Region
geo data can contain useful categorical and numeric data for network planning. For
instance, here is a section of polygon data from the
US Census imported into Overture using the
US Data Module
Each polygon has multiple data columns associated with it, but this example uses the
TotalPops column, which is an estimate of the residential population contained within
the polygon.
Network performance simulation in Overture uses raster, or bin-based, data. For
each bin, statistics such as signal strength and cover probability are calculated.
To include the census data in statistics, they must also be rasterized (also known as rendering).
This is done dynamically using a Density From Regions component.
After
adding a new density component
of type Density From Regions,
the properties of the component can be seen here:
The Selected Column property is set to point at the TotalPops column in this instance.
The resulting map can be seen below.
The
Analysis Region
resolution, boundary, and projection dictates the rendering.
The census data TotalPops column contains the total number of people in each polygon,
therefore this data must be spread throughout the whole polygon area to create a density value.
Note that this is controlled by the Spread Data property.
Each density value is calculated as the value in the polygon (from the TotalPops column in this example)
divided by the polygon area as calculated using the
Havesine formula.