The default reference system in survey 123 is WGS84. If we calculate the area using the area() function the resulting value is a geodesic area. How to calculate a planar area.
Feature Reports can choose between planar or geodesic area. Source here.
getValue
length, area, unit, measurement type
geotrace, geoshape
Map
Returns the length of a polyline, or the perimeter or area of a polygon, in given units and whether the measurements are planar or geodesic. Default measurement type is geodesic.
From that same document:
For geotrace and geoshape questions, you can use the getValue expression to display the length of the line or the perimeter of the polygon, respectively:${polyline1 | getValue:"length":"meters":"planar"}For geoshape questions, you can also use the getValue expression to display the area of the polygon:${polygon1 | getValue:"area":"hectares":"geodesic"}
For geotrace and geoshape questions, you can use the getValue expression to display the length of the line or the perimeter of the polygon, respectively:
${polyline1 | getValue:"length":"meters":"planar"}
For geoshape questions, you can also use the getValue expression to display the area of the polygon:
${polygon1 | getValue:"area":"hectares":"geodesic"}
As for within the actual Field App... I actually can't find a reference to these parameters.
I really need the data to be saved in a field. Not that I create any other ideas when generating the report @I really need the data to be saved in a field. Not that it creates any other ideas when generating the report @AI really need the data to be saved in a field. Don't let me create it when generating the report. Any other ideas @abureaux?
@abureaux, Perhaps the r system could be changed.Maybe you could change the reference system but I didn't find how to define it in XML forms either.
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