ArcGIS products quiz

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[Kuonirad]

Question 1

For using the The Collector for ArcGIS mobile app and display a drop-down menu of valid choices for the hydrant manufacturer attribute. The best method would be to create the list of values as a coded value domain. This is because a coded value domain is a predefined list of values that can be used to constrain the attribute values to a set of valid choices. This ensures that the data entered is accurate, consistent, and complete.

To create a coded value domain for the manufacturer field in the feature layer:

Sign in to your ArcGIS Online account and navigate to the feature layer that you want to edit. Click on the "Data" tab and select the manufacturer field from the list of fields. Click on the ellipsis button next to the field name and select "Manage domain" from the dropdown menu. In the "Manage Domain" dialog box, select "Coded Values" as the domain type. Enter the valid choices for the manufacturer field in the "Coded Values" table. You can also specify a code for each value to optimize performance. Click "Save" to save the domain. Once you have created the coded value domain for the manufacturer field, the Collector for ArcGIS mobile app will automatically display a drop-down menu of valid choices for the attribute when collecting data for the feature layer. This will allow the data to be entered with just a couple of taps, ensuring data accuracy and completeness.

[Kuonirad]

Question 2:

Equal Interval classification method in ArcGIS.

The Equal Interval classification method is a statistical technique used in ArcGIS for spatial data analysis and visualization. This method involves dividing the range of attribute values into equal-sized subranges or classes. The number of classes is determined by the user, and the range of values is divided equally among the classes.

The Equal Interval classification method is often employed when the data values are evenly distributed over the range of the data. In such cases, it helps to create a simple and easy-to-understand map with equal-sized classes. The method is most effective when dealing with continuous or ratio data that have a clear range, such as temperature or precipitation data.

In this method, the range of values is first calculated by subtracting the minimum value from the maximum value. The range is then divided by the number of classes to obtain the class interval. Each class interval is then assigned a range of attribute values, with the first class being the minimum value plus the class interval, the second class being the first class interval plus the class interval, and so on. This process continues until all the classes have been assigned a range of attribute values.

One of the advantages of using the Equal Interval classification method is that it creates classes that are easy to understand and interpret. This is because each class represents an equal range of attribute values, making it easier for the user to make comparisons between different regions or areas. However, the method is not suitable for all types of data, particularly those that are skewed or have a high degree of variability.

The Equal Interval classification method is an effective technique for creating thematic maps in ArcGIS. It is particularly useful for continuous or ratio data that are evenly distributed over the range of the data. The method creates classes of equal size, which makes it easier for users to interpret and understand the spatial patterns and variations in the data.