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Survey123 with Collector: set geotrace

Marc-AndreBedard

Hi !

is there a way to pass the location of a line in collector "Aurora" to Survey123 in the same way of passing the location to a geopoint in survey123 ?

Thanks to great thread https://community.esri.com/groups/survey123/blog/2016/07/30/understanding-survey123s-custom-url-scheme from https://community.esri.com/people/ichivite-esristaff and https://community.esri.com/people/JTedrick-esristaff

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Accepted answers

JamesTedrick

Hi Marc-Andre,

I had a bit of time to work this out - this should provide the line. There are some issues with more complex lines, as they can consist of multiple parts:

var geom = Geometry($feature);
var outparts = [];
var counter = 0;
for (var p in geom.paths) {
 var thispath = geom.paths
;
 for (var pt in thispath) {
   var ptstr = Concatenate(thispath[pt].y, " ", thispath[pt].x);
   outparts[counter]= ptstr;
   counter = counter + 1;
 } 
}

return Concatenate(outparts, ";");

All comments

JamesTedrick

Hi Marc-Andre,

What aspect of the line do you want to bring into Survey123? I would take a look at the Geometry functions in Arcade Function Reference | ArcGIS for Developers - you could include these as an attribute expression.

Marc-AndreBedard

Hi James,

thanks for your quick response.

I would like to "copy" the geometry from collector to the geotrace in Survey123.

I have a map containing roads and I want to start a survey on a specific segment.

So from collector, I pass via arguments certain fields that I want from Collector to Survey via the survey123s-custom-url-scheme. E.g.: Road name, owner,...

We currently have multiple maps and surveys that use custom url scheme with "point" entities. So the XY coordinates are pass to the survey in the geopoint.

So, I would like to do the same thing but with a line in collector to a geotrace in survey123.

Is it currently possible and supported ?

Regards,

JamesTedrick

Copying the full geometry is a little more complicated- to begin with geotrace support is in beta in Survey123. Survey123 will want the incoming coordinates to

y1 x1;y2 x2;y3 x3;...

So you would need an Arcade function to process the shape vertices into this format.

JamesTedrick

Hi Marc-Andre,

I had a bit of time to work this out - this should provide the line. There are some issues with more complex lines, as they can consist of multiple parts:

var geom = Geometry($feature);
var outparts = [];
var counter = 0;
for (var p in geom.paths) {
 var thispath = geom.paths
;
 for (var pt in thispath) {
   var ptstr = Concatenate(thispath[pt].y, " ", thispath[pt].x);
   outparts[counter]= ptstr;
   counter = counter + 1;
 } 
}

return Concatenate(outparts, ";");

ChrisRoberts2

Thanks James

What would be the syntax if we want to pass a polygon geometry from Collector to a Geoshape question in Survey123?

Cheers

Chris

JamesTedrick

Hi Chris,

The Arcade expressions very similar, mostly you need to substitute 'rings' for 'paths':

var geom = Geometry($feature);
var firstpart = geom.rings[0];
var outparts = [];
var counter = 0;
for (var pt in firstpart){
var ptstr = Concatenate(firstpart[pt].y, " ", firstpart[pt].x);
outparts[counter]= ptstr;
counter = counter + 1;
}

return Concatenate(outparts, ";")

I'm planning on publishing these in GitHub - Esri/arcade-expressions: ArcGIS Arcade expression templates for all supported profiles in the ArcGIS platform. in the near future.

ChrisRoberts2

Thanks James

I got that working, can I assume though that we would need to convert this into Lats and Longs in order to parse it through to a geoshape question?

I have built this link and although it opens up the appropriate survey and does contain the coordinates, is doesn't create the geoshape.

I have also tried substituting center for geoshape and the geoshape question name

arcgis-survey123://?itemID=6ffa91c679cd4ec99a6482e70dd3158e&center=-4368437.09908237%2015568468.47895944%3B-4368478.018118211%2015569744.148226732%3B-4368584.9584379345%2015569765.78726955%3B-4369031.402026243%2015569856.124205573%3B-4369455.085184722%2015569941.862870062%3B-4369426.875276136%2015568806.965103844%3B-4368476.830919922%2015568477.717157682%3B-4368437.09908237%2015568468.47895944

Just to add, I have managed to get the script to convert to lat and longs, but its still not creating a geoshape in Survey123. Is the something else in the url OR the form that needs to be done in order to construct the shape?

