Mapping Signal Strength
In the previous chapter, we prepared the TelZaViBA geodatabase and map
document. We created the TelZaViBa Visual Studio project where we added the
show tower range button. You also learned about the geodatabase and the feature
classes, and some basic geometry operations. However, we only managed to show
the range of the tower, and calculating the signal strength for a given point on
the map is a different story. In this chapter, we will do some more geometrical
operations on our towers to calculate the signal strength.
In this chapter, we will discuss the following topics:
• Adding a point to the map
• Finding the distance between two points
• Finding and highlighting the closest tower
• Displaying signal strength
Adding a point to the map
In this section, we will first discuss and explain the ArcGIS coordinate system. Then
we will use a new add-in control to interact with the map. We will use the tool
control to add a point to the map. This point, which is identified by two important
parameters, x and y, represents a cell phone location.
The ArcGIS coordinate system
ArcGIS supports two different coordinate systems. The geographic coordinate system
that uses decimal degrees (longitude and latitude) and the other one is the projected
coordinate system that uses metric (x and y). There are just different ways to identify a
location, and in this book we will be using the projected coordinate system.
In the previous chapter, we prepared the TelZaViBA geodatabase and map
document. We created the TelZaViBa Visual Studio project where we added the
show tower range button. You also learned about the geodatabase and the feature
classes, and some basic geometry operations. However, we only managed to show
the range of the tower, and calculating the signal strength for a given point on
the map is a different story. In this chapter, we will do some more geometrical
operations on our towers to calculate the signal strength.
In this chapter, we will discuss the following topics:
• Adding a point to the map
• Finding the distance between two points
• Finding and highlighting the closest tower
• Displaying signal strength
Adding a point to the map
In this section, we will first discuss and explain the ArcGIS coordinate system. Then
we will use a new add-in control to interact with the map. We will use the tool
control to add a point to the map. This point, which is identified by two important
parameters, x and y, represents a cell phone location.
The ArcGIS coordinate system
ArcGIS supports two different coordinate systems. The geographic coordinate system
that uses decimal degrees (longitude and latitude) and the other one is the projected
coordinate system that uses metric (x and y). There are just different ways to identify a
location, and in this book we will be using the projected coordinate system.
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