Cardinal Red

But the other one also has a test description.

I can clearly see the difference in estimated "Accuracy" with WAAS on (Garmin MAP 76S) .

This kind of Math only makes sense to a Public Entity.

AtoZ Posted on Mar 22 2005, 10:36 AM He gave us a 3 Decimal picture (at the Benchmark) in his Log

A topic you might find interesting - Suggestions to Garmin

EScout Posted on Mar 20 2005, 11:26 PM Normally I would agree with you, but as was also mentioned earlier: Cardinal Red Posted on Mar 20 2005, 08:41 PM Poindexter Posted on Mar 20 2005, 09:07 PM That is actually only about 18' different than the GC Coords. Certainly not hundreds of feet. In this particular case I would be more concerned about: vagabond Posted on Mar 20 2005, 09:05 PM

team jsstyles Posted on Mar 21 2005, 02:35 PM Out of those 3, ONLY the Magellan eXplorist 300 has a built in Electronic Compass. You can check out both company product lines at: Garmin GPS Products Magellan GPS Products

Click Here To Follow Earthcache Info

Poindexter Posted on Mar 20 2005, 08:24 PM I was a little concerned about the accuracy of the Benchmark Coordinates also. But when I read the logs, a previous finder had provided coordinates of N 33 Deg. 47.280 Min. and W 117 Deg. 51.150 Min. So I was satisfied with using the very close numbers on the GC Benchmark Page.

Big_Lebowski Posted on Mar 20 2005, 06:11 PM Congratulations on this find ! ! ! Your GPS is set to the Geocaching standard of Degrees, Minutes, and Decimal Minutes. The numbers in the "N" (North) row represent Latitude, and each .001 Minute equals about 6 Feet (anywhere on Earth). The numbers in the "W" (West) row represent Longitude, and each .001 Minute equals about 5 Feet (at that particular location). The Benchmark page gives N 33 Degrees 47.283 Minutes and W 117 Degrees 51.150 Minutes in the NAD83 Datum. I know that we told you to use the WGS84 Datum, but NAD83 is virtually identical. So no problem there. So: [295 - 283 = 12] ... [12 x 6 = 72 Feet] ... You are indicating 72 Feet too far North And: [158 - 150 = 8] ... [8 x 5 = 40 Feet] ... You are indicating 40 Feet too far West This is a total difference of about 82 Feet. I don't know how good a lock your GPSr had, but this is a lot better than a Football Field. I would certainly try a nearby Cache and see what happens. Edited to add that if anyone else wants to make sense of this thread, I looked at the picture of your GPSr at the Benchmark. It was indicating N 33 Degrees 47.295 Minutes and W 117 Degrees 51.158 Minutes.

blindleader Posted on Mar 20 2005, 12:50 PM OK Serious question here. No sarcasm. I have never owned a Magellan, but I would not rule it out. With my Garmin, I wonder why I have to collect Location data Vertical but the Electronic Compass must be Horizontal (solved that with an external Antenna). Magellan even seems to have a better implementation of the Electronic Compass. But this is the first time I have heard about "defeating" Auotaveraging on a Magellan. Is this a commonly known "workaround" amoung Maggie fans? Is it a simple or a high tech procedure?

blindleader Posted on Mar 19 2005, 06:49 PM All my research (many posts on this forum and google the web) indicate that not only does Magellan "support" averaging, it forces averaging on you with their "Auto Averaging" feature. At least while you are standing still. This is not the first post where blindleader has indicated an aversion to averaging. It's possible he is right, but wouldn't it be ironic if he was using a Magellan. I like the Garmin implementation of averaging. Select it if you want to experiment with it. Certainly the best advice to establish Cache coordinates is test them just like all subsequent searchers will. Program the candidate coordinate into your GPSr. Approach from several directions. See how close you get. Adjust as necessary. Try it on more than one day, and at different times of day. It looks like all the Garmin "MAP" 60 and 76 units offer Waypoint Averaging. If you ever need to know about any specific GPSr unit, download the Manual.

SilverMarc Posted on Mar 19 2005, 05:15 PM Read the many suggestions in this recent thread Edited URL to point to the Original Post instead of my reply in the thread.

gumbyandeddy Posted on Mar 19 2005, 11:43 AM Link to thread mentioned by gumbyandeddy

Big_Lebowski Posted on Mar 19 2005, 02:25 AM I have no doubt that someone close to your location would welcome the opportunity to help you with this in person. But, you have given us no clue that I can find, what your general location is. Don't disclose in "public" exactly where you are, but give us a hint. EDIT: Was this the "clue" I missed: Block of orange, Main place mall. etc etc etc If it is, it certainly went right over my head. Also there are Forums here by Country and by Region. Posting this in a vicinity specific Forum will give you the best chance to find the help you seek.

Big_Lebowski Posted on Mar 19 2005, 02:27 AM Wally World Web Site Enjoy the humor.

Big_Lebowski Posted on Mar 18 2005, 04:30 PM Just checked out Maptec online. I have very good coordinates on a Building about 2 Football fields long and 1 Football Field Wide. I used a Garmin Mapping unit set to WGS84 to obtain those coords. Checking my known coords against that Building on Maptec, I found the Longitude to be quite close. But, the Latitude seems to be off by about 75 to 100 Feet (The pointer on the Map is sitting too far North). So part of the problem could be the Maptec information itself.

Big_Lebowski Posted on Mar 18 2005, 03:50 PM Just curious, what is your point of reference that indicates this level of innacuracy? Often someone comes here and says " I was X number of feet too far away from the Cache". Or, "according to the Map I'm driving in the middle of the River". Being a little more specific might help someone to answer your question.

Spyder13 Posted on Mar 17 2005, 03:38 PM I had never used the site posted by junglehair. Have to remember it for future reference. Unless there is an option I missed, one thing that would make it a little more user friendly would be the ability to look up a city WITHOUT having to know the Province first. Of course you probably already know both cities are in the Noord-Holland Province. And the second city on your list is actually Blaricum, probably just a typo.

Different by how much? Of course I have to edit this to note that I was thinking Map, when you said Mapquest. Big difference. Let's try this yet again. Now that I really read what you said and LOOKED at it, here's the answer. The Cache Page is in Degrees, Minutes, and Decimal Minutes. Mapquest is in Degrees, and Decimal Degrees. Same location. Just looks different. Multiply the Decimal of the Mapquest number by 60, and see if it looks more familiar.

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