Measure Polygon and amount of included area

[PhilippGottschalk]

Hey

i am quite new to ArcGis Online and trying to explore all features. Rn i need to measure the area of a hand written polygon - i just saw the option to redraw it with the measurement tool ... there should be an option to automatically measure it right?

Besides of that i have an area of underlying parcels. I would like to know how many of those parcels are included in the drawn polygon and with how many acres or square meters. 

thanks in advance 

[HarishKV]

1. Measuring the Area:

   • Open your map in ArcGIS Online.
   • Click on the "Content" tab, then find and select the layer containing your polygon features.
   • Click on the "Analysis" button in the toolbar at the top.
   • In the Analysis pane, select "Measure" from the list of tools.
   • Click on the "New Measurement" button and select "Area."
   • Draw your polygon on the map. As you draw, you will see the area measurement displayed.

   If you're looking for an option to automatically measure the area without redrawing, unfortunately, that might not be available directly. The Measurement tool is designed for on-the-fly measurements.

2. Calculating the Number of Parcels and Their Area:

   To calculate the number of parcels included in the drawn polygon and their respective areas, you'll need to perform a spatial analysis. You can use the "Overlay Layers" tool to achieve this. Here are the steps:

   • In the Analysis pane, select "Overlay Layers" from the list of tools.
   • Configure the tool as follows:
     • Input Layer: Select the layer containing your parcels.
     • Overlay Layer: Select the layer containing your drawn polygon.
     • Operation: Choose "Intersect."
     • Output Layer: Give a name for the output layer.
   • Run the analysis.

   The output layer will contain the parcels that intersect with the drawn polygon. You can then view the attribute table of this layer to see the number of parcels and their respective areas.

Please note that the exact steps and options might vary slightly depending on the specific version and configuration of ArcGIS Online you are using. If you're encountering any specific issues or have additional questions, feel free to ask!

[HarishKV]

Sorry about the mention of version. It depends on the map viewer that you are using.

[AmandaRing]

@PhilippGottschalk  You can use the actually use the Summarize Within tool to get both of your desired results in one tool run.

• In the Analysis pane, select "Summarize Within" from the list of tools.
• Configure the tool as follows:
  • Input features: Select the layer containing your parcels.
  • Summary polygon layer: Select the layer containing your drawn polygon.
  • Make sure you keep Include summarized geometry of features turned on, and specify either Acres or Square Meters as your Summarized area units.
  • Output name: Provide a name for the result.
• Run the analysis.

If you open the attribute table for the output layer, you will see the count of parcels and the total summarized area (in acres or square meters) of the parcels that fall within the boundary of your drawn polygon, and then area in square miles of your originally drawn polygon.

If you wanted to know how much of each parcel fell within the boundary of the drawn polygon, you could do so by setting some kind of identifying field for the parcel as the Group by field.
The output will then also produce a table which will break down the amount of each parcel that falls within the drawn boundary.

Hope this helps!

Cheers,