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Anyone interested in a very slightly used Etrex Legend. I got one a week and a half ago and find that I would be better served by something different. I've used it for biking once, two attempts @ geocaching, and a couple of times just playing around with it. Still looks brand new, everything works fine, all original equipment, manuals, box included. I'd like to get $200 for it.

Does anyone know....if the Magellan GPS 320 will do distance resolution down to the foot level? As in '200 feet from waypoint'. I am in the process of recommending a GPS to a new geocaching addict and I initially recommended the Magellan GPS 315 which is what I have but remembered that the one feature I would like to have on mine is resolution down to the foot. If the Magellan GPS 320 doesn't do this, does anyone know if any of the Magellan's have this capability. Thanks in advance!

Has there ever been a hotter thread in the history of this website - I doubt it! This is awesome! I bought a DeLorme gadget - I can't even remember the name of it now (it's a bad memory) -because I have a Palm 3c and thought it would be cool to use it as a GPS. Hated it. Cords going everywhere, guzzled batteries four at a time, no car adapter, maps were EXCRUCIATINGLY slow, took forever to acquire sats...you get the picture. I had it for a weekend and couldn't get it back to the store fast enough. Was out looking for a way to spend the $200 my dad had given me as a graduation gift - nearly bought a new cell phone (close call) I was talking to a guy at work about my experience with my GPS, he asked me if I'd ever done any "GeoCaching" - "Geo-What?" I said. He told me what little he knew, (he'd never been either, a friend of his in Wisconsin is a 'cacher) and I went back to the store that night and got my Magellan MAP330. Called my brother that night and told him about it, and the next day we found our first cache. That was April 26th. I have since found 26 caches, placed two, rescued one, and I have six more in the back of my Subaru begging for a home.

Is Geocaching becoming popular enough for domain name speculators? Has anyone here registered www.geocaching.co.za (South Africa)? The details from co.za's whois are: 0a. Last Update: Sat Feb 3 07:39:28 SAST 2001 0b. Sender: hostmaster@key.co.za 0c. Posted: Sat, 03 Feb 2001 07:39:12 +0200 0d. Subject: Domain registration [geocaching.co.za] 0e. Paper: 03-Feb-2001 0f. Payment: 04-Apr-2001 13:25:41 0g. Hist Cnt: 1 0h. Inv Number: 139283 0i. Contract: NEW 0j. Coza Version: $Revision: 1.39 $ $Date: 2001/01/05 13:10:59 $ 1a. Domain: geocaching.co.za 1b. Action: N 2a. Domain Owner: Andre Bruton 2b. Owner Postal: PO Box 4203, Randburg, 2125, South Africa 2c. Owner StAddr: 44 Goldman Street, Florida, 1709, South Africa 2d. Payment: 200 2e. Ac/Inv/Chqe: I 2f. Bill/Acct: Key Web Hosting 2g. Mail Bill to: admin@key.co.za 2h. NoDelayWord: **set** 2i. Invoice Addr: P O Box 4203, Randburg, 2125, South Africa 2j. Owner Phone: +27-11-475-6137 2k. Owner Fax: +27-11-475-3279 2l. Owner E-Mail: andre@bruton.co.za 3a. Opp Date: 2001/02/03 07:39:16 3b. CNAME Base: 3c. CNAME sub1: 3d. CNAME sub2: 4a. Adm Contact: Bruton, Andre 4b. Adm Title: Mr 4c. Adm Company: Key Web Hosting 4d. Adm Postal: P O Box 4203, Randburg, 2125, South Africa 4e. Adm Phone: +27 11 475-6137 4f. Adm Fax: +27 11 475-3279 4g. Adm E-Mail: andre@key.co.za 4h. Adm Nic: AB5331 5a. Tec Contact: Lockhart, Peter 5b. Tec Title: Mr 5c. Tec Company: Key Web Hosting 5d. Tec Postal: P O Box 4203, Randburg, 2125, South Africa 5e. Tec Phone: +27 11 475-6137 5f. Tec Fax: +27 11 475-3279 5g. Tec E-Mail: peterl@key.co.za 5h. Tec Nic: PL5082 6a. Prim NS FQDN: ns1.key.co.za 6b. Prim NS IP: 196.2.147.10 6e. Sec NS1 FQDN: ns2.key.co.za 6f. Sec NS1 IP: 196.2.147.5 ------------------ Peter Scholtz www.biometrics.co.za

