PRTree

PRTree is a powerful spatial index software tool that stands as an implementation of a priority R-Tree. Written in Java, this software comes in a small jar file without any extra packages. This software solution is designed to be memory efficient, as it doesn't force users to create an MBR or Box for each object in the tree. Instead, users can provide a class that can provide the bounds of each object whenever it is needed.

With this software, users can gain greater control over the caching of bounds. Its example usage is straightforward and impressive, making it ideal for different types of users. For instance, in setting up the PRTree for use, all that is required is to use the following command:

```
PRTree< Rectangle2D > tree = new PRTree< Rectangle2D > (new Rectangle2DConverter (), 10);
```

To load the rectangle:

```
Rectangle2D rx = new Rectangle2D.Double (0, 0, 1, 1);
tree.load (Collections.singletonList (rx));
```

Finally, to find the rectangle, simply use the following command:

```
for (Rectangle2D r : tree.find (0, 0, 1, 1)) {
System.out.println ("found a rectangle: " + r);
}
```

What's more, this software package now has a C# port of the code. PRTree is efficient, fast, easy to use, and eliminates the need for developers to create separate files for each object in the tree. It's a powerful spatial index software tool that is a must-have for any software development team.