Can I use my 910 for this ?

[Rolacoy]

I posted this in the "General" forum yesterday and have not heard from anyone. Maybe someone here can help me.

I have a TT 910. I also have a piece of property, it is 10 acres. I know where the South West and North West boundary markers are located. I know that the property runs 450' East from both markers. The plot plan has some numbers printed on it, S 89 Degrees 38' E on the North. It also has N 89 degrees 28' on the South.

When I go on Google Earth I can find a location that is within about 25' of the North West corner marker. Our area is not very high resolution. That location is 32 degrees 27'25.55" N and 94 degrees o4'29.77" W.

We plan to sell the property in the spring and once we find a buyer we will have to get a survey done. I would like to roughly find the property lines so that I can give prospective buyers a good idea where the property lines lay. The property is a pine thicket and most places you can only see 40' or 50'. I would like to take TT and find some locations along the property line, can I do this and if so how?

 

[GAW]

I posted this in the "General" forum yesterday and have not heard from anyone. Maybe someone here can help me.

I have a TT 910. I also have a piece of property, it is 10 acres. I know where the South West and North West boundary markers are located. I know that the property runs 450' East from both markers. The plot plan has some numbers printed on it, S 89 Degrees 38' E on the North. It also has N 89 degrees 28' on the South.

When I go on Google Earth I can find a location that is within about 25' of the North West corner marker. Our area is not very high resolution. That location is 32 degrees 27'25.55" N and 94 degrees o4'29.77" W.

We plan to sell the property in the spring and once we find a buyer we will have to get a survey done. I would like to roughly find the property lines so that I can give prospective buyers a good idea where the property lines lay. The property is a pine thicket and most places you can only see 40' or 50'. I would like to take TT and find some locations along the property line, can I do this and if so how?

There are some third party applications that could help - go to that section of the forum. The forum also as instructions on installing them on you device.

I have tripmster, and it has readings with latitude and longitude. There is also a off-road application that would have it, but I have not used it. Tripmaster will also give you altitude.

You might walk the site slowly (after you have downloaded and installed one of these applications) until its reading corresponds to your property corners. in order to get the property line, you would have to lay your site out on a grid and note some coordinates on the lines.

Note - you would really need your corners down to ". You might set up the grid first and ger readings for the corners you mentioned above, plot them, and then apply the 450' east to plot the others. Calculate their location, and take your 910 and go locate them. This should get you within 25 feet.

Good luck - out west here, thanks to the homestead act , everything is on a grid (for the most part).

 

[jimj]

You should be able to do it with the 910 by going to the page that enables you to change the way your position is describe ie: degrees,minutes,seconds. by tapping on the gps reception bars which will give you a page showing what looks like a cell phone that is X'd out ,tap on that figure and you will be on a page that will enable you to set the geo position to show,compass direction you are heading and speed in mph.It can be set even without satellite lock. Hope this helps.

 

[bobball]

The GPS receivers used for off-road, boating and trail display some kind of how-accurate-is-this-location number. On my Garmin eTrex Vista, the EPE (estimate of position error) gets as low as 5-6 yards if I'm also receiving a WAAS signal, and don't ask me what that is.

Take a look at this site for a sense of these numbers:

http://gpsinformation.net/main/errors.htm

I don't know if Tripmaster displays any such number, and from the website listed above, it appears that Garmin, Magellan and Lowrance each assign their own meaning to such numbers.

It all suggests to me that using the TomTom to estimate the corners of acreage is pushing the device beyond its limits. Such GPS devices exist outside of the military and commercial aviation, I believe, but they're expensive.

I track several Macinotosh newsgroups daily. The only non-Mac group I keep up with is sci.geo.satellite-nav. These questions come up frequently, and some of the best info comes from the guys named on the site I quoted: Wormley, Mehaffey and Yeazel.

 

[PolyPill]

My brother is a land surveyor and from what I know about how he does it your tomtom or any consumer GPS device will not be accurate enough. Even their GPS devices aren't accurate enough. There are geographical markers with a GPS receiver dispersed throughout the state (at least in Minnesota there are), the weather conditions of the day effect the position, so every day they go to a marker and calibrate their receivers to match the readings.

Now if you've got a large plot of land and just want an estimate you could probably get a pretty good idea, but don't go building anything based on that because you can be off by 300ft.