quote:Originally posted by Quinnow:Ok...with that said and done I am sure that most people don't place caches in areas that reach 200 degree's, and if they do, there wont be anyone finding them anyways ... How about 122 degrees. That's the record high here in Phoenix. That's in the shade. If a cache box was dark colored and exposed to direct sun, the inside could easily reach 200 degrees. The inside of cars supposedly get that hot if the windows are closed and it's a dark color inside and out. Where you live you have to worry about knee deep snow which melts and can get inside a cache. We have the summer heat to melt the whole camera. Bob

quote:Originally posted by Quinnow:Ok...with that said and done I am sure that most people don't place caches in areas that reach 200 degree's, and if they do, there wont be anyone finding them anyways ... How about 122 degrees. That's the record high here in Phoenix. That's in the shade. If a cache box was dark colored and exposed to direct sun, the inside could easily reach 200 degrees. The inside of cars supposedly get that hot if the windows are closed and it's a dark color inside and out. Where you live you have to worry about knee deep snow which melts and can get inside a cache. We have the summer heat to melt the whole camera. Bob

Ok...with that said and done I am sure that most people don't place caches in areas that reach 200 degree's, and if they do, there wont be anyone finding them anyways I have placed cameras in my caches and left one out in weather that reached -3 degree's and was buried in over a foot of snow for about 2 months. I then went after the camera when it was an average of 70 degree's outside and the day I took it the temp was 83 degree's. the pictures came out like new and look great! to see them go here http://www.navicache.com/photos.html these are the pictures of my "ghosts domain" cache located in rochester, ny. the camera was a single use kodak non flash 27 exposure unit. By the way, I live in camera and film home town usa to kodak. I have many friends that work at kodak as well as a couple that make the film in the cameras, they insist that for what I use it for that it will more than perform when I get it back and develope it. oh! and for the last poster, I hope I didnt come across snide at the beginning of my post. As a matter of fact it's pretty cool that you got all that kodak information, it does come in pretty handy and I am making note of it as well for future use! thanks! ------------------ Quinn Stone Rochester, NY.14616 www.Navicache.com

Ok...with that said and done I am sure that most people don't place caches in areas that reach 200 degree's, and if they do, there wont be anyone finding them anyways I have placed cameras in my caches and left one out in weather that reached -3 degree's and was buried in over a foot of snow for about 2 months. I then went after the camera when it was an average of 70 degree's outside and the day I took it the temp was 83 degree's. the pictures came out like new and look great! to see them go here http://www.navicache.com/photos.html these are the pictures of my "ghosts domain" cache located in rochester, ny. the camera was a single use kodak non flash 27 exposure unit. By the way, I live in camera and film home town usa to kodak. I have many friends that work at kodak as well as a couple that make the film in the cameras, they insist that for what I use it for that it will more than perform when I get it back and develope it. oh! and for the last poster, I hope I didnt come across snide at the beginning of my post. As a matter of fact it's pretty cool that you got all that kodak information, it does come in pretty handy and I am making note of it as well for future use! thanks! ------------------ Quinn Stone Rochester, NY.14616 www.Navicache.com

Here's a question/answer from the Kodak web site regarding their cameras and extreme temps. Q: I've heard it's a good idea to keep a one-time-use camera in the glove compartment of my car in case of emergencies. Won't the extreme temperatures hurt it? A: The interior of a vehicle can be a very hostile environment for both photographic film and for cameras. Frigid conditions alone will not necessarily cause harm to film. Some of the difficulties that might be encountered when photographing with a one-time use camera which has been kept in a car under sub-zero temperatures include: brittle film tearing, film advance mechanism failing, shutter sticking or failing, and flash performing poorly because of weak energy delivery from frozen batteries. In the summer, temperatures inside a car can easily reach 200° F or more. At these high temperatures there is the strong potential for physical damage (such as film sticking to itself) as well as loss of picture quality (low contrast, color shift, and poor shadow detail).

Congrats! I think that you will like the Vista. The screen is small, but it is only a problem if you are trying to look at details while driving or the like. It has great clarity and legibility when you are holding it, and even when driving you can make out the roads fairly easily. My biggest gripe with it is that is doesn't support an external antenna. Did you order the Garmin MapSource Topo CD for topo maps? I also recommend the Metroguide CDs. It's nice to be 200 miles from home in an unfamiliar area and be able to locate the nearest Italian restaurant! [This message has been edited by Moun10Bike (edited 09 May 2001).]

