What type of measures did settlers use with respect to the location of outhouses?

Settlers employed sanitation measures with respect to the location of outhouses to ensure proper waste management and public health. These measures were crucial in maintaining hygiene standards and preventing contamination of water sources, which were often a concern in settlements. Poorly situated outhouses could lead to the spread of diseases due to improper disposal of human waste, highlighting the importance of sanitation practices.

While the other options touch on important aspects of land use and environmental management, they do not specifically address the primary concern regarding the placement of outhouses. Established no-build zones relate to land development regulations, flood prevention regulations focus on mitigating flood risks, and environmental conservation practices emphasize protecting natural resources. However, the direct and pressing need to deal with human waste effectively is what led to the implementation of sanitation measures by settlers in their communities.