Because a map is smaller than the objects it represents, for a map to be readable its elements must be generalized (that is, simplified). Although the AnyLogic GIS map tile layer has such generalization built in, for some elements that you add to a map, such as routes or regions, you may need to manually configure their generalization settings.
Depending on the generalization settings and how many points are used to display an object, when you run a model its GIS routes and the borders of its GIS regions may appear quite rough and jagged. Although increasing the number of points to display will bring an object closer to its real scale and make it appear smoother, this can also degrade the model’s performance.
When you create routes or regions for a GIS map at design time, they have maximum precision. But just as it is not possible to display all the streets in every city when a map displays a country, at smaller map scales fewer points are displayed. If you zoom in on a map you will see that as more points are displayed a route or region becomes more detailed and less generalized. At design time, the generalization of routes and regions works the same way as the tile layer generalization.
The generalization settings for routes and regions are triggered when you run the model. Below you can see two figures displaying the same route with two different generalization settings. The first figure displays greater detail, but will decrease the model’s performance; moreover, agents following this route will rotate too often and make the animation look odd. The second figure provides a more acceptable level of detail.
Agent's travel time along a route does not depend on the generalization; rather, it depends only on the actual route length. Therefore, route generalization does not degrade accuracy in travel time. Generalization affects only the model’s animation and its performance.
Grasse-Toulon route created with generalization up to 100 meters
The same route created with generalization up to 1000 meters