Congrats! I think that you will like the Vista. The screen is small, but it is only a problem if you are trying to look at details while driving or the like. It has great clarity and legibility when you are holding it, and even when driving you can make out the roads fairly easily. My biggest gripe with it is that is doesn't support an external antenna. Did you order the Garmin MapSource Topo CD for topo maps? I also recommend the Metroguide CDs. It's nice to be 200 miles from home in an unfamiliar area and be able to locate the nearest Italian restaurant! [This message has been edited by Moun10Bike (edited 09 May 2001).]

I'm confussed about a couple of things. Now, I understand that there are different formats for locations (UTM, WSG, etc.) so maybe I'm just confussing them. This is what I've been able to figure out on my own, someone correct me if I'm wrong. If you visualize the globe as flat, then Greenwich is the orgin, meaning its at x=0 and y=0, so anything to the left of it on the horizontal axis is negative (W Latitudes), and anything bellow it on the vertical axis (S Longitudes) is negative and vice versa...pretty obvious. My question is, what are the ranges in degrees of lon. and lat. I'm assuming that they range from W or E 0 to 180 degrees and N or S 0 to 90 degrees, is that correct? My confussion comes when I see something like this -2.393.91. The way I see it, its E002.393.... its pretty obvious that you can't have a 200 degree eastern latitude because its greater than 180 degrees. But, my problem is that I don't know if 91 seconds as in ...091 or if it is 910 as in ...910, because it seems that GPS leave out zeros in their readings. Can someone clear this up for me? Thanks

"Inherent" works for me. And, yes, if you aren?t using GPS, you aren?t Geocaching. (JIntorcio's Law?) This is a concept that the cache owner has to keep in mind when deciding where to place the cache. If the cache can be found by map and compass alone, it isn't a Geocache.(Hawke's Corollary to JIntorcio's Law?) The cache should be placed far enough away from any landmarks found on a USGS topo map that the seeker will have to break out his/her GPS. For example, if clicking on the link to TopoZone shows that a cache is at the base of a 200' radio tower atop the highest hill in the county, you might as well leave your GPS at home. It might still be worth the trip because of a great view, but since it can easily be found without the GPS, it's not really Geocaching. In this case make the great view the first stage of a multistage cache and then you've got something that's becomes more of a navigational challenge.

"It is as if they have no idea what the SPORT is all about. They came 200 miles with no items period. They had to tell everyone the size of the rock and the extra rock. And boo hoo they had to guess at the road. Then they think all of us are as inept at reading a GPS as they are" (Now those comments are a real gem of maturity and sportmanship.) Aside from that: Thanks for the lead on this discussion area. It was new to us. Also, thanks for at least SOME useful feedback on the posted comments. We are fairly new at geocaching so we'll be alert to your concerns the next time (such as our oblique comment about the rocks in particular). It might be of interest to you that our posting had previously been sent as a Word document to the cache owner. The document was attached to the following email note, in part: > 4/30/01 > > Your cache was one of the most interesting we have > visited. Thanks for setting it up. Sorry about the two "visit logs" on > your site. My son was doing it on his laptop and accidently hit "send" > before done. I see he also entered "2000 miles" instead of "200 miles". So it > was about 400 miles round trip. If you wish, you are welcome to delete > those entries and we can add a new, consolidated entry that is cleaned up a bit (attached). The cache owner responded to our email, giving the green light to add the replacement document: If you login to geocaching.com and then go to the Chinatown site you can delete and reenter your log. I think that this is a new feature that Jeremy has recently added. I could delete them myself but I prefer to leave your entries until you decide to remove them. Thank you for visiting Chinatown. I will be looking forward to your cache. Quest Master. The cache owner also responded that modifications were made, based on our suggestions: Hi, thank you for your input. I am aware of the problem that Aukerman road is not marked. There was a sign once but something must have happened to it. I did not think to look for it when I placed the cache. I have edited the site to include this info. The Delorme Atlas and MapQuest refer to this road as T337 so I have included that info also to make it a little bit easier. Oh yeah, and as to the "no items period", the two dollars we left were probably more useful and more valuable than the combined contents of the cache (Opps, is that a "spoiler" too?). I think we are pretty much in the camp of "Scout's" April 30 posting: If the hider doesn't like it, he can delete the log entry. If future hunters don't like their hunt spoiled by extra information, they can exercise self restraint and don't read the logs until after the hunt.

