What is the main purpose of the Spatial Data Transfer Standard (SDTS)?

The main purpose of the Spatial Data Transfer Standard (SDTS) is indeed to set standards for data conversion. SDTS was developed to facilitate the transfer of spatial data between different systems and organizations. It aims to ensure that data can be easily shared and interpreted, regardless of the software or hardware used. By establishing a standardized format, it promotes interoperability and reduces the complications associated with transferring spatial data across various platforms.

For example, when data is collected from one GIS software and needs to be used in another, having a common standard allows for a seamless exchange without the need for extensive reformatting or risk of data loss. This standardization is crucial for effective data sharing and integration, especially in collaborative projects that involve multiple stakeholders or when combining data from diverse sources.

The other options, while relevant to various aspects of GIS, do not align with the fundamental goal of SDTS. Increasing data storage deals with hardware capacities or database designs, enhancing visualization techniques pertains to how data is displayed or represented, and managing user access control is focused on security and permissions and does not relate to data exchange standards.