topic Re: Comparing GPS coordinates in Survey123 in ArcGIS Survey123 Questions

Comparing GPS coordinates in Survey123

newwollyka — Sat, 30 Oct 2021 19:21:23 GMT

Is there a way in Survey123 to compare the spatial distance in meters between 2 GPS coordinates (on fixed GPS coordinates and the other one is the actual location of the device/enumerator)?

If the distance is, say, more than 30m, show an error message "You are far away, please go to the designated location"?

Re: Comparing GPS coordinates in Survey123

DougBrowning — Mon, 01 Nov 2021 14:38:03 GMT

Here I send in the DesignLat/Long and compare to the current (which someone called easting/northing and it drives me nuts). Can compare any 2 with it.

round(acos(sin(${Northing} * pi() div 180)*sin(${DesignLat} * pi() div 180) + cos(${Northing} * pi() div 180)*cos(${DesignLat} * pi() div 180)*cos((${DesignLong} * pi() div 180)-(${Easting} * pi() div 180))) * 6371000,2)

meters

Re: Comparing GPS coordinates in Survey123

newwollyka — Mon, 01 Nov 2021 17:34:32 GMT

Thanks

Does it work if one of those GPS coordinates (DesignLat/Long) are taken from Collector app through a custom URL scheme using the &center or Survey123 will be lost here?

Re: Comparing GPS coordinates in Survey123

DougBrowning — Mon, 01 Nov 2021 19:25:37 GMT

I send these using a URL. Just send it into a field in the form then compare.

Re: Comparing GPS coordinates in Survey123

newwollyka — Mon, 01 Nov 2021 19:37:18 GMT

Doesn't the center (&center=43.567,-117.380) in the custom URL sets ALL the geopoint questions to those coordinates? In that case, should I sent those coordinates from the Collector app to a text field in Survey123 and then compare?

Re: Comparing GPS coordinates in Survey123

DougBrowning — Mon, 01 Nov 2021 19:43:06 GMT

Yes do not use center just send them as text into a field in the form. Then have a second set of lat/long using pulldata to get the form GPS lat/long. Then compare those 2 fields. Sorry that was not clear.

Re: Comparing GPS coordinates in Survey123

newwollyka — Mon, 01 Nov 2021 19:50:05 GMT

Thanks for the explanation. On a side note, can we collect the GPS automatically (hidden way) without showing or clicking on the GPS button or map in the form (using the field app)?

Re: Comparing GPS coordinates in Survey123

DougBrowning — Mon, 01 Nov 2021 19:59:37 GMT

I think you can hide the GPS question using the new body::esri:visible column.