Here is a recent post to a Cache that reinforces my POINT : : It was very hard to find the actual cache, although we had no problem locating the Chinese stone marker and dam. We drove 200 miles from Manassas, VA (one way) to find this one, but forgot to bring an exchange item so we left two one-dollar bills. We took nothing out. It was an interesting site, and fun to visit. We took photos and will try to get the text translated. Hopefully they will turn out OK when developed. The lighting wasn't real good and we only had a use once camera. A Chinese American coworker in my office may be able to translate if the photos are legible, and it is a dialect she understands. Your cache was really hard to locate, along the side of the large rock and with another rock on top. It clearly was not out in the open, but we left it exactly where it was. Our gps was having trouble there in the woods. And, Aukerman Road is not marked - no visible sign or number, unlike Sky View Road. We went up to Sky View then turned around and back to what we thought was Aukerman. It turned out to be a good guess. In your cache was a Forbes State Forest trail brochure that had Aukerman Road. That is the only place it appears on any maps that we saw. It is not even on the overall Forbes State Forest map. You might want to make that a bit easier, perhaps with coordinates at the entry for Aukerman Road (encrypted hint?). I can't imagine that a lot of people currently would be able to locate that access road. From the entry point, the subsequent pullout coordinates don't quite help. But the challenge was good! Thanks again for the interesting site and enjoyable hike. Watch for new caches in Somerset county from the GARMEN (& Women) Group in the coming months. It is as if they have no idea what the SPORT is all about. They came 200 miles with no items period. They had to tell everyone the size of the rock and the extra rock. And boo hoo they had to guess at the road. Then they think all of us are as inept at reading a GPS as they are [This message has been edited by Marshall (edited 30 April 2001).] [This message has been edited by Marshall (edited 30 April 2001).]

Mike, I hate to tell you but john-daly.com is as predictable a "deconstruction" as any other. Invariably, these disbelievers use biased opinions and bad examples. Here's a few from his page: "Satellite data shows a cooling trend". I don't know how many times it has to be repeated, but that is using the RAW DATA. This data is uncorrected for orbit decay. Once it is corrected, this "0.03 degree cooling trend" turns into a warming trend. I love his graphs with the "5-year moving average". Think about that for a sec. Why is that invalid? Natural cycles are on scales of thousands - billions of years. ONE SINGLE YEAR will skew even a 100-year average!!! Regressional analysis of a 5 year curve is as meaningful as saying "it was hot today - global warming is true!" Incidentally, all his little anecdotes about individual snowstorms and colder temperatures around the world are just as useful. We have been recording weather for maybe 200 years. Weather has been happening for hundreds of millions of years. The statistical probability that we have seen the extreme ends of what weather is capable of in any given location is next to zero. His article "Opinion - Models or Mimics?" directly contradicts his conclusion that CO2 rates are linked to temperature and not vice versa. (Incidentally this is true - carbonate system weathering rates increase with temperature, leading to more CO2). You'll notice that his rant does not actually address the problem - we are adding billions of tons of CO2 to the atmosphere. His article addresses nothing! If we were increasing the temperature, then it might be relevant, but that isn't the problem. No one is arguing natural cycles and the CO2 lag - that is common knowledge. But what of the reverse??? Also, throughout the site he rags on the media for only presenting the "warming side" of the debate. Yet his site ONLY puts links to the other side of the debate!!! This site is un-professional, un-scientific and completely biased! Statements like : "I have closely followed the carbon dioxide warming arguments. From what I have learned of how the atmosphere ticks over 40 years of study, I have been unable to convince myself that a doubling of human-induced greenhouse gases can lead to anything but quite small and insignificant amounts of global warming." Are meaningless!!! Who is this guy? Why should we believe him?? What evidence is he studying, what is his background, political or otherwise? Okay, this is getting long so I'll shutup. The point is, people like John Daly use bias and un-scientific methods (not to mention poor data) to prove their points. Increase your depth of study before making a conclusion. I have studied climate for 5 years now - here are some better links: http://www.ec.gc.ca/climate/index.html Tons of info on canadian climate and warming effects, including data so you can do your own analysis. http://climatesolutions.org Good facts but obviously biased. Take it with a grain of salt. http://tigerherbs.com/eclectica/earthcrash/index.html This site, opposite of Daly's, keeps track of news articles that support global warming. http://www.ipcc.ch/ The IPCC homepage. Check out the data & reports yourself before taking someone else's opinion of them. It is real! Okay I'm done. [This message has been edited by Goat Commander (edited 22 April 2001).]

