3d relief with portable and bluetooth gps

[barrubba]

without spending cifrone in equipment, there is a way to detect in 3d the cordinate gps of a plot of 500mq for example, with variable heights (is country zone with descent to a pond, walking it with in hand portable, software that tracks and a common gps bluetooth?
Thank you.

 

[studio.avarino]

I think you need a software that reads gps data (usually strings in nmea format, I think).
I downloaded mygps a long time ago, but I never tried it.
I'd like to know if you can.

 

[studio.avarino]

I forgot an important observation: precision, especially for altimetry, is very low if you use only one receiver and so you can't do rtk system corrections.
If you want to use something prepackaged you can see the site of s.c.s. (survey cad) is a company of Verona povegliano.

 

[AntonioV]

If I can say mine, the business is not as simple as it looks.

the area to be detected is 500 square meters. I mean, a little bigger than a basketball court.

Now, since the accuracy of a "normal" gps is in the order of 10 meters, it will be necessary una of the two following conditions:

1] Internet connection to download in real time the differential corrections from the nearest rtk server

2] receiver compatible with the egnos system, without need of internet.

In the best case, you will get a accuracy of about 2-3 meters, unless you rent a professional submetric gps.

as to the rescue in situ of the track 3d of the path, I can not say as I prefer post-processarmela calmly in the office, after obviously downloading data from the receiver gps to the fixed pc.

:

 

[Tequila]

I confirm what is said by Cadlandian, the normal gps have a good altimeter. Perhaps you can see those for climbers who should be more precise but I always think in the order of the meter and not centimeters.
what I had on the ultralegger had the precision of the meter

 

[Tristan]

there will be a because if a double frequency gps costs thousands of euros while an antenna gps usb costs to say so much 50 euros...if you have to make a precision relief avoids economic solutions; If you need a span relief then you can also do business.

 

[barrubba]

This morning I was with the technician who was carrying out the relief of a small part of the lot that I care about.
I should reverse the full relief. comparing the gps data of the altitude given by my blackberry, I have to confess strangely coincided with the data of his topconn. Perhaps it was a coincidence, or the presence of many satellites, but this leaves me well hoped for the work I will do.
I installed on the black a software that tracks in real time the path made on foot (or in car) and saves it as gpx.
I tested it straight on the most irregular area of the ground, and later I'll see the result. I hope that's what I think.

I'll let you know.

 

[AntonioV]

strangely coincided with the data of his topconn

It is probable that it happened as both "sold" themselves satellites at the same time, and therefore the measures were affected by themselves errors.

to evaluate the accuracy of your blackberry, I recommend you measure the coordinates of a point fiduciale.