The meaning of the PDOP, kph in the ArcPad,

[JamalNUMAN]

The meaning of the PDOP, kph in the ArcPad,

I couldn???t figure out how to read the information provided in the screenshots below

[ATTACH=CONFIG]30436[/ATTACH], [ATTACH=CONFIG]30437[/ATTACH]

Thank you

Best

Jamal

[Anonymous User · Accepted solution]

Original User: HannahFerrier

Hello,

The GPS Status Bar contains a lot of useful information.

The values you have indicated in your question are the altitude (m) and speed (kmph) of your GPS position.

[ATTACH=CONFIG]30438[/ATTACH]

The GPS Status Bar also indicates the number of satellites that are being used as well as the number of satellites in view with the GPS skyplot.

[ATTACH=CONFIG]30439[/ATTACH]

You can also see the signal strength of the satellites and the PDOP value. PDOP stands for Positional Dilution of Precision and is a value between 0-99 to indicate positional accuracy (the lower the number, the more accurate the position). Mapping grade projects usually require a PDOP of 6.0 or less, with survey grade projects requiring a PDOP of 4.0 or less.

[ATTACH=CONFIG]30440[/ATTACH]

See here for more information on GPS dilution of precision, including how PDOP is calculated.

Hope this helps,

Hannah 🙂

[JamalNUMAN]

Hello,

The GPS Status Bar contains a lot of useful information.

The values you have indicated in your question are the altitude (m) and speed (kmph) of your GPS position.

[ATTACH=CONFIG]30438[/ATTACH]

The GPS Status Bar also indicates the number of satellites that are being used as well as the number of satellites in view with the GPS skyplot.

[ATTACH=CONFIG]30439[/ATTACH]

You can also see the signal strength of the satellites and the PDOP value. PDOP stands for Positional Dilution of Precision and is a value between 0-99 to indicate positional accuracy (the lower the number, the more accurate the position). Mapping grade projects usually require a PDOP of 6.0 or less, with survey grade projects requiring a PDOP of 4.0 or less.

[ATTACH=CONFIG]30440[/ATTACH]

See here for more information on GPS dilution of precision, including how PDOP is calculated.

Hope this helps,

Hannah 🙂

Many thanks Hannah for the help. This is very useful.

Our GPS machine (Leica CS25) is supposed to provide an accuracy of +/- 1 cm when it works with RTK. Then how to interpret the values of PDOP in cm?

In other works, if the value of PDOP is 4 when what is its equivalent value in cm?