Ok folks, tell me what you suggest. In my cache searches locally I don't need to use topo maps and I only use the mapblast to get me near the cache site. I always use my compass between 200 and 100 feet and then use the etrex to estimate how close I am to the cache site. Maybe I should just experiment with magnetic north and true north and see which routinely is more accurate. Maybe there is no real difference for the narrow distance I am discussing. Bill

Your GPS is giving the correct position. The problem is that Geocaching.com uses the WGS84 datum (the current standard), while Topozone.com uses USGS maps that use the older NAD27 datum. This can lead to a positional difference of up to around 200 meters in some parts of the US. In order to plot the correct point on Topozone, you will have to convert the cache coordinates to the NAD27 datum and then tell Topozone (manually) to plot them. For more info on datums, see http://joe.mehaffey.com/maps.txt and http://www.alltopo.com/gps_accuracy.htm .

e already intense use this small system supports. We have approximately 3.5 million visitors per year, which is more than visit Rocky Mountain National Park, and we have only one-eighth the acreage. We appreciation our local geocachers? respect and concern for the environment, as expressed through dialog on the web site, and would like to add our own to the conversation. Our primary concern is the increased off trail use that this activity generates. Assuming the goal of this sport is to use a GPS unit on a scavenger hunt, it seems unlikely that staying on trail would be the normal or desired mode of travel for geocachers. The park has 140 miles of official trails, and we estimate over 200 miles of social trails. This high volume of social trails indicates that visitors are penetrating core areas specifically intended to remain as undisrupted habitat. The topography, slope, soil types and vegetation on Open Space and Mountain Parks properties cannot sustain off-trail use. Off trail activities are causing extensive soil erosion. Trampled vegetation at trail edges tends to be replaced by weeds rather than native plants. We are concerned about damage to native plants such as Ute ladies?-tresses orchids, a federally listed species, as well as other sensitive plant species and communities. Fragmentation of wildlife habitat for animals, like the endangered Preble?s meadow jumping mice, gray fox and goshawk is likely. Disruptive intrusions into the breeding territory of the forest and grassland nesting birds, including peregrine falcons and golden eagles, is also a potential problem. Preserving core areas of unfragmented habitats is a major management goal. Habitat fragmentation affects animals negatively by eliminating vast tracts of uninterrupted space needed to sustain foraging, nesting, breeding and territory needs. Unofficial paths bisecting these habitats cause animals to spend unnecessary time defending their nests or territory from humans. This detracts from time normally spent feeding and caring for their offspring, which can result in the death of their young. Off trail travel results in a corridor of impact. A single person quietly hiking has much less impact than a pair or group, and significantly less impact than when a dog is present. The weaving nature of a dog?s normal travel dramatically broadens the corridor of impact, made worse if the dog is actively scouting for animals, following scent trails, digging and/or barking. Proposing an alternative use for this navigation/orienteering technique that directs the general public to local special natural history points, such as rare plant species or communities, elicits greater concerns. In an effort to balance the research and protection needs of these communities we use staff and volunteers to monitor them, but within a controlled framework. Explorations by larger numbers of people to these areas would probably prove very detrimental to their health. Management policies aim at protection of the lands while providing for appropriate recreational activities. Consequently, our policy includes discouraging off trail use and any activities that involve taking anything from the park or leaving property in the park. Our wildlife closures specifically prohibit human incursions into protected areas. Activities that damage property or can be perceived of as littering or construction of structures are not allowed. Our preference would be to see the geocaching activities happening on lands that are less vulnerable than the Open Space and Mountain Parks properties. The basic premises of the "Leave No Trace Policy" are critical to the protection of these lands: stay on trails, leave it as you found it, carry out your trash, manage your dog, pick up after your pet, and share the trail with other users. (For more specifics on "Leave No Trace", visit the web site www.ci.boulder.co.us/openspace/lnt/lntonos.htm.) Our regulations can be found at www.ci.boulder.co.us/openspace/rules.htm. Thank you for taking the time to read about our concerns. Feel free to visit our web site at www.ci.boulder.co.us/openspace or contact us at sutherlandd@ci.boulder.co.us or by phone at (303) 441-3440.

