the field. Here are some websites that may help you. http://www.digitalgrove.net/GPS.htm http://www.gmat.unsw.edu.au/snap/gps/gps_survey/chap4/chap4.htm Cheers, Marlow On Mon, 27 Mar 2006 14:41:46 -0600 [EMAIL PROTECTED] wrote: > Forumites > > I wanted to find out more about GPS units, a topic many people have = asked > about on this listserv in the past. What I am trying to figure out is = the > accuracy between an item like the Trimble Geo-Explorer XT compared to > something more economically available like a Garmin 12 or Magellan > product? =20 > Are people happy using simple GPS units like the Garmin 12 to collect = data > especially if you want to conduct geospatial analyses and if so how do = you > deal with spatial accuracy and post processing data if it can be done. = =20 > Also, what is the spatial accuracy compared to sub-meter GPS units. I > would > assume that it couldn't but it might also be difficult to do. I know = the > Trimble GPS unit and Pathfinder Office makes this easier and you have > better > accuracy and precision, you even get a root mean square error with you > data > so that could be discussed. I appreciate any input and help from any > one and > look forward to hear what has to be said. You can reply to me and = then I > can summarize what was said to the listserv if need be. > > Thanks, > > Arvind > > > Master's Student > Department of Geography > Virginia Tech > http://www.geography.vt.edu/people/Grad%20Students/bhuta.htm > Marlow G. Pellatt, Ph.D. Coastal Ecologist Parks Canada, Western Canada Service Centre 300 - 300 West Georgia Street Vancouver, British Columbia V6B 6B4 Canada, and School of Resource and Environmental Management Simon Fraser University Burnaby, British Columbia V5A 1S6 Canada Phone: (604) 666-2556 Email: [EMAIL PROTECTED]