arcgis-survey123://?itemID=6ffa91c679cd4ec99a6482e70dd3158e&center=-34.926006640680235%20138.59669421630525%3B-34.92639395082917%20138.59672384658316%3B-34.926403392567615%20138.59653796524657%3B-34.92640749222722%20138.59645756316633%3B-34.92642486038284%20138.59611928621797%3B-34.926311593671414%20138.5961108695519%3B-34.92627059577672%20138.5961077648081%3B-34.92603749657436%20138.59608996445877%3B-34.926006640680235%20138.59669421630525

JamesTedrick

Hi Chris,

- Yes, the coordinates need to be latitude and longitude (decimal degrees, expected SRID is WGS1984 (4326) ). This is most easily accomplished by creating your web map with a 4326-based basemap (Esri provides several to comply with organizations that have mandatory requirements to use WGS1984).

- You should not use the center parameter (which conceptually, would not make sense to pass a non-point object); use field:<fieldname>.

As an example, take a look at https://www.arcgis.com/home/item.html?id=9197d8545a214fe9829e95aa095302ec

Marc-AndreBedard

Perfect !

Arcade expression combined with a WGS84 basemap really did the trick !!!

Thank you James

TaraHaynes

Hey! I've been trying to figure this out, but it seems I don't have permission to view your survey - does the shape text translate to a shape on a map within the Survey123 form, or is it simply saved as text?

EA_Developer1

Was this ever solved? Im trying to pass the coordinates for a polygon via url but no luck on getting it to show up on the map within the survey.

?field:<geoshape field name>=47.31507205963135%20-122.41456244885921;47.314385414123535%20-122.41456244885921

ChrisRoberts2

This works for me. Below is the Arcade script I created:

var geom = Geometry($feature);
var firstpart = geom.rings[0];
var originShift = 2.0 * PI * 6378137.0 / 2.0;

var outparts = [];
var counter = 0;
for (var pt in firstpart){
var long = (firstpart[pt].x / originShift) * 180.0;
var lat = (firstpart[pt].y / originShift) * 180.0;
lat = 180.0 / PI * (2.0 * Atan( Exp( lat * PI / 180.0)) - PI / 2.0);

var lat =Round(lat, 5)
var long =Round(long, 5)
var ptstr = Concatenate(lat, " ", long);
outparts[counter]= ptstr;

Then create a hyperlink in the pop up: "arcgis-survey123://?itemID=xyz&field:Polygon={expression/expr0}"

With Polygon being the geotrace question in the survey

You might notice in my Arcade that I round the lat and long returns down to 5 decimal places. I found that leaving them as default would often fail for slightly complex polys which I think is due to the overall length of the url it produces.

Hope that helps

Chris

EA_Developer1

Thanks! Could you share what the url looks like, just the geometry part? Im passing the geometry through the REST API so I may have to format it within the script before passing it over in a similar fashion just different language. Also Im using a geoshape, not trace. Do you know if thats possible?

ChrisRoberts2

The Arcade expression is for the geoshape question, sorry miss typed there.

Here is one that copies a selected parcel in Explorer and parses the polygon to a Survey123 form (the bit in italics is what you want I think). Note I also capture the centroid of the Parcel so I can perform a reverse geocode in Survey123 to get the address

arcgis-survey123://?itemID=xyz&field:dcdbid_1=F112784A2&field:ct=CT&field:volume=5203&field:folio=279&field:LandholderLiaisonParcels_polygon=-35.03596%20138.83725%3B-35.03959%20138.8346%3B-35.03807%20138.83162%3B-35.0355%20138.83349%3B-35.03549%20138.83348%3B-35.03446%20138.83422%3B-35.03596%20138.83725&field:longitude=138.8344310701019&field:latitude=-35.03701676138787

EA_Developer1

Thanks Chris for the help! So I tested it but it doesn't translate to a shape on a map within the Survey form; is it just saved as text in the background?

ChrisRoberts2

Hi Rusty

Not sure why its not working for you, perhaps you could share the xlsform, and if I get a chance I'll have a look and see if there is anything obvious? If you parse the coordinates to the appropriate geoshape question in the form then in should work - field:LandholderLiaisonParcels_polygon=-35.03596%20138.83725%3B-35.03959%20138.8346%3B-35.03807%20138.83162%3B-35.0355%20138.83349%3B-35.03549%20138.83348%3B-35.03446%20138.83422%3B-35.03596%20138.83725

MaryGraceMcClellan

@JamesTedrick - I would love your feedback on the reverse of this question I just posted here: https://community.esri.com/t5/arcgis-survey123-questions/javascript-snippet-to-get-a-vertex-from-a-geotrace/m-p/1408192

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