I have been swapping e-mails back and forth with Kim from http://www.advancedgps.com/ and she says that 100 vista's are going out tomorrow, and another 200 are expected to be sent out thursaday or friday (this is shipping to customer not shipping to advanced from Garmin.) I have checked many sites for GPS units and pricing and she seems to have one of the best with the offer of no shipping costs. She has also been very helpful and at the time I was e-mailing with her she did not know of "Geocaching" until I mentioned it, she now intends on taking the family out for a go at the sport. If any of you guys are new to this sport and are thinking about buying a GPS unit, be sure to check that site out. I know of many people from this board that have bought theres from here as well as I have too! ------------------ Quinn Stone Rochester, NY.14616 www.Navicache.com [This message has been edited by Quinnow (edited 04-03-2001).]

The ones I was looking at says they can be recharged about 500 times, but what I am wondering is what the heck is NiMH? is that nick cads? also can they be used in the unit I mentioned and at what battery setting? I would like to take a look at the ones you are using, is there a site that shows those? quote:Originally posted by wjoos123:I'm using ACCUCELL's you can get them in all sizes, they have (for AA batteries) 1800mAh !!! and a low discharge current, and better performance in cold conditions. Accucells combine NiMH and Alkaline batteries. They are rechargeable (about 200 time)!!! ------------------ Quinn Stone Rochester, NY.14616 www.Navicache.com

I'm using ACCUCELL's you can get them in all sizes, they have (for AA batteries) 1800mAh !!! and a low discharge current, and better performance in cold conditions. Accucells combine NiMH and Alkaline batteries. They are rechargeable (about 200 time)!!!

Wow those prices are way high. I use quality .50cal ammo cans that i get for 3.50 each. I buy very nice toys for kids like yo-yo's and crayons for 1.00 each at the "dollar store", you can also get a great logbook there for the same price. The camera is about 8-10 like you said, but all in all you can make an excellant cache for around 20.00 total. I still have noticed that tons of people are going out and bragging that they found 5 caches in a single day, some have over 30 caches under their belts, yet have hidden less than 3 if any at all. I put hours into thinking about where I will hide one, as well as the money put into making it and the cost of gas to take it out and place it. So for me to do all this for someone else to enjoy and give nothing back in return is kind of upsetting to me. So for those of you that have run out into the field and cache hunted all day to return and brag about your finds, please remember that if it wasn't for us making them your GPS would still be on that shelf collecting dust. If you're not going to place any then don't go look for any either. I understand that there are those few instances where maybe a geocacher is not able to get out and place one, like maybe health reasons or age, but for those of you that are racking over 5 finds and haven't placed one yet you need to stop where you are and start helping the cause of placing one in a nice location...my two cents! quote:Originally posted by daviskw:Hmmm I guess I could be considered a slacker by the standards here. I have 31 finds and have placed 5. But there is something you people are forgetting, not everyone here is rich. I'm not poor mouthing but on each cache I spent: $6.00 container $8.50 camera $25 of gifts $3.00 logbook $2.00 for 2 pens and 3 pencils and sharpener. 1.00 for baggies and such. Add a few bucks for box decorations and gas to get there and it is around $50 per cache. That is $200 bucks in a couple of months that I found the 31 caches. That's about all I can afford. I'm not complaining, I like having nice cashes for people to find and enjoy and I'm not worried about counting who does what. Butch ------------------ Quinn Stone Rochester, NY.14616 www.Navicache.com [This message has been edited by Quinnow (edited 03-29-2001).]

Why doesn't this site use UTM coordinates as a standard? UTM coordinates are much more intuitive and is the datum used on USGS maps. Why use degrees, minutes, and seconds when coordinates can be logged in meters? If people are not familiar with the UTM system it would be well worth the short time to learn it. For exanple: If I am standing at 15S 0369238/3923896 and my objective is 15S 0369238/3923696 then I know that my objective is 200 meters south of my current position just by subtracting the coodinates.

I have one of the TOPO! sets for SFBay, Napa and BigSur (2 disks total). It was $50. There are about 8 sections of the state available at that rate, or the whole state for $200. I just saw on the discussion list the following web site which apparently has the entire state at $150. www.4x4books.com I really like the series...haven't seen Delorme, but have read some dissatifaction with it.