on January 20, 2023

Understanding Unique Value Symbology?

Geographic Information Systems

How do I find unique values in ArcGIS?

and click Unique Values to open the Symbology pane. , on the Field 1 menu, choose a field on which to symbolize.



In this topic

  1. Set the color scheme target.
  2. Modify unique value symbology.
  3. Vary unique value symbology by transparency, rotation, size, or color.


What is a unique values map?

Unique values maps use unique symbols to style distinct categories in your map, so you can see where point, line, and area features are located and what type they are, such as tree species or restaurant types. Unique values maps help you answer questions, such as: Where is it located?

How to symbolize points based on multiple attribute values in ArcGIS Pro?

How To: Symbolize points based on multiple attribute values in…

  1. Symbolize the point layer using unique values, and select the field containing the attribute to base the color symbology on.
  2. Click Vary symbology by attribute.
  3. Select Size, and select the field to symbolize.

What does symbology mean in GIS?

Symbology is the use of symbols to represent the features and attributes of a map layer. For example, in a layer of cities, black circles might symbolize the cities. The size of the circles might be varied to symbolize each city’s population.

What are unique values?

Unique values are the items that appear in a dataset only once. Distinct values are all different items in a list, i.e. unique values and 1st occurrences of duplicate values.
 

What is a unique identifier in GIS?

Unique ID is a tool that generates custom IDs and GIS features designed to work seamlessly with your GIS database and is built to seamlessly integrate with Cityworks software. Your GIS is now customized to match your workflows and processes.
 

How do you find a unique value?

Filter for unique values or remove duplicate values

  1. To filter for unique values, click Data > Sort & Filter > Advanced.
  2. To remove duplicate values, click Data > Data Tools > Remove Duplicates.
  3. To highlight unique or duplicate values, use the Conditional Formatting command in the Style group on the Home tab.


What are the 5 elements of mapping?

Map Elements. Most maps contain the same common elements: main body, legend, title, scale and orientation indicators, inset map, and source notes.

How do you calculate unique values?

You can use the combination of the SUM and COUNTIF functions to count unique values in Excel. The syntax for this combined formula is = SUM(IF(1/COUNTIF(data, data)=1,1,0)). Here the COUNTIF formula counts the number of times each value in the range appears. The resulting array looks like {1;2;1;1;1;1}.



How do I select multiple unique values in ArcMap?

How To: Select multiple values using the Select By Attributes…

  1. In ArcMap, open the attribute table of the layer.
  2. Click the Table Options button. > Select By Attributes.
  3. Double-click the field that contains the desired values.
  4. Add a space after the field name and type IN.
  5. Select the parentheses icon.

 

Which command is used to get unique results?

SELECT DISTINCT statement

The SELECT DISTINCT statement is used to return only distinct (different) values.

How do you filter unique?

To filter for unique values, click Data > Sort & Filter > Advanced. To remove duplicate values, click Data > Data Tools > Remove Duplicates. To highlight unique or duplicate values, use the Conditional Formatting command in the Style group on the Home tab.