Introducing JViews Maps > Basic Concepts > Map Preparation > Grids, Units, and Measures

JViews Maps allows you to overlay grid systems and set your preferred units and measures.

Grid Systems

Predefined grids are provided for:

Adaptable Grids

The grids are called adaptable grids because they adapt to the zoom level to ensure that there is always something meaningful on the screen.

There is no impact on memory and little on performance. JViews Maps uses optimized parameters including, for example, delayed drawings. In this case, a simplified grid is displayed during zooming and panning, with only the 20 lines needed drawn on the view. When the view stops moving, it displays the more refined grid and labels.

Units

JViews Maps supports different units, including:

Kilometer 
Meter 
Decimeter 
Centimeter 
Millimeter 
International Nautical Mile 
International Inch 
International Foot 
International Yard 
International Statute Mile 
International Fathom 
International Chain 
International Link 
U.S. Surveyor's Inch 
U.S. Surveyor's Foot 
U.S. Surveyor's Yard 
U.S. Surveyor's Chain 
U.S. Surveyor's Statute Mile 
Indian Yard 
Indian Foot 
Indian Chain 

 

Extending Units

You can extend the supported units for linear and angular measurements.

Different measuring units can be used for distances and altitudes.

Working units can de changed dynamically, with conversion computed by a set of provided components.

Measuring

JViews Maps provides off-the-shelf components and end-user interactors for orthodromy measurements of distance and bearing.

Distances can be measured in the supported units and changed dynamically.