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Posted on January 22, 2023 (Updated on July 10, 2025)

How to mask an area in ArcMap and run supervised classification on unmasked area?

Hiking & Activities

How do I mask an area in ArcGIS?

To mask a layer, follow these steps:

  1. Choose one or more layers to be masked in the Contents pane.
  2. On the Feature Layer tab, in the Drawing group, click Masking .
  3. On the drop-down menu, check one or more layers in the list. The layers with check marks mask the selected layer.


How to do supervised classification in ArcMap?

Quote from video: First you need to activate the image classification toolbar. If this option is not available to you then you need to enable the spatial analyst extension.

What does extract by mask do in ArcGIS?

Extracts the cells of a raster that correspond to the areas defined by a mask.

How do I mask labels in ArcMap?

Right-click the data frame name in the table of contents and open the Advanced Drawing Options dialog box. Check Draw using masking options specified below. Uncheck this to turn off masking. Click the layer(s) that you want to use as a mask in the Masking Layers list.

How do I mask an area code?

Enter *67 before the entire number, then press the call button.

How do I apply an effect only to a masked area?

Twirl down the effect to reveal the Compositing Options in the timeline (does not reveal in the Effect Control panel). Hit the plus button to make a Mask Reference. Select your mask. The effect will only be applied to the masked area.
 

How to do supervised classification?

When you run a supervised classification, you perform the following 3 steps:

  1. Select training areas.
  2. Generate signature file.
  3. Classify.

 

Which of the following are methods for supervised classification?

Supervised machine learning techniques that have been trialled include Maximum Likelihood Estimation, k-Nearest Neighbour, various decision trees, Random Forest, Artificial Neural Networks, Support Vector Machines and Bayesian Decision Rules.

Which is better supervised or unsupervised classification?

Quote from video:

How do I mask part of a layer?

Select the two images you want to mask and arrange them in two separate layers. Select a layer in the Layers panel and click the ‘Add layer mask’ button at the bottom of the panel. A white layer mask thumbnail will appear on the selected layer, revealing everything on the selected layer.
 

How do I mask part of an image?

Quick steps for creating a clipping mask:

  1. Select a text or graphic layer to fill with an image.
  2. Click Fill with image on the tool palette & choose an image.
  3. Select Edit image fill on the Text Tools panel.
  4. Adjust the image behind your text or shapes, then click Done.

 

How do you select an area in a layer mask?

Click the layer’s thumbnail (on the left) to select the contents of the layer, or click the mask’s thumbnail (on the right) to select the layer mask. But you can also switch between the layer and the mask from your keyboard: To select the layer, press Ctrl+2 (Win) / Command+2 (Mac).

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