topic Re: Measure Features in ArcGIS Online, or Calculate Length in ArcGIS Online Questions

Measure Features in ArcGIS Online, or Calculate Length

JonathanMori1 — Wed, 15 Jul 2015 16:56:40 GMT

Is there a way to calculate length, or at least a tool to click and measure an individual feature? This is very important for the project we are working on as sometimes our users have to measure many features fairly quickly. It would take too much time to use the measure tool to manually measure each feature.

We are using FeatureServer Services from an Enterprise Geodatabase on ArcGIS Server 10.2.2.

Thanks!

Re: Measure Features in ArcGIS Online, or Calculate Length

PeteCrosier — Tue, 22 Sep 2015 15:17:40 GMT

Hi Jonathan, did you figure this out?

Re: Measure Features in ArcGIS Online, or Calculate Length

PeteCrosier — Sun, 12 Dec 2021 16:30:24 GMT

Very belated answer to my own question as I finally have lengths working! Used this custom attribute expression to display line lengths in a pop-up:

var total_length = 0.0;
for (var i in Geometry($feature).paths[0]) {
  if (i != 0) {
    var x = Geometry($feature).paths[0].x;
    var y = Geometry($feature).paths[0].y;
    var prev_x = Geometry($feature).paths[0][i - 1].x;
    var prev_y = Geometry($feature).paths[0][i - 1].y;
    total_length = total_length + (sqrt(pow(x - prev_x, 2) + pow(y - prev_y, 2)));
  }
}
return total_length;

Re: Measure Features in ArcGIS Online, or Calculate Length

PeteCrosier — Wed, 13 Dec 2017 09:25:28 GMT

In the new world you can use:

Length(Geometry($feature), 'meters');

.. much easier!

Re: Measure Features in ArcGIS Online, or Calculate Length

JonathanMori4 — Wed, 13 Dec 2017 14:42:59 GMT

Wow, this is great! Thanks!

I am curious if this will work with an enterprise geodatabase editing through ArcMap (maybe set up as a feature service through AGOL), I highly doubt it though as you'd probably have to do the editing through AGOL.

Re: Measure Features in ArcGIS Online, or Calculate Length

AnudeepGorantla — Thu, 17 Jan 2019 18:37:17 GMT

WHAT WERE THE UNITS OF THE LENGTH IS IT Meters or Feet?

Re: Measure Features in ArcGIS Online, or Calculate Length

JeffWard — Thu, 16 Jul 2020 21:45:34 GMT

ArcMap has a built in "Calculate Geometry" option that allows you to calculate the length of features. You don't have to use Arcade, you just specify units.