What are the two key parameters for dimension location type?

The correct answer highlights the specific terminology and format used within Looker for defining geographic dimensions. In LookML, when you are creating a dimension that captures location data, you define the latitude and longitude using parameters called sql_latitude and sql_longitude. This allows Looker to understand how to retrieve the latitude and longitude values from the underlying database fields.

The use of ${field_name_1} and ${field_name_2} indicates a way to reference existing fields in your LookML model, providing a flexible way to point to the actual coordinates stored in your database. By incorporating these attributes, you can ensure that the mapping of geographic data is correctly structured and recognized by Looker, which is essential for functionalities like location visualizations and geospatial analysis.

Other options fail to match the specifics required by Looker’s syntax and functionality: they either use general terms or names that aren't relevant in the context of Looker’s LookML. Understanding how to implement these parameters allows developers to create effective visualizations and geospatial analyses, making it an important aspect of LookML development.