topic Re: Measurement tool not correct in ArcGIS Experience Builder Questions

Measurement tool not correct

CameronLang1 — Wed, 04 Jun 2025 19:37:36 GMT

Has anyone noticed the measurement tool with EXP builder not measuring the correct length? No matter what the unit is, it is off.

Curios to hear other people take.

Re: Measurement tool not correct

JeffreyThompson2 — Wed, 04 Jun 2025 20:39:55 GMT

You are not the only one to notice this issue.

Do you use Web Mercator or WGS84 for your basemap or something else? I think the Measurement Widget was only designed for Web Mercator/WGS84.

If you would like a Measurement Widget that can handle any coordinate system, this one was designed for it. https://community.esri.com/t5/experience-builder-custom-widgets/advanced-draw-widget-improvements-import-export/ba-p/1618579

Re: Measurement tool not correct

ClintOffutt1 — Thu, 05 Jun 2025 12:55:00 GMT

I have noticed this. Area measurements are also off. Basically, all forms of interactive measurement, whether through the Measurement widget or the the Draw widget can not be taken seriously. Taking measurements in a GIS is such a core function and the ExB tools to do so are very primative and inaccurate.

I used to complain there was no way to log or label individual segments on a multi segment measurement, as if that was a big deal, now I don't even believe simple measurements are trustworthy and asking for a more complex measuring tool is asking for more issues. This is a shame because I build web apps for County appraisers who work with cadastral data, surveys, metes & bounds legal descriptions, deed work, etc every day and they have no way to "follow along" such material on the mapping, or even take a measurement we can believe in.

Re: Measurement tool not correct

RhettZufelt — Thu, 05 Jun 2025 16:16:20 GMT

Suspect it is because you are using Web Mercator for you maps as it is known to throw 'inaccurate measurements', especially the farther away you get from the equator.

My ExB app(s) are all in State Plane, and I get about as close of measurements as I can without ExB supporting snapping in the measure tool.

Re: Measurement tool not correct

ClintOffutt1 — Thu, 05 Jun 2025 18:02:25 GMT

I have posted the following several times:

I have a web map in the my local stateplane projection. When using the Draw widget tool tips and constraits, the "total length" (or total area if drawing polygon) does not match the label that is placed when Show area measurement is checked on.

I don't think the issue is with the basemap coordinate system, I think the issue is with the measurement widget and draw widgets. You can't trust either!