Defining a Mapserver Circle Symbol

Defining a Mapserver Circle Symbol

Just a quick use case, we required a circle symbol in Mapserver, but our current circles were based on a single point, giving us poor legend outputs (i.e. a . instead of a o ) Mapserver vector symbols are defined using a cartesian coordinates system (no surprises...
Seaway distances with PostgreSQL

Seaway distances with PostgreSQL

Seaway distance, or the shortest route between two points via water, is an important measure of risk for disease spread between aquaculture establishments. Salmon aquaculture, for example, is usually located in complex fjords, which means that there are numerous...
Temporo-spatial visualisation of disease outbreaks

Temporo-spatial visualisation of disease outbreaks

In epidemiology, analysis of data by space (mapping) and by time (e.g. epidemic curves) are seen as essential tools for understanding disease dynamics and causal factors. However, temporo-spatial visualisation has been less commonly used because of the